bluuebunny/crossref_metadata_2025_split huggingface dataset:
Solvent-Dependent cis-trans One-Way Photoisomerization of Bisformyl-Substituted 1,6-Diphenyl-1,3,5-hexatriene
Authors: Sonoda Yoriko , Suzuki Yasuzo 
Published: March 2006

Abstract
trans,trans,trans-1,6-Bis(p-formylphenyl)-1,3,5-hexatriene underwent stereoselective photoisomerization to give its cis,trans,trans isomer regardless of the solvent polarity. Quantum yields of trans,trans,trans-to-cis,trans,trans isomerization decreased dramatically with decreasing solvent polarity, whereas those of the reverse reaction gradually increased. This led to the cis,trans,trans-to-trans,trans,trans ‘one-way’ isomerization in nonpolar solvents.
Liquid-Junction Potential Dependence of the Electron Transfer Rate across a Single-Microdroplet/Water Interface
Authors: Chikama Katsumi , Nakatani Kiyoharu , Kitamura Noboru 
Published: March 2006

Abstract
An electron transfer (ET) reaction between ferrocene in a single oil droplet and hexacyanoferrate (III) in the surrounding water phase was investigated by laser trapping, spectroscopic, and electrochemical techniques. A droplet-size dependence of the ET reaction was studied as a function of a Galvani potential difference (Δ0WΦ) between the droplet and water phases. The ET rate was shown to be highly dependent on Δ0WΦ.
1,5-Ph3Ge and 1,6-Bu3Sn Group Transfer from Enoxy Oxygen to Alkoxy Oxygen
Authors: Kim Sunggak , Do Jung Yun , Lim Kwang Min 
Published: March 2006

Abstract
1,5-Ph3Ge and 1,6-Bu3Sn group transfer from enoxy oxygen to alkoxy oxygen are observed in radical reaction of keto epoxides and keto oxetanes, respectively.
Diastereoselective Reduction of Hemiacetals Derived from 2,3-O-Isopropylidene Derivatives of Carbohydrate Lactones
Authors: Jiang Shende , Singh Gurdial , Wightman Richard H 
Published: March 2006

Abstract
Reactions of organomagnesium and/or organolithium reagents with 2,3-O-isopropylidene-d-erythronolactone and 5-O-tert-butyldiphenylsily1-2,3-O-isopropylidene-d-ribonolactone gave good yields of the corresponding hemiacetals which, by choice of hydride reagents, can be reduced stereoselectively to give products with a syn-(threo-) relationship between the new chiral centre and that at C-2 of the lactone.
Highly Z Selective Synthesis of Functionalized Monoterpenoids via N-Ylide [2,3]Sigmatropic Rearrangement and Its Application to 13-cis-Retinol
Authors: Honda Kiyoshi , Yoshii Ichiro , Inoue Seiichi 
Published: March 2006

Abstract
Highly stereoselective elongation of a functionalized E isoprene unit on the Z terminal methyl of prenol was achieved by the N-ylide rearrangement of N-tiglyl-β-methallyldimethyl ammonium salt. (E,Z)-Rearrangement product was converted into 13-cis-retinol via useful conjugated triene isoprenoid synthon.
Magnetic Field Effects on the Current Oscillations in Anodic Zinc Dissolution
Authors: Mogi Iwao , Kikuya Hiroshi , Watanabe Kazuo , Awaji Satoshi , Motokawa Mitsuhiro 
Published: March 2006

Abstract
In order to investigate the magnetic field effects on chemical feedback systems, the oscillation behavior of the anodic currents of a zinc electrode was studied in an 8 mol dm−3 NaOH aqueous solution under magnetic fields using a liquid-helium-free large-bore superconducting magnet.
Synthesis and Property of Planar-chiral Cyclopentadienyl-ruthenium Complexes
Authors: Komatsuzaki Nobuko , Uno Mitsunari , Kikuchi Hidetoshi , Takahashi Shigetoshi 
Published: March 2006

Abstract
The first enantiomerically pure planar-chiral cyclopentadienyl-ruthenium complexes, [CpnRu(benzene)]PF6, were synthesized (CpnH; unsymmetricaly trisubstituted cyclopentadiene), and by a photo reaction with CH3CN converted to [CpnRu(CH3CN)3]PF6, which was transformed into planar-chiral [CpnRu(arene)]PF6 by a ligand exchange reaction.
Light Emitting Properties of Linear π-Conjugated Poly(arylene)s
Authors: Yamamoto Takakazu , Lee Bang-Lin , Saitoh Yutaka , Inoue Tetsushi 
Published: March 2006

Abstract
Dichroism of photoluminescence PL of linear poly(2,3-di-p-tolylquinoxaline-5,8-diyl) indicates that the PL has a transition moment along the direction of the polymer main chain and an energy transfer takes place in the polymer. Poly(phenanthroline-3,8-diyl) and poly(pyridine-2,5-diyl) give analogous results and show a strong tendency to give excimer-type emission in both PL and electroluminescence.
Absorption of Uric Acid Derivatives in Water by Poly(vinyldiaminotriazine) through Hydrogen Bonding
Authors: Asanuma Hiroyuki , Gotoh Sumie , Ban Takeshi , Komiyama Makoto 
Published: March 2006

Abstract
In aqueous solutions, poly(2-vinyl-4,6-diamino-1,3,5-triazine) efficiently absorbs uric acid, xanthine, and theobromine by using three complementary hydrogen bonds. The adsorption is selective and reversible, indicating a strong potentiality for the practical application.
Synchronized Fluorine Exchange with Ring Inversion of Pentafluoro-1,4,-disilacyclohexane Anion
Authors: Hoshi Takashi , Takahashi Masae , Kira Mitsuo 
Published: March 2006

Abstract
A new intramolecular fluoride-ion donor-acceptor system, pentafluoro-1,4-disilacyclohexane anion showed an unusually rapid intramolecular intersilicon fluoride-ion exchange synchronized with ring inversion.
Hydrolysis of Nucleotides Using Actinoid Metal Ion
Authors: Ihara Toshihiro , Shimura Hitoshi , Ohmori Kazuhiro , Tsuji Hiroshi , Takeuchi Jun , Takagi Makoto 
Published: March 2006

Abstract
Hydrolysis of phosphomonoester and phosphodiester bonds of dpC, dCp, and dCpC were markedly accelerated in the presence of Th4+ in acidic (pH 4 and 5) aqueous solution; this effect surpassed those of other metal ions that were hitherto known as metals having catalytic activity for organic phosphoester (Ce3+, La3+, Cu2+).
Efficient TiO2 Powder and Film Photocatalysts with Rutile Crystal Structure
Authors: Sopyan Iis , Watanabe Mitsuru , Murasawa Sadao , Hashimoto Kazuhito , Fujishima Akira 
Published: March 2006

Abstract
Efficient TiO2 powder and film photocatalysts with the rutile structure were prepared. Their photocatalytic properties were assessed by measuring the photooxidative decomposition of gaseous acetaldehyde. The rutile powder showed much higher photoactivity than Degussa P-25 powder, both in degradation rate and in quantum efficiency. Moreover, the rutile film prepared by sintering the rutile sol at 450 °C also showed rather high photocatalytic activity.
Palladium-Catalyzed Dehalogenative Germylation of Allylic Halides with Triethlygermyltributylstannane at Room Temperature
Authors: Nakano Taichi , Ono Kazuyoshi , Migita Toshihiko 
Published: March 2006

Abstract
Triethlygermyltributylstannane was found to react with allylic halides at room temperature in the presence of a catalytic amount of Pd2(dba)3CHCl3 to bring about regioselective dehalogenative germylation giving 2-alkenyltriethylgermanes in good yields. Using triphenylphosphine as a ligand of the palladium caused to slow the rate of the present reaction.
Photochromic Behavior in the Molecular Glass of 4,4′,4″-Tris(3-methylphenylphenylamino)triphenylamine
Authors: Nakano Hideyuki , Akamatsu Keiichi , Moriwaki Kazuyuki , Shirota Yasuhiko 
Published: March 2006

Abstract
For the purpose of gaining information on the microstructure of molecular glasses, photochromic behavior of 4-dimethylaminoazobenzene (DAAB) in the molecular glass of 4,4′,4″-tris(3-methylphenylphenylamino)triphenylamine (m-MTDATA) was studied in comparison with that in a polystyrene matrix and in a benzene solution. The results strongly suggest that the local free volume in the molecular glass of m-MTDATA is smaller than that in the polystyrene glass.
Methylene Insertion Reactions of Samarium Carbenoids into Boron–Hydrogen and Phosphorus–Hydrogen Bonds
Authors: Imamoto Tsuneo , Yamanoi Yoshinori 
Published: March 2006

Abstract
A samarium carbenoid, generated from diiodomethane and samarium metal, reacts with phosphine–boranes to afford phosphine–monomethylborane in good yields. The P–H bonds of secondary phosphine–boranes or secondary phosphine oxides are subjected to methylene insertion with the same carbenoid to give the corresponding P-methylated derivatives.
Catalytic Effect of Ag+ in Colloidal CdS-Induced Photooxidation of Aniline
Authors: Kumar Anil , Kumar Sanjay 
Published: March 2006

Abstract
The efficiency of colloidal CdS-induced oxidation of aniline is enhanced by doping Ag+. The luminescence of CdS particles containing low Ag+ is quenched by added aniline. At high concentrations of Ag+ (≥10%) no quenching of emission is observed. It is understood by the formation of Ag2S phase on the surface of CdS particles which prevents photogenerated holes to interact with the adsorbed aniline. The catalytic action of Ag+ is attributed to the efficient charge transfer at CdS-Ag2S interface upon irradiation to the adsorbed redox species.
In situ UV-visible Spectral Detection of a Molybdenum Dioxygen Porphyrin Complex Formed in the Solid State Process
Authors: Osada Mai , Tachibana Junichi , Imamura Taira , Sasaki Yoichi 
Published: March 2006

Abstract
Reversible dioxygenation reaction of a molybdenum(IV) porphyrin, MoIVO(tmp), in the solid state with dioxygen, was confirmed directly by in-situ UV-vis spectral measurements.
A Raman Spectroscopic Study of Merocyanine Aggregates of a 15N-Isotopomer of 6-Nitro-1′,3′,3′-trimethylspiro[2H-1-benzopyran-2,2′-indoline]. A Direct Evidence for the Association through the NO2-Bridges
Authors: Sato Hiroyasu , Matsuzaki Akiyoshi , Nishio Satoru , Yoshimi Motohiro , Yamamoto Katsutoshi , Tomioka Hideo 
Published: March 2006

Abstract
A Raman spectroscopic study on large-sized merocyanine aggregates prepared by the irradiating a 15NO2-isotopomer of 6-nitro-1′,3′,3′-trimethylspiro[2H-1-benzopyran-2,2′-indoline] (6-nitro BIPS) with UV light in a cyclohexane solution strongly indicates the association of merocyanine monomers through the NO2-bridges.
Uniformly Sized Polymer Based Stationary Phase Having Multi-Chiral Selectors
Authors: Yoshizako Kimihiro , Shirasu Yuichi , Hosoya Ken , Kimata Kazuhiro , Araki Takeo , Tanaka Nobuo 
Published: March 2006

Abstract
Uniformly sized polymer based HPLC stationary phase having multi-chiral selectors was prepared through a combination of molecular imprinting technique and in situ surface modification technique. Interestingly, a simple additivity of chiral recognition abilities of each chiral selectors was observed. Size exclusion chromatography revealed a possible cause for the selectivity.
Heterogeneous Catalysis of the Friedel-Crafts Alkylation by Doped Natural Phosphate and Tricalcium Phosphate
Authors: Sebti Saïd , Rhihil Abdallah , Saber Ahmed 
Published: March 2006

Abstract
Catatytic behavior has been observed for tricalcium phosphate and either copper or zinc chloride doped natural phosphate for the Friedel-Crafts reaction. Monoalkylation has been quantitatively achieved with high selectivity.
The Volume and Compressibility Changes Associated with Protein Denaturation
Authors: Hayashi Tomohiro , Sakurai Masao , Nitta Katsutoshi 
Published: March 2006

Abstract
The changes in the apparent specific volume and apparent specific adiabatic compressibility associated with thermal and chemical denaturations were studied for hen egg white lysozyme solution. No transition was found in the temperature dependence of the apparent quantities, whereas the addition of a certain amount of guanidine hydrochloride seems to decrease slightly the volume and compressibility.
Stereoselective Addition of Alcohol to Acetylenecarboxylate Catalyzed by Silver(I) Salt
Authors: Kataoka Yasutaka , Matsumoto Osamu , Tani Kazuhide 
Published: March 2006

Abstract
A silver(I) salt catalyzed the stereoselective trans addition of alcohol to dimethyl acetylenedicarboxylate smoothly under mild conditions to afford dimethyl methoxyfumarate in a quantitative yield.
Electrochemical Characterization an Assembled Monolayer of α-Methoxy-ω-mercapto-poly(ethylene glycol) on Gold and Complex Formation of the Monolayer with α-Cyclodextrin
Authors: Nakashima Naotoshi , Miyata Yujiro , Tominaga Masato 
Published: March 2006

Abstract
Assembled monolayers of α-methoxy-ω-mercapto-poly(ethylene glycol) on gold were found to provide unique microenvironments for the electrochemistry of small molecules and a heme protein and to form a two-dimensional supramolecular complex with α-CD on the metal electrode surfaces.
Synthesis of GLA-60 Positional Isomer as an LPS-Agonist and Its Activity
Authors: Shiozaki Masao , Arai Masami , Macindoe Wallace M , Mochizuki Takashi , Kurakata Shin-ichi , Maeda Hiroaki , Nishijima Masahiro 
Published: March 2006

Abstract
Compound 10 was synthesized from β-d-glucose pentaacetate in a stereocontrolled manner. It unexpectedly showed LPS-agonistic activity much stronger than that of GLA-60 toward human monoblastic U937 cells in the TNFα production.
Enantioselective Borohydride Reduction of Ketones Catalyzed by Optically Active Cobalt(II) Complexes: Achievement of High Enantioselection by Modified Borohydrides with Furfuryl Alcohol Derivatives
Authors: Sugi Kiyoaki D , Nagata Takushi , Yamada Tohru , Mukaiyama Teruaki 
Published: March 2006

Abstract
The enantioselective borohydride reduction of ketones catalyzed by optically active (β-oxoaldiminato) cobalt(II) complexes was remarkably improved by using the borohydride which was modified with furfuryl alcohol dervatives and ethanol. In the presence of 1 mol% of the above complex catalysts, asymmetric reduction of aromatic ketones proceeded smoothly to give the corresponding optically active alcohols in quantitative yields within 6–12 h with high enantiomeric excesses (90–97% ee).
Isoplagiochins C and D, New Type of Macrocyclic Bis(bibenzyls), Having Two Biphenyl Linkages from the Liverwort Plagiochila fruticosa
Authors: Hashimoto Toshihiro , Kanayama Shigeru , Kan Yukiko , Tori Motoo , Asakawa Yoshinori 
Published: March 2006

Abstract
Two new type of macrocyclic bis(bibenzyls) named isoplagiochins C (1) and D (2) have been isolated from the liverwort Plagiochila fruticosa, and their structures established by a combination of two dimension NMR spectra and chemical degradation.
Stepwise Elongation of a Trinuclear Ruthenium Unit in Pyrazine-Bridged Linear Oligomers with Use of [Ru3(μ3-O)(μ-CH3COO)6(pyridine)(CO)(H2O)]
Authors: Kido Hiroaki , Nagino Haruko , Ito Tasuku 
Published: March 2006

Abstract
The synthetic method for the stepwise Ru3 unit elongation of pyrazine-bridged linear oligomer of trinuclear ruthenium complex with the Ru3(μ3-O)(μ-CH3COO)6 core has been developed, using a newly designed [Ru3(μ3-O)(μ-CH3COO)6(py)(CO)(H2O)] (py = pyridine) with labile and photoactive sites.
A Versatile Cycloaddition for the Generation of Pyrrolidine Derivatives via C–N–C 1,3-Dipoles
Authors: Torii Sigeru , Okumoto Hiroshi , Genba Akiko 
Published: March 2006

Abstract
The condensation of N-(trimethylsilylmethyl)benzylamine and aldehydes spontaneously gave azomethine ylides, which react with electron deficient olefins to yield cycloadducts under mild conditions.
Characterization of CeO2 Ultrafine Particles Prepared Using a Thermal Relaxation Technique
Authors: Masui Toshiyuki , Machida Ken-ichi , Sakata Takao , Mori Hirotaro , Adachi Gin-ya 
Published: March 2006

Abstract
Cerium(IV) oxide ultrafine particles were prepared in a nylon 11 matrix through a relaxative auto-dispersion (RAD) process. High-resolution electron microscope (HREM) observations revealed that the lattice parameter and mean particle size of CeO2 ultrafine particles were 0.541 nm and 4.1 nm, respectively.
Efficient Photogeneration of Oxidizing (Compound II-like) Species of Semisynthetic Myoglobin Appending Ruthenium Tris(2,2′-bipyridine)
Authors: Hamachi Itaru , Tsukiji Shinya , Tanaka Shigeaki , Shinkai Seiji 
Published: March 2006

Abstract
An efficient photogeneration method for an oxidizing active species of semisynthetic myoglobin bearing ruthenium tris(2,2′-bipyridine) (Ru(bpy)3) through intramolecular electron abstraction is described.
A Molecular Antiferromagnet TMTSF·FeCl4
Authors: Kumai Reiji , Asamitsu Atsushi , Tokura Yoshinori 
Published: March 2006

Abstract
A semiconducting organic radical cation salt with a magnetic anion, TMTSF·FeCl4 (ρrt = 40 Ωcm), was prepared. The crystal undergoes an antiferromagnetic ordering below TN = 4 K with the easy axis perpendicular to the TMTSF stacking direction. X-ray crystallographic analysis reveals that Cl atoms of the anions closely contact with Se atoms of the donor molecules and suggests that the spin ordering is mediated by magnetic interaction between donors and anions.
Synthesis of Binuclear Palladium(II) Complexes of Bidentate N(21),N(22)-Bridged Porphyrins
Authors: Takao Yuko , Takeda Tokuji , Miyashita Keiko , Setsune Jun-ichiro 
Published: March 2006

Abstract
N(21),N(22)-(etheno)-bridged porphyrins were metallated with PdCl2 to give binuclear porphyrin complexes with (μ-dichloro)dipalladium(II) structure in which the terminal PdCl2 moiety is coming close to the porphyrin plane.
Far-Wing Excitation Spectra of the Hg 6s6p 3P0 – 6s7s 3S1 Inter-Excited-State Transitions Broadened by Ar and Ne
Authors: Ohmori Kenji , Amano Kazuhiro , Okunishi Misaki , Chiba Hisashi , Ueda Kiyoshi , Sato Yukinori 
Published: March 2006

Abstract
We have measured the laser-excitation spectra of the Hg–Ar and Hg–Ne collisional quasimolecules in the far wings of the Hg 6s6p 3P0 – 6s7s 3S1 inter-excited-state transitions broadened by Ar and Ne. The simulation of the spectrum, based on an uniform-semiclassical treatment for the free-free Franck-Condon factor, has been carried out for the Hg–Ar system in order to estimate the potential curves for the E31 and a 30− states of the quasimolecule.
Synthesis and Crystal Structures of Thiolate-Bridged Diruthenium Complexes Containing Two Olefinic Ligands
Authors: Qü Jing-Ping , Matsuzaka Hiroyuki , Ishii Youichi , Hidai Masanobu 
Published: March 2006

Abstract
A series of thiolate-bridged dinuclear ruthenium complexes containing two electron-deficient olefinic ligands [Cp*Ru(μ-SR)2(η2-C2H3R′)2RuCp*] (R = Pri, Et, 2,6-C6H3Me2 or 2,4,6-C6H2Me3; R′ = CN, COOMe or CHO) have been synthesized from Ru(II)-Ru(II), Ru(II)-Ru(III) and/or Ru(III)-Ru(III) precursors, three of which have been characterized by X-ray structural analysis.
Circular Dichroism of an Aromatic Guest Induced by a Chiral Steroid Cyclophane in Aqueous Solution and Synthetic Bilayer Membrane
Authors: Kikuchi Jun-ichi , Ogata Toshiyuki , Inada Masahiko , Murakami Yukito 
Published: March 2006

Abstract
A steroid cyclophane, having l-lysine residues interposed between a tetraaza[6.1.6.1]paracyclophane skeleton and four cholate moieties, furnished a chiral binding site for a hydrophobic aromatic guest in a synthetic bilayer membrane as well as in aqueous solution, as evidenced by induced circular dichroism.
Enhanced Luminescence of Eu(III) by La(III), Gd(III), Tb(III) and Y(III) in Langmuir-Blodgett Films of Mixed Rare Earth Complexes
Authors: Zhong Guolun , Feng Yu , Yang Kongzhang , Zhu Guiyun 
Published: March 2006

Abstract
Four kinds of LB films containing 0.5%Eu(TTA)3Phen + 99.5%RE(TTA)3Phen (in molar percentage; RE = La(III), Gd(III), Tb(III) and Y(III)) mixed with arachidic acid (AA) in molar ratio of 1:1 were fabricated. The luminescent enhancement effect of RE(TTA)3Phen on Eu(III) was studied. The influence of rare earth ions on the efficiency of the intermolecular energy transfer in films was discussed. When the complexes of Tb(III) and Gd(III) coexist with Eu(TTA)3Phen, the efficiency of energy transfer is higher than that of the complexes of La(III) and Y(III).
Discrimination of Albumin and Lysozyme-Adsorption Characteristics on Two Differently-Originated Apatites
Authors: Akazawa Toshiyuki , Kobayashi Masayoshi , Kanno Tohru , Kodaira Kohei 
Published: March 2006

Abstract
Two kinds of hydroxyapatite (HAp) originated from cattle bones and reagents displayed different adsorption behavior of albumin on the C-sites and lysozyme on the P-sites of the HAp surface, which was strongly influenced by the basic strength of the C-sites and the acid strength of the P-sites as well as the total amount or surface proportion of the two sites, depending on the heat-treatment temperature of the HAp’s.
Design, Synthesis, and Electrochemical Behavior of New Electronic Systems Involving σ,σ- and σ,π-Interaction
Authors: Nishiwaki Keiji , Yoshida Jun-ichi 
Published: March 2006

Abstract
1,2-Bis(trimethylsilyl)-1,2-diphenylethane and its homologues were synthesized and the studies on their electochemical behavior revealed that there is definite interaction between the σ,π-interaction system (the C-Si bonds and the benzene rings) and the σ,σ-interaction system (the neighboring C-Si bonds) which causes significant decrease of the oxidation potentials.
Irreversible Inactivation of Serine Proteases by Peptidyl α,β-Unsaturated Nitro Compounds
Authors: Ohba Tsuyoshi , Takei Hisashi 
Published: March 2006

Abstract
Peptidyl α,β-unsaturated nitro compounds were found to be active-site directed irreversible inhibitors of serine protease, α-chymotrypsin. The inactivation was selective because tripeptidyl derivative 4 did not show any irreversible inhibitory activity toward another serine protease, procine pancreatic elastase.
Trityl Salt Catalyzed Stereoselective Glycosylation of Alcohols with 1-Hydroxyribofuranose
Authors: Uchiro Hiromi , Mukaiyama Teruaki 
Published: March 2006

Abstract
In the presence of a catalytic amount of several trityl salts, 2,3,5-tri-O-benzyl-d-ribofuranose smoothly reacted with alcohols to give various β-ribofuranosides in high yields with high stereoselectivity while reversed stereoselectivity was observed in the coexistence of lithium perchlolate.
Tetrabutylammonium Fluoride Promoted Regiospecific Reactions of Trimethylsilyl-o-Carborane with Aldehydes
Authors: Cai Jianping , Nemoto Hisao , Nakamura Hiroyuki , Singaram Bakthan , Yamamoto Yoshinori 
Published: March 2006

Abstract
Trimethylsilyl-o-carborane serves as o-carborane carbanion upon fluoride ion promoted reaction with carbonyl compounds. Thus, in the presence of tetrabutylammonium fluoride, trimethylsilyl-o-carborane undergoes facile, unprecedented, carbodesilylation with aromatic and aliphatic aldehydes.
Strand Ligation in a Double-stranded DNA by T4 RNA Ligase
Authors: Kinoshita Yasunori , Nishigaki Koichi , Husimi Yuzuru 
Published: March 2006

Abstract
T4 RNA ligase was shown to ligate two DNA strands contained in a double helix with a high efficiency. Experiments on substrate and temperature dependence of this reaction supported that single-stranded ends clamped by a double-stranded region are necessary for this reaction. This finding is widely useful for DNA joining.
A Cyclodextrin Derivative with Cation Carrying Ability: Heptakis(3,6-anhydro)-β-cyclodextrin 2-O-p-Phenylazobenzoate
Authors: Yamamura Hatsuo , Kawai Hirotake , Yotsuya Tadahiro , Higuchi Tamotsu , Butsugan Yasuo , Araki Shuki , Kawai Masao , Fujita Kahee 
Published: March 2006

Abstract
A cation-complexing host, heptakis(3,6-anhydro)-β-cyclodextrin, was converted to a mono-p-phenylazobenzoyl derivative, which exhibited alkali metal-carrying ability in CH2Cl2-H2O system.
Metal-induced Aggregation-deaggregation Equilibrium Change in Calix[4]arene-appended Bisfullerenes
Authors: Ikeda Atsushi , Shinkai Seiji 
Published: March 2006

Abstract
A calix[4]aryl ester containing two C60 groups changed the absorption spectra (and thus its visible color) upon changing the solvent from chloroform to chloroform : acetonitrile = 1 : 1 v/v or adding NaClO4. The spectroscopic and light-scattering studies established that the unique behaviors can be rationalized in terms of an aggregation-deaggregation equilibrium change.