bluuebunny/crossref_metadata_2025 huggingface dataset:
Quantitative structure‐retention relationship for photosystem II inhibitors in RP‐HPLC
Authors: Qin‐Sun Wang , Ling Zhang , Huar‐Zheng Yang , Hua‐Yin Liu
Published: September 2010

Using factor analysis (principle component) and multiple linear regression methods, 4 solute‐related structure parameters were selected from 10 structure parameters and the relationships between the retention properties (logk') of 25 2‐cyano‐3‐methylthio‐3‐substituted amino‐acrylates and the 4 parameters were established. There is a good agreement between the observed k' values and the predicted k' values.
A practical synthesis of novel hydroxyl‐substituted macrocyclic tri‐, tetra‐ and hexa‐mines
Authors: Guo‐Ping Xue , Yong Liu , Cheng‐Tai Wu
Published: September 2010

Macrocyclic tri‐ and tetra‐amines containing a hydroxyl group in the ring have been preparad in moderate yields by a 1:l cyclocondensation of 1,3‐dichloro‐2‐propanol with the disodium salt of N‐tosylated diethylenetriamine and triethylenetetraamine. In the case of condensation of 1,3‐dichloro‐2‐propanol with the disodium salt of N‐tosylated diethylenetriamine, the 2:2 cyclocondensation product, dihydroxyl macrocyclic hexaamine, was also isolated.
Reactions of enamines with fluorinated acyl chlorides — Synthesis of fluorinated 1,3‐diketones and 1,3‐keto‐aldehydes
Authors: Hai‐Ying He , Yan‐Ling Qu , Cheng‐Xue Zhao
Published: September 2010

The reactions of enamines (1a–b, 4, 6) with fluorinated acyl chlorides (2a–d ) produced fluorinated 1,3‐diketones (3a–f) and 1,3‐keto‐aldehydes (7a–c) in good yields as well as byproducts fluorinated acylamides (5a–c). It is proposed that the reactions involve nucleophilic attack by the C‐atom and/or N‐atom of the enamines on acyl carbon of the fluorinated acyl chlorides.
Cu(OTf)2‐catalyzed ring‐opening of epoxides with anilines: A convenient synthesis of β‐amino alcohols
Authors: Xue‐Long Hou , Jie Wu , Li‐Xin Dai
Published: September 2010

The regioselective ring‐opening of epoxides with aniline and p‐chloroaniline catalyzed by copper(II) triflate provides the corresponding β‐amino alcohols in excellent yields.
Direct chiral high performance liquid chromatography separation of O‐ethyl O‐phenyl N‐isopropylphosphoroamidothioates
Authors: Gao Ru‐Yu , Huang Jun‐Min , Yang Guo‐Sheng , Yang Hua‐Zheng , Wang Qin‐Sun
Published: September 2010

The enantiomers of thirty‐nine O‐ethyl O‐phenyl N‐isopropyl phosphoroamidothioates have been separated by high performance liquid chromatography on a Pirkle model chiral stationary phase using ten mobile phase. Chromatographic data are presented for the separation of these organic phosphorus enantiomers on the chiral phase. The influences of molecular structures and compositions of mobile phases have been described.
Study on the chemisorption kinetics of Methylene Blue using SERS technique
Authors: Chen Wan‐Xi , Jiang Hua , Xu Zhu‐De , Lu Yun
Published: September 2010

SERS technique wae used to study the chemiesorption kinetics of Methylene Blue (MB) on the HNO3‐etched silver surface. The adsorption kinetic parameters were deduced from different vibrational modes at a low concentration of 3.5 × 10−6 mol/L, and it showed that MB adsorbed uniformly (monolayerly) on silver surface. However, the adsorptive behavior turned anomalous at relatively higher concentrations and a possible explanation was suggested. In addition, the influence of Cl− ions on the adsorption states of MB was investigated, and it was shown that MB molecules, adsorbed on the silver surface, tended to transform the “lying‐down” state to the “end ‐ on” 4 state after CI− ions were added.
Chemometrics to chemical modeling: Novel molecular distance‐edge vector (λ) in alkanes and retention index of gas chromatography
Authors: Yin Chun‐Sheng , Pan Zhong‐Xiao , Yi Zhong‐Sfaeng , Li Zhi‐Iiang , Zhang Mao‐Sen
Published: September 2010

Systematic studies are made on application of chemometrics to chemical modeling and/or molecular modeling as well as the regularity of retention index for gas chromatography (GC). A set of novel molecular graph theoretical parameters, called the molecular distance‐edge (MDE) vector (λ), is proposed ad found to be excellently correlated to retention index of GC for alkanes. The MDE parameters were tested by the multiple linear regression (MLR) estimation and production of the retention index of GC, and the results obtained are satisfactory.
Preparation of twelve 1‐methyl‐2‐formyl‐5‐substituted pyrroles and their hydrazones
Authors: He Hai‐Ying , Jiang Xi‐Kui
Published: September 2010

Preparation of twelve 1‐methyl‐2‐formyl‐5‐substituted pyrroles (2a–1), with five of them as new compounds, is described. Their derivatives, i.e., 1‐methyl‐2‐formyl‐5‐substituted pyrrole phenyl hydrazones (3a–1) and 1‐methyl‐2‐formyl‐5‐substituted pyrrole (4‐nitrophenyl) hydrazones (4a–1) are all new compounds. They have also been prepared and further identified.
Supercritical fluids: Clean solvents for green chemistry
Authors: F'Oliakoff Martyn , George Michael W. , Howdle Steven M. , Bagratashvili Viktor N. , Han Bu‐Xing , Yan Hai‐Ke
Published: September 2010

Supercritical fluids are becoming increasingly attractive as environmentally acceptable replacement for organic solvents in chemical reactions and material processing. This paper highlights some of the properties of supercritical fluids, especially supercritical CO2, which offer particular advantages for the handling of polymers, metal complexes and the environmentally more friendly synthesis and manufacture of chemicals. The paper includes same of the researches in University of Nottingham and a number of recent reviews which together provide a comprehensive introduction.
FTIR study of hydrogen bonding of stearic acid with ethanol, dimethyl sulfoxide, and acetonitrile in supercritical CO2
Authors: Mao Can , Lu Jie , Xu Qun , Chen Shi‐Juan , Ke Jie , Han Flu‐Xing , Yan Hai‐Ke
Published: September 2010

FTIR spectroscopy was used to study the hydrogen bonding of stearic acid with ethanol, dimethyl sulfoxide (DMSO), and acetonitrile in supercritical CO2 at 318. 15 K, and 12.5 and 16.5 MPa. The concentration of the cosolvents range from 0–0.6 mol·L−1. The area percentage of absorption bands for hydrogen‐bonded and nonhydrogen‐bonded species was Obtained from the IR spectra. The acid and the cosolvents can form hydrogen bond even when their concentrations a very low. At fixed solute concentration, the extent of hydrogen bonding increases with cosolvent concentration. At higher ethanol concentrations, it seems that one stearic acid molecule can hydrogen bond with more than one ethanol molecules simultaneously. It is seen that the strength of the hydrogen bond formed by the acid and the cosolvents is in the order: DMSO ethanol acetonitrile.
Fluorocarbon‐ containing hydrophobically modified poly( N‐isopropylacrylamide)
Authors: Zhang Yun‐Xiang , Fang Qin , Fu Yu‐Qing , Da Ai‐Hua
Published: September 2010

A fluorocarbon‐modified ply( N‐isopropylacrylamide) has been synthesized by copolymerization of N‐isopropyl acrylamide with a small amount of acrylate or methacrylate containing a perfluoroalkyl group. It was found that the hydrophilicity of macromolecular backbone is an important factor to the solution properties of the copolymers and that hydrophobic association between fluorocarbon group is stronger than that between the corresponding hydrocarbon analogies. The viscosity of some of the copolymer solutions was very sensitive to temperature. It was dilatant at higher fluorocarbon comonomer content ( 0. 20–1.0 mol%) and was Newtonian at very low fluorocarbon comonomer content (0.03–0.2 mol%). Evidence for hydrophobic association of the fluorocarbon groups was obtained from the effects of adding NaCl and surfactants on the solution viscosity. The LC‐ST properties of these copolymers were studied by DSC method and this was also found to be consistent with hydrophobic association between the fluorocarbons.
Green chemistry of chromate cleaner production
Authors: Zhang Yi , Li Zuo‐Hu , Qi Tao , Wang Zhi‐Kuan , Zheng Shi‐Li
Published: September 2010

Research topics and methods of green chemistry in chromate production are introduced in this paper. New original green chemical process of the heterogeneous reaction and separation system of liquid phase oxidation of chromite in molten salt of sodium hydroxide—one way separation in high concentration medium—metastable phase separation—carbonate recycle conversion has been developed. The green commercial process for comprehensive utilization of mineral resources—reactant recycle inside the process—zero emission was established.
Differential diffusion quantum Monte Carlo method: Determination of potential energy surfaces of molecules
Authors: Huang Hong‐Xin , Cao Ze‐Xing , Zeng Xian‐Biao , Li Ze‐Lin , Zeng Yue , Yang Zhi‐Jian
Published: September 2010

A differential approach for self‐optimizing diffusion Monte Carlo calculation was proposed in this paper, which is a new algorithm combining three techniques such as optimizing, diffusion and correlation sampling. This method can be used to directly compute the energy differential between two system in the diffusion process, making the statistical error of calculation be reduced to Order of 10−‐5 hartree, and recover about more than 80% of the correlation. We employed this approach to set up a potential energy surface of a molecule, used a “rigid move” model, and utilized Jacobi transformation to make energy calculation for two configurations of a molecule having good positive correlation. So, an accurate energy differential could be obtained, and the potential energy surface with good quality can be depicted. In calculation, a technique called “post‐equilibrium remaining sample” was set up firstly, which can save about 50% of computation expense. This novel algorithm was used to study the potential as molecular spectroscopy and the energy variation in chemical reactions.
Asymmetric 1,3‐dipolar cycloaddition of nitrile oxides with optically active vinylboronic ester
Authors: Jiang Biao , Zhang Ao , Kan Ying
Published: September 2010

Pinanyldioxy styrylboronic ester (1) was employed for asymmetric 1,3‐dipolar cycloaddition with nitrile oxides, optically active Δ2‐isoxazolines (3) or 4‐hydroxy‐ Δ2‐isoxazolines (4) were obtained. The effect of different bases on the selectivity of the cycloaddition reaction was studied.
A straight synthesis of 2–(α‐substituted N‐tosylaminomethyl)‐2,5‐dihydrofurans by the reaction of N‐sulfonylimines with arsonium 4‐hydroxyl‐ cis ‐2‐butenylides
Authors: Li An‐Hu , Deng Wei‐Ping , Dai Li‐Xin , Hou Xue‐Long
Published: September 2010

On treatment of N‐tosylimines (1) and 4‐hydeoxyl‐ cis‐butenyl arsonium salt (5) with KOH in acetonitrile at room temperature, 2–(α‐substituted N‐tosylaminomethyl)‐2, 5‐dihydrofurans (4) were obtained in moderate yields. The arsonium salt (5) acts formally as an equivalent of 2,5‐dihydrofuran synon. A plausible mechanism was proposed for this new 5‐membered cyclization reaction.
Synthesis, characterization and crystal structures of manganese (II) complexes containing nitronyl nitroxide and its reduced derivative
Authors: Zhang Lei , Li Su‐Qi , Liao Dai‐Zheng , Jlang Zong‐Hui , Yan Shi‐Ping , Wang Geng‐Lin , Wang Zhi , Shen Pan‐Wen , Yao Xin‐Kan , Wang Hong‐Gen
Published: September 2010

Two novel adducts of formula Mn(hfaC)2(NITPhCLI)2 (1) and Mn(hfac)2(IMHPhCl)I2(NIT‐PhCl) 0.5H2O (2), where hfac = hexafluoroacetylacetonate, NITPhCI = 2–(3‐chlorophenyl)‐4,4,5,5‐tetramethylimidazolyl‐1‐oxyl‐3‐oxide, IMHPhCl = 2‐(3‐chlorophenyl)‐4, 4, 5, 5‐tetramethylimidazolyl‐3‐oxide, have been prepared by the reaction of Mn(hfac)2 2H2O with NITPhCI. Compound 1 is triclinic, space pup P‐1 with a = 1. 3003(3)nm, b= 1.3138(3)nm, c = 1.4931 (3)nm, α = 83.74(3),β= 77.77(3)., σ = 60.59(3)., V = 2.171(1)nm3, Z=2. Compound 2 is triclinic, Space group P‐1 with a = 1.2994(3) nm, b=1.4841(3) nm, c = 2.1031(4) nm, a = 92.30(3),β= 98.68(3), σ = 97.89(3), V = 3.964(2) nm3, Z=2. Each manganese atom is hexacoordinated in both compounds and compound 2 is organized‐ in chains by hydrogen bonds between neighboring pairs of NITPhCI and NITPhCI.
Cycloaddition of benzoheteroazepine III Reaction of 2,3‐dihydro‐1H‐15benzodiazepines with dichlorocarbene and stereo‐structures of products
Authors: Zhang Xin‐Yu , Xu Jia‐Xi , Jem Sheng
Published: September 2010

Reaction of 2, 3‐dihydro‐1H‐1. 5‐benzodiazepines with dichlorocarbene generated in situ using benzyltriethylammonium chloride (TEBA) as a phase transfer catalyst in chloroform‐aqueous sodium hydroxide mixture gave mainly 1,2‐cycloadducts, cis and trans‐1a, 3‐disubstituted‐1, 1‐dichloro‐1a, 2,3,4‐tetrahydro‐1H‐azirino[1,2‐a][1,5]benzodiazepines (2.3), and formylated 1,2‐cycloadducts, trans‐1a,3‐disubstituted‐1, 1‐dichloro‐4‐formyl‐1a, 2, 3, 4–1 H‐azirino[1, 2‐a][1, 5]benzodiacepines (4). The stereo‐structures of cycloadducts and the mechanism are also discussed.
Thermodynamic study of axial coordination reaction of zinc porphyrin with metal Schiff base and imidazole complex
Authors: Ruan Wen‐Juan , Zhu Zhi‐Ang , Bu Xian‐He , Zhang Zhi‐Hui , Chen Yun‐Ti
Published: September 2010

A thermodynamic study is reported for the coordination reaction of ZnT ( m‐X)PP derivatives (X = NO2, Cl, OCH3, H or CH3) with various ligands L (L= imidazole (Im), 2‐methylimidazole (Melm), clotrimidazole (CIM), imidazol‐4‐carboxaldehyde (4‐CHOIm), unsymmetrical tetradentate copper Schiff base, Culm(p‐C1), Ch(p‐Br), and nickel Schiff base, Nilm(p‐CI)), in dichloromethane solvent. Conversion of the four‐coordinated ZnT( m‐X)PP to the five‐coordinated species is followed and isosbestic behavior is exhibited in the region among 450 and 700 nm. The reaction of a copper(II) or nickel(II) imidazolate Schiff base with ZnT( m‐X)PP results in the formation of an imidazolate bridged heterobinuclear complex. The stochiometric number is unity for all axial ligands. The equilibrium constants were determined using the β band of ZnT( m‐X)‐PP in the 293–308 K range by the method of Rose and Drago. It increases with decrease in temperature, and ΔH0 0, Δ09 0. The stronger the nucleophilic ability of the axial ligand is, the larger the stability of the axial coordination product is. Hammet linear relationships and isoequilibrium relationships exist in the system studied.
Synthesis and electroluminescent properties of naphthalimide derivatives
Authors: Yin Shou‐Cen , Xu Zheng , Huang Wen‐Qiang , Zhang Fu‐Qiang , Hou Yan‐Bing , Wang Yong‐Sheng , Xu Xu‐Rong
Published: September 2010

Naphthalimide derivatives, N‐ethyl‐4‐acetylamino‐l,8‐naphthalimide (EAAN) and polymer with N‐propyl‐4‐acetylamino‐1,8‐naphthalimide (PAAN) side‐chain (P‐PAAN) were successfully synthesized. Electroluminescent devices of ITO/PVK(120nm)/EAAN(50nm)/Al(150nm) (I) and ITO/PVK+ P‐PhAN(10:1) (50nm)/Al( 150nm) (II) constructed with EAAN and P‐PAAN as the emitting layer were investigated, whereas the single‐layer devices of ITO/EAAN or P‐PAAN(50nm)/Al(150nm) (III) were not observed to have any e‐mission light. The emission results revealed that the exaction recombination formed by positive and negative charge carriers injected from electrodes of devices I and II was much more balanced than that of devices III, which implied that naphthalimide derivatives are a new type of electron‐transporting materials with high performance. The electron‐transporting properties of naphthalimide derivatives were also elucidated by investigation of the electroluminescent behaviors from both devices of ITO/PPV (80nm)/Al and ITO/PPV (80nm)/EAAN (20)nm)/Al hch fabricated with EAAN as the electron‐transporting layer.
Synthesis and magnetic interaction of μ‐2‐chloroterephthalato binuclear iron (II) complexes
Authors: Li Yan‐Tuan , Yan Cui‐Wei , Liao Dai‐Zheng
Published: September 2010

Four μ‐2‐chloroterephthalato binuclear iron (II) complexes, namely [Fe2 (CTPHA) L4] (ClO4)2 where L stands for 4,4′‐dimethyl‐2,2′‐bipyridine (Me2‐bpy); 2,9‐dimethyl‐l, 10‐phenanthroline (Me2‐phen); 5‐chloro‐1, 10‐phenanthroline (Cl‐phen); 4, 7‐diphenyl‐1, 10‐phenanthroline (Ph2‐phen), respectively, and CTPHA represents 2‐chloroterephthalate dianion, have been synthesized and characterized. Based on the elemental analyses, molar conductance measurements and spectroscopic studies, extended CTPHA‐bridged structures consisting of two iron(II) ions, each in a distorted octahedral environment, are proposed for these complexes. [Fe2(CTPHA)‐(Me2,‐bpy)4] (CIO4)2 (1) and [Fe2(CT‐PHA). (Me2‐phen)4 ](CIO4)2 (2) complexes were characterized by variable temperature magnetic susceptibility (4–300 K) measurements and the observed data were successfully simulated by the equation based on the spin Hamiltonian operator, Ĥ = ‐ 2JŜ1, * Ŝ2, giving the exchange integrals J = ‐ 1.28 cm−1 for 1 and J = ‐ 1.85 cm‐1 for 2. These results indicate the presence of a weak antiferromagnetic spin‐exchange interaction between the metal ions within each molecule.
Studies on synthesis and magnetic resonance of lanthanide complexes with novel Schiff base derived from noncyclic polyether and β‐diketone
Authors: Wu Jing , Yao Ke‐Min , Hu Xiao‐Li , Shen Lian‐Fang , Yuan Han‐Zhen
Published: September 2010

Nine h( III) complexes with a novel Schiff base derived from diglycolamine and benzoylacetone (BZDA) have been synthesized and characterized. They can be formulated as [Ln2(BZDA)3(NO3)3](NO3)3‐nH2O (LnLa, Pr, Nd, Sm, n = 4; Ln = Gd, Tb, Er, Yb, Y, n = 7). Enamic form mechanism in this β‐diketone Schiff base and its Complexes were suggested and proved by IR, UV and NMR methods. The 13C spin‐lattice relaxation time T1 and the ratios of r(Ci‐In)/ r (cj‐in) were measured by a 500 MHz NMR instrument for elucidating the formation of the stable six‐membered chelate ring structure in these complexes. The EPR spectrum of the Gd( III) complex exhibits the “U” spectral feature and “zero field effect”. On the basis of them, the crystal field strength and the local symmetry around Gd 3+ in the complex have been discussed.
Synthesis of a pair of novel receptors and their properties of enantioselective recognition for amino acid zwitterions
Authors: Lu Guo‐Yuan , Liu Fang , He Wei‐Jiang , Wang Zhi‐Lin , Hu Hong‐Wen , Prados Pliar , Mendoza Javier De
Published: September 2010

A pair of artificial enantiotopic receptors la and lb composed of (S,S) or (R,R) chiral bicyclic guanidinium, azacrown ether and (t‐butyldiphenylsilyloxy) methyl group for amino acid zwitterions have been synthesized. The liquid‐liquid competition experiments and 1 H NMR studies indicate that the receptor 1a with (S, S) configuration and 1b with (R,R) configuration selectively recognize L‐ and D‐aromatic amino acids & respectively.
HgCl2‐Catalyzed monobenzylation and monoallylation reactions of 1‐phenyl‐l‐alkynes
Authors: Ma Sheng‐Ming , Wang Ii‐Sha
Published: September 2010

A general procedure for the HgCl2‐mediated monolithiation reaction of 1‐phenyl‐l‐alkynes was developed.
Ab initio study of sphere‐like mesogen properties
Authors: Fu‐Jiang Ding, , Liang‐Fu Zhang, , Tian‐Zhi Wu, , Li‐Kui Jiang,
Published: September 2010

Sphere‐like compound C8H17Si(OPhC12H25)3N (1) forms mesophases. In order to investigate the relationship between molecular structure and liquid crystal properties, structural studies are carried out on the model molecules of compound 1 and its substituted derivatives using ab initio calculations. The results show that the cyano or chloro substituted tribenzosilatrane compounds R Si(OPhR2)3N (R1,R2 = CN or Cl) have much bigger dipole moments or anisotropy of polarizability and more like sphere than the corresponding alkyl substituted compounds. Cyano or chloro substituted tribenzosilatranes would be better candidates for sphere‐like mesogens.
Studies of copper (II) complexes as catalysts for the hydrolysis of DNA
Authors: Rui Ren, , Pin Yang,
Published: September 2010

Hydrolysis of DNA is an important enzymatic reaction, but it is exceedingly difficult to mimic in the laboratory because of the stability of hydrolysis of DNA. In this paper, the cleavage activity of complexes formed between Cu(II) and four different amino acid or amino acid methyl ester on DNA is studied by gel electrophoresis. It is found that DNA could be cleaved by Cu(II)‐L‐His and Cu(II)‐L‐His methyl ester complexes and the efficiency of cleavage is largely dependent on the metal ion‐to‐ligand ratio. Further experiments show that the cleavage of DNA mediated by Cu(II)‐L‐His complexes occursvia a hydrolytic mechanism and the active chemical species that affects DNA cleavage is proposed to be MI2H+ and MI2H22+.
Crystal structure and fluorescence spectrum of the complex [Eu(III)(TTA)3(phen)]
Authors: Mao‐Lin Hu, , Zhen‐Yan Huang, , Ya‐Qian Cheng, , Shm Wang, , Juan‐Juan Lin, , Yi Hu, , Duan‐Jun Xu, , Yuan‐Zhi Xu,
Published: September 2010

The title complex Eu(III)(TTA)3(phen) (where TTA = thenoyltrifluoroacetone monoanion; phen = 1,10‐phenanthroline) has been synthesized in mixed solvents of acetone and ethanol (1:1 volume ratio) and its crystal structure has been determined by X‐ray diffraction. The complex crystals are triclinic, space group P 1 (# 2) with cell dimensions of a = 1.32.41 (2) nm, b = 1.5278(4) nm, c = 0.9755(3) nm, α = 92.49 (2)°, β = 102.57(2)°, γ = 91.62(2)°, V = 1.9268(8) nm3, Z = 2, μ (Mo Ka)= 18.77 cm−1, Dx=1.720 g/cm3. The coordination geometry of Eu atom is a distorted square antiprism, and the encapsulated structure that can meet the structural requirement of the typical europium luminescent sensor. The fluorescence spectrum suggests that the complex is a strong photoluminescent material.
Electron‐transfer fluorescence quenching processes in coaggregates between excited N‐alkylcarbazoles as electron donors and 2,4‐dinitrophenyl carboxylates or pentafluorophenyl carboxy‐lates as acceptors
Authors: Ji‐Liang Shi , Hu‐Nan Yi , Jia‐Yi Xu , Xi‐Kui Jiang
Published: September 2010

Electron‐transfer processes facilitated by hydrophobic‐lipophilic interaction (HLI) between excited N‐alkylcarbazoles (1‐n, n = 4, 8, 12, 16) as electron donors and 2,4‐dinitrophenyl carboxylates (2‐n, n = 4, 8, 12, 16) or pentafluorophenyl carboxylates (3‐n, n = 4, 8, 12, 16) as electron acceptors have been investigated by means of fluorescence spectroscopy in aqueous or aquiorgano binary mixtures. The fluorescence quenching of ‐n* by 2‐n or ‐ n indicates that preassociation precedes the electron transfer. The extent of HLI‐driven coaggregation of the acceptor and the donor may be assessed from the B value of the equation I0/I = A + B [Q]. The chain‐length effect and possibly also a chain‐fold‐ability effect, as well as the solvent aggregating power (SAgP) effect have been observed. Comparison of roe quenching constants (B) for 1‐n*/2‐n combinations and 1‐n*/ 3‐n combinations shows that the order of increasing B values for the quenching processes is 3‐n < 2‐n.
Lamellar liquid crystal polymerization of sodium oleate/oleic acid/octadiene/water system
Authors: Rong Guo , Qing‐Hong Fu
Published: September 2010

In the lamellar liquid crystallization (LLC) phase of NaOL/ OLA/H2O system, the small angle X‐ray diffraction measurements show that the oleic add is solubilized in the oil layer at first and men into the amphiphile layer. The octadiene added is also located partly in the oil layer and partly in the amphiphile layer in the LLC. With the addition of octadiene as cross‐linking agent, roe LLC phase of NaOL/OLA/H2O system was polymerized under the initiation of AIBN with the protection of pure nitrogen at 60°C. Most of the double bond absorption of the monomers in IR spectra disappeared after polymerization. The polymerization takes place not only in the middle of the amphiphile layer between the double bonds of NaOL or OLA and those of octadiene, but also in the oil layer of LLC between the double bonds of OLA and those of octadiene. Interlayer spacing measurements on the copolymer proved d values decreased by about 1 ‐ 2 nm compared with those of the corresponding system before the polymerization, indicating a disruption of the ordered structure by the polymerization. The copolymer still has superior surface activity with the critical micellar concentration (CMC) decreased almost to the half of the value for the system before the polymerization.
Location of ethanol in sodium dodecyl sulfate aggregates
Authors: Tian‐Qing Liu , Wd‐Li Yu , Rong Guo
Published: September 2010

The hexagonal liquid crystalline phase of SDS (Sodium dodecyl sulfate)/H2O system changes into lamellar liquid crystal and the effective length of surfactant molecule d0/2 in the lamellar liquid crystal decreases with the addition of ethanol. The micellar aggregation number N of SDS decreases and the micellar diffusion coefficient increases with the added ethanol. Under a constant concentration of SDS, the molecule number ratio of ethanol to SDS in the micelle increases with the concentration of ethanol and even exceeds 10 when ethanol concentration is 1. 085 mol/L. All these results show that ethanol, even though a short chain alcohol and soluble in water, can partly exist in the interphase of the amphiphilic aggregates showing some properties of co‐surfactant.
Retention model of protein for mixed‐mode interaction mechanism in ion exchange and hydrophobic interaction chromatography
Authors: Yin‐Mao Wei , Quan‐Zhou Luo , Tong Liu , Xin‐Du Geng
Published: September 2010

A unified retention equation of proteins was proved to be valid for a mixed‐mode interaction mechanism in ion exchange chromatography (IEC) and hydrophobic interaction chromatography (HIC). The reason to form a “U” shape retention curve of proteins in both HIC and IEC was explained and the concentration range of the strongest elution ability for the mobile phase was determined with this equation. The parameters in this equation could be used to characterize the difference for either HIC or IEC adsorbents and tbe changes in tbe molecular conformation of proteins. With the parameters in this equation, the contributions of salt and water in tbe mobile phase to the protein retention in HIC and IEC were discussed, respectively. In addition, the comparison between the unified equation and Melander's three‐parameter equation for mixed‐mode interaction chromatography was also investigated and better results were obtained in former equation.
Aminolysis reaction of calix[4]arene esters and crystal structures and conformational behaviors of calix[4]arene amides
Authors: Yong Wu , Hui‐Biao Liu , Jun Hu , Yong‐Jiang Liu , Chun‐Ying Duan , Zheng Xu
Published: September 2010

We first make use of aminolysis of calix[4]arene esters to synthesize calix[4]arene amides. When the two ethyl esters of the calix[4]arene esters are aminolysized, the 1, 3‐amide derivative is formed selectively. The crystal structures of the calix‐[4] arene with two butyl amide (3b) and four butyl amide moieties (4b) were determined. The intermolecular hydrogen bonds make 4b form two‐dimensional net work insolid state. The 1H NMR spectra prove mat 3b is of a pinched cone conformation, while 4b and tetraheptylamide‐calix[4]arene (6b) take fast interconversion between two C2r isomers in solution and appear an apparent cone conformation at room temperature. As decreasing temperature, the interconversion rate decreases gradually and, finally, the interconversion process is frozen at Tc = −10°C, which makes both conformations of 4b and 6b the pinched cone structures. The hydrogen bond improves the interconversion barrier, and the large different values of the potential barrier between 6b and 4b (or 6b) may be of forming different hydrogen bonds.
Redox reactions of cytochrome c facilitated by silver‐imidazole complex
Authors: Chun‐Hai Fan , Gen‐Xi Li , De‐Xu Zhu , Jian‐Qin Zhu
Published: September 2010

An imidazole modified silver electrode is prepared by immersing the substrate silver electrode in a 2% imidazole solution of ethanol at 50°C for 10 min. The modified electrode is men swept in a cytochrome c solution and the modified layer takes off because the modified electrode is very unstable. Although the amount of the silver‐imidazole complex is very small compared with the amount of cytochrome c in the protein solution, it greatly facilitates redo reactions involving the biomacromolecules.
Synthesis of a new macrocyclic compound and its self‐assembly
Authors: Zhi‐Quan Pan , Qin‐Hui Luo , De‐Liang Long , Jiu‐Tong Chen
Published: September 2010

A new macrocyclic compound has been synthesized by condensation of pyridine‐l‐oxide‐2, 6‐dialdehyde with diethylenetriamine. The self‐assembly behaviours were studied by X‐ray diffraction. The results show that the self‐assembly were controlled by intermolecular hydrogen bonds and π‐π stacking effects.
Aggregating tendencies of some N‐alkylcarbazoles
Authors: Ji‐Liang Shi , Hu‐Nan Yi , Jia‐Yi Xu , W‐Kui Jiang
Published: September 2010

Aggregation of some nitrogen‐containing heterocyclic compounds have been investigated by means of fluorescence spectroscopy in aqueous or aquiorgano binary mixtures of different Φ values for the first time. The aggregators studied are N‐butylcarbazole (CBZ‐4), N‐octylcarbazole (CBZ‐8), N‐dodecylcarbazole (CBZ‐12), and N‐hexadecylcarbazole (CBZ‐16). Their aggregating tendencies have been evaluated by measuring their critical aggregate concentration values (CAgC's). Our results indicate that the N‐alkylcarbazoles, just like the anthracene derivatives with different chain‐lengths, can also be used as fluorescence probes for evaluating aggregating tendencies or CAgC values.
A trinuclear Mo‐Fe‐Mo cluster compound [Et4N] {[Me2dtcMoO(μ‐S)2]2Fe} containing dialkyldithiocarbamate ligand
Authors: Yan‐Shi Zhang , Qiu‐Tian Liu , Hong‐Ping Zhu , Yi‐Hui Chen , Chang‐Neng Chen
Published: September 2010

A trinuclear linear Mo‐Fe‐Mo dialkyldithiocarbamate complex [Et4N] {[Me2dtcMoO(μ‐S)2]2Fe} has been obtained and structurally characterized, which contains two Me2dtcMoO(μ‐S)2 units coordinated to a central tetrahedral Fe atom. A comparison of the structural parameters indicates the metal oxidation states of 2Mo(v) + Fe(III). The 1H NMR shows chemical shifts of Me2dtc ligands at δ 10.14 and δ 9.40 with the intensity ratio of 1:1. Tbe cyclic voltammogram displays a reversible couple at ‐1.41 V/ ‐1.36 V responsible for 1‐/2‐anions of tbe complex and an irreversible oxidation at 0.5 V, which seems to show the apparent lack of stability for its neutral species (Me2dtcMoOS2)2Fe.
Characteristics of mass spectra of dichlorocarbene derivatives of isomeric dodecen‐1‐ols
Authors: Gu Yuan , Yan‐Jun Wei , Gang Chen
Published: September 2010

The m/z of characteristic ion of the mass spectra of the dichlorocarbene of dodecen‐1‐ols was used as a parameter to locate the position of double bond in these isomers by a new formula.
An unexpected synthesis of an α, β, γ, δ‐unsaturated ketone due to an abnormal opening of benzylidene acetal by bromide anion
Authors: Chang‐Qing Wei , Gang Zhao , Yu Ding
Published: September 2010

An unexpected synthesis of an α, β, γ, δ‐unsaturated ketone, which embodies a new type of oxy‐carbon cyclic structure, was achieved, while we tried to construct the taxane CB‐ring system. Also, a series of abnormal reaction phenomens was found to be related to the formation and reaction of seven membered cyclic benzylidene acetal.
Asymmetric 1,3‐dipolar cycloaddition of nitrile oxides to chiral acryloyl esters bearing glucofuranose as auxiliary
Authors: Ao Zhang , Ying Kan , Biao Jiang
Published: September 2010

Asymmetric 1,3‐dipolar cycloaddition of nitrite oxides to an acryloyl ester (1) derived from 1, 2:5, 6‐di‐O‐isopropylidene glucose (6) was studied. Solvent and temperature effect was discussed. The single diastereoisomer was isolated with high diastereoselective excess.
A new synthesis of cytotoxic (+)‐7‐epi‐Goniofufurone
Authors: Min Yang , Hong‐Ming Li , Gang Zhao , Qing‐Sen Yu , Yu Ding
Published: September 2010

Cytotoxic styryl lactone, ( + )‐7‐epi‐Goniofufurone (1), has been prepared with a new route from 3‐O‐benzyl‐1, 2‐O‐isopropylidene‐5‐C‐phenyl‐β‐L‐ido‐pentofuranose (6), a derivative of (+)‐glucose. Treatment of 14 with HCl solution cleaved TBDMS and isopropylidene and simultaneously caused ring closure to afford 1 while treatment of 14 with Sc(OTf)3 only removed TBDMS to give 15.
Lipase catalyzed synthesis of epoxy‐fatty acids
Authors: Qian Chen , Zu‐Yi Li
Published: September 2010

Lipase catalyzed synthesis of epoxy‐fatty acids from unsaturated carboxylic acids was investigated. Under mild condition unsaturated carboxylic acids were converted to peroxycarboxylic acids by lipase with hydrogen peroxide, then the unsaturated peroxycarboxylic acids epoxidised the C = C bond of themselves.
Microbial reduction of sulfur‐containing ketones by Geotrichum sp.
Authors: Zhi‐Liang Wei , Zu‐Yi Li , Guo‐Qiang Ijn
Published: September 2010

Bioreduction of some β‐carbonyl phenyl sulfides, sulfoxides and sulfones (1, 3, 5, 8, 11 and 13) by Geotrichum sp. was studied. Reduction of β‐carbonyl phenyl sulfoxides (5 and 8) gave anti‐Prelog sulfoxide alcohols. (S,Ss)‐3‐Chloro‐1‐phenylsulfinylpropan‐2‐ol (9) WBP obtained in high yield with 95% e. e. after recrystallization from methylene chloride petroleum ether.
XANES at Eu‐L3 edge and valence of europium in SrB4O7: Eu and BaB8O13:Eu
Authors: Hong‐Bin Liang , Tian‐Dou Hu , Shu‐Bin Wang , Qing‐Hua Zeng , Zhi‐Wu Pei , Qiang Su
Published: September 2010

The luminescent materials SrB4O7:Eu and BaB8O13:Eu were synthesized, and the valence states of europium in the materials were measured by means of XANES at En‐L3 edge. It is found that the Eu3+ and Eu2+ ions are all present in the materials, and more Eu3+ ions can be reduced in SrB4O7: Eu than in BaB8O13:Eu. The excitation and emission spectra of Eu3+ in SrB4O13:Eu and BaB2O13:Eu were determined.
H atom transfer of collinear OH…O system
Authors: Tao Wu , Xian‐Yang Chen , Jian‐Bo Peng , Guan‐Zhi Ju
Published: September 2010

A quantum mechanical calculation was performed to study the hydrogen atom transfer of collinear OH…O/OD…O system, for which Delves' coordinates and R‐matrix propagation method were applied in a Melius‐Blint potential energy surface. The calculation result showed that the state‐state H atom transfer probability comported strong oscillation phenomena and collision delay time of the title system was in the fs‐ps time scale. The kinetic isotope effect was calculated in this work too.
Interface diffusion and chemical reaction of PZT layer/Si (111) sample during the annealing treatment in air
Authors: Yong‐Fa Zhu , Pei‐Yu Yan , Tao Yi , Li‐Li Cao , Long‐Tu Li
Published: September 2010

The interface diffusion and chemical reaction between a PZT (PbZrxTi1‐xO3) layer and a Si(111) substrate during the annealing treatment in air have been studied by using XPS (X‐Ray Photoelectron Spectroscopy) and AES (Auger Electron Spectroscopy). The results indicate that the Ti element in the PZT precursor reacted with residual carbon and silicon, diffused from the Si substrate, to form TiCx, TiSix species in the PZT layer during the thermal treatment. A great interface diffusion and chemical reaction took place on the interface of PZT/Si also. The silicon atoms diffused from silicon substrate onto the surface of PZT layer. The oxygen atoms, which came from air, diffused into silicon substrate also and reacted with Si atoms to form a SiO2 interlayer between the PZT layer and the Si (111) substrate. The thickness of SiO2, interlayer was proportional to the square root of treatment time. The formation of the SiO2 interlayer was governed by the diffusion of oxygen in the PZT layer at low annealing temperature, and governed by the diffusion of oxygen in SiO2 interlayer at high annealing temperature. The apparent activation energy of the interface oxidation reaction was about 39.1 kJ/mol.
Structure and physico‐chemical properties in mixed aqueous solution of sodium alkylcarboxylate‐alkyltrimethylammonium bromide
Authors: Jian‐Bin Huang , Guo‐Xi Zhao , Xu He , Bu‐Yao Zhu , Hong‐Lan Fu
Published: September 2010

The physico‐chemical properties of organized assemblies (micelle or vesicle) from sodium alkylcarboxylate ‐ alkyltrimethyl ‐ammonium bromide mixture have been investigated systematically. In different mixed cationc‐anionic surfactant systems, micelles and vesicles can coexist or be transformed into each other on different conditions. The experimental results are explained prelimilarily from the viewpoint of molecular packing geometry. The solubilization of organic compound in the mixed surfactant system was also studied in detail.
Synthesis and properties of the chain‐like polymeric copper (II) complexes bridged by bis(diphenylphosphino oxide) ethane
Authors: Rui‐Na Yang , Yu‐An Sun , Yi‐Min Hou , Xiao‐Yuan Hu , Dou‐Man Jin
Published: September 2010

At room temperature, the chain‐like polymeric copper (II) complexes bridged by bis (diphenylphosphino oxide) ethane (dppeO2), [Cu(dppeO2)X2]n[XCI(1), Br(2)] have been prepared and characterized by elemental analysis, 31P NMR, TG‐DTA and X‐ray analysis for [ CuBr2 ( dppeO2) ]n. The chain is composed of submits containing tetrahedron coordinated copper (II) atoms. The four‐coordinated copper(II) atom is ligated to another four‐coordinated copper(II) atom through dppeO2. The coordination sphere of copper (II) atom is completed by two monodentate bromide and two oxygen atoms from bridging dppeO2. Crystal data are as follows: C26‐H24CuP2Br2O2, 0.50 mm × 0.40 mm × 0.40 mm, monoclinic, space group: C2/c, λ = 0.07107 nm(Mo K α), a= 1.2286(2) nm, b=2.0555(8) nm, c = 1.0652(2) nm, β=97.366(9)°, V = 2.668nm3 Z = 4, Dcalc =1.628 g·cm−3, R=0.066; Rw = 0.091.
Synthesis, crystal structure and magnetic properties of the binuclear copper (II) complex of a new bis (1, 4, 7, 10‐tetraazacyclododecane) ligand
Authors: Qiang Xu , Miao Du , Ruo‐Hua Zhang , Hao‐Yu Shen , Xian‐He Bu , Wei‐Ming Bu
Published: September 2010

A new binucleating macrocyclic ligand 2,6‐bis (1,4,7,10‐tetraazacyclododecan‐10‐ylmethyl) methoxy‐benzene (L) and its binuclear copper (II) complex, [Cu2LBr2] (CIO4 )2 · 3H2O (1), was prepared and the structure was determined by X‐ray crystallography. Complex 1 crystallizes in monoclinic crystal system, P21/n space group with a = 0.8206(3), b =2.0892(8), c = 2.3053(7) mn, β = 95.83(2)°, V = 3.932 nm3, Mr=1017.57, Z = 4, Dc =1.692 g/cm3, and R= 0.0489, Rw 0.0552 for 6571 observed reflections with I ≥ 2σ (1). Both of the copper(II) centers are coordinated by four amine nitrogen donors of cyclen subunits and a bromide anion, and each copper(II) ion is in a square‐pyramidal coordination environment. Variable temperature magnetic susceptibility studies indicate that there exists weak intramolecular antiferro‐magnetic coupling ( −2J = 2.06 cm−1) between the two copper (II) centers.
Mass spectrometric studies of cis‐ and trans‐1a,3‐disubstituted‐1,1‐dichloro‐4‐formyl‐1a, 2,3,4‐tetrahydro‐lH‐azirino[1,2‐a]1,5]benzodiazepines
Authors: Jia‐Xi Xu , Xin‐Yu Zhang , Sheng Jin
Published: September 2010

The mass spectrometric behaviour of four cis‐ and trans‐1a,3‐disubstituted‐1,1‐dichloro‐4‐formyl‐1a,2,3,4‐tetrahydro‐1H‐azirino [1, 2‐a][1,5]benzodiazepines has been studied with the aid of mass‐analysed ion kinetic energy spectrometry and exact mass measurements under electron impact ionization. All compounds show a tendency to eliminate a chlorine atom from the aziridine ring, and then eliminate a neutral propene or styrene from the diazepine ring to yield azirino [1,2‐b][1,3] benzimidazole ions. These azirino [1,2‐a][1,5]‐benzodiazepimes can also eliminate HCl, or Cl plus HCl simultaneously to undergo a ring enlargement rearrangement to yield 1,6‐benzodiazocine ions, which further lose small molecular fragments, propyne or phenylacetylene, with rearrangement to give quinoxaline ions.
Synthesis of an analog of (+)‐goniopypyrone from 3‐O‐benzyl‐1,2‐O‐isopropylidene‐5‐ C‐phenyl‐α‐D‐gluco‐pentofuranose
Authors: Hong‐Ming Li , Min Yang , Gang Zhao , Qing‐Sen Yu , Yu Ding
Published: September 2010

8,9‐Dimethoxy‐7‐epi‐goniopypyrone, an analog of (+)‐goniopypyrone, was synthesized from 3‐O‐benzyl‐1, 2‐O‐isopropylidene‐5‐C‐phenyl‐α‐D‐gluco‐pentofuranose (3).
Synthesis of two pentaarylated [60]fullerene derivatives Ar5C60‐H (Ar = p‐MeC6H4, m‐MeC6H4) and their novel electrochemical properties
Authors: Li‐Cheng Song , Peng‐Chong Liu , Qing‐Mei Hu , Fiero Zanello , Marco Fontam
Published: September 2010

Through one pot reaction of C60 with organocopper/magnesium reagent ( p‐MeC6H4 )2 CuMgBr or ( m ‐ MeC6 H4 )2‐CuMgBr prepared from CuBr‐Me2S and p‐MeC6H4MgBr or m‐MeC6H4 MgBr and subsequent quenching with aqueous NH4Cl, two pentaarylated [ 60 ] fullerene derivatives (p‐MeC6H4)5 C60H (1) and (m‐MeC6H4)5 C60H (2) have been synthesized in 94% and 96% yields, respectively. While known compound 1 prepared via this improved method is unambiguously identified, new compound 2 is fully characterized by elemental analysis, IR, UV‐vis, 1H NMR and 13C NMR spectroscopies. Additionally, electrochemical study shows that the two [60] fullerene derivatives 1 and 2 in dichloromethane solution display two sequential one‐electron reductions which are shifted by about 0.4 V towards more negative potential values with respect to free C60. Such remarkable cathodic shift is attributed to the multiple breakage of the double‐bond conjugation within the Fullerene core.
Bis‐perfluoroalkylation of aromatic compounds with sodium perfluoroalkanesulfinates
Authors: Jin‐Tao Liu , He‐Jun Lu
Published: September 2010

Bis‐perfluoroalkylation of aromatic compounds such as dimethoxybenzenes (2, 4, 6), anisole (8), pyridine (10) and quinoline (13) was accomplished by reaction with excess sodium perfluoroalkanesulfinates, RFSO2Na (1), in the presence of Mn(OAc)3·2H2O under mild conditions. The reaction provides a facile method for the synthesis of bis‐perfluoroalkylated aromatic compounds.
A new class of chiral pyrrolidine ligands for homogeneous catalytic enantioselective cyclopropanation of styrene
Authors: Min Shi , Jian‐Kang Jiang
Published: September 2010

A new class of chiral pyrrolidine ligands have been successfully synthesized and their chiral induction abilities have been examined in the homogeneous catalytic enantioselective cyclopropanation of styrene. 15–30% enantiomeric excess (ee) has been achieved.
Chiral guanidine catalyzed Michael addition reaction and Diels‐Alder reaction of anthrone and N‐methylmaleimide
Authors: Bin Peng , Ke‐Jun Cheng , Da‐Wei Ma
Published: September 2010

Two chiral guanidines were evaluated as catalysts for the reaction of anthrone (1) with N‐methylmaleimide (2). When guanidine 5 was used, the Michael adduct 4 was isolated as a major product. The best enantioselectivity (70% ee) was obtained when the reaction was carried out in THF at ‐20°C.
Linearity relationship between solvatochromic shifts of stilbazolium‐like dyes and modified reaction field function
Authors: Chuan‐Lang Zhan , Duo‐Yuan Wang
Published: September 2010

We analyzed statistically the linear correlation of the solvatochromic shifts of the stilbazolium‐like dyes in the nonselected solvents with the reaction field function, L(ϵT) — bL(n2), and the solvent polarity parameter, ENT respectively, and observed that there were not perfectly linearity relationships between them, so we introduced ENT into L(ϵT) — bL( n2) to form a new reaction field function, L(ϵT) — bL(n2) + g ENT called as me modified reaction field function, which can be perfectly linearly correlated with the solvatochromic shifts of the stilbazolium‐like dyes in the nonselected solvents.
A novel N—N bond cleavage reaction of 4‐amino‐1, 2, 4‐triazole derivatives
Authors: Guang‐Fu Yang , Hua‐Zheng Yang
Published: September 2010

5‐Substituted‐4‐animo‐3‐thiol‐l,2,4‐triazoles (1a—b) react with ortho nitrochloro‐benzene or para‐nitrochlorobenzene to give N—N bond cleavage products 2a—d, one structure of which (2b) has been unambiguously confirmed by an X‐ray structural analysis.
Synthesis and structure of the first propeller‐shaped helical coordination polymer { [ Ag( S, S )‐bis(oxazoline) ] (OTf) } ∞
Authors: Sheng‐Ming Ma , Shu‐Lin Wu
Published: September 2010

A mixture of (S, S)‐bis(oxazoline) ligand (1) with silver trifluoromethane sulfonate afforded a helical coordination polymer (2). Its structure was determined by X‐ray angle‐crystal diffraction.
Geometry optimizations of benzene clusters using a modified genetic algorithm
Authors: Wen‐Sheng Cai , Fang Yu , Xue‐Guang Shao , Zhong‐Xiao Pan
Published: September 2010

A modified genetic algorithm with real‐number coding, non‐uniform mutation and arithmetical crossover operators was described in this paper. A local minimization was used to improve the final solution obtained by the genetic algorithm. Using the exp‐6–1 interatomic energy function, the modified genetic algorithm with local minimization (MGALM) was applied to the geometry optimization problem of small benzene clusters (C6H6)N(N = 2–7) to obtain the global minimum energy structures. MGALM is simple but the structures optimized are comparable to the published results obtained by parallel genetic algorithms.
Pulse radiolysis study of rapid electron transfer from electron adduct and reducing OH adduct of dAMP to riboflavin and flavin adenine dinucleotide (FAD)
Authors: Chang‐Yuan Lu , Zhen‐Hui Han , Tie‐Cheng Tu , Jin‐Ling Mlvo , Si‐De Yao , Nian‐Yun Lin
Published: September 2010

Rapid electron transfer from electron adduct and reducing OH adduct of 2‐deoxyadenosine‐5′‐monophosphate acid (dAMP) to riboflavin (RF) and flavin adenine dinucleotide (FAD) was studied using the time‐resolved pulse radiolysis techniques. Both spectroscope and kinetic analyses showed that transient absorption spectrum of electron adduct or OH adduct of dAMP formed at first, and men changed to that of radical anion of RF or FAD after several microseconds of pulse. The evidence indicated that electron transfer from electron adduct and reducing OH adduct of dAMP to RF or FAD did occur. From buildup or bleaching kinetics of radical anions of RF and FAD, the rate constants for electron transfer were determined, respectively.
A fluorescence probe study of the mixed surfactant vesicles
Authors: Hong‐Ru Li , Fang Gao , Chen‐Ho Tung , Li‐Zhu Wu
Published: September 2010

Vesicle can be prepared from aqueous mixtures of simple commercially available, single‐tailed cationic and anionic surfactants. In this work, the I3/I1 value, Ie/Im value, and fluorescence lifetime of pyrene in different systems (see the preparation of samples) were determined. The essential affecting factors in the formation of vesicle can be deduced from the obtained results. It showed that large vesicle must form naturally before sanitation in 0.082 M octyltrimethylammonium bromide and sodium laurate pH=9.2 aqueous solution. While after sonication, only small vesicle exists, which can be proved further through electron microscope.
Synthesis, structural characterization and magnetic property of nanocomposite materials: Intercalation compounds of FePS3 with 1, 10‐phenanthroline or 2, 2′‐bipyridine
Authors: Xing‐Guo Chen , Chu‐Luo Yang , Jin‐Gid Qin , Kyuya Yakushi , Yasuhiro Nakazawa , Kenji Ichimura
Published: September 2010

Two new intercalation compounds Fe0.90 PS3 (phen)0.41 (1) (phen stands for 1, 10‐phenanthroline including a part of 1, 10‐phenanthroline H+ ) and Fe0.83 PS3 (bipy)0.34 (2) (bipy stands for 2,2′‐bipyridine H+) were synthesized by the reaction of the layered FePS3 with 1, 10‐phenanthroline or 2,2′‐bipyridine in the presence of anilinium chloride. They were characterized by elemental analyses, powder X‐ray diffraction (XRD), infrared spectroscopy. The lattice spacing of the intercalate was expanded by 0.90 nm for Fe0.90 PS3(phen)0.41 and 0.57 nm for Fe0.83 PS3 (bipy)0.34 with respect to the pristine FePS3, indicating that the ring plane of the guests is perpendicular to the layer of the host. The UV‐vis absorption spectra of the filtrate in preparation of the intercalates indicate that 1,10‐phenanthroline or 2,2′‐bipyridine also acts as a complexing agent to remove intralamellar Fe2+ ions into the solution during intercalation. The magnetic properties of 1 and 2 were studied.