bluuebunny/crossref_metadata_2025_split huggingface dataset:
Zustandsermittlung und Schadensdiagnose für Parkhäuser mit automatisierten zerstörungsfreien Prüfverfahren
Authors: Stoppel Markus , Taffe Alexander , Reichling Kenji , Kurz Jochen 
Published: September 2009

AbstractVerkehrsbauwerke sind oft besonders widrigen Umgebungsbedingungen ausgesetzt. Dies gilt besonders für Parkhäuser und ‐garagen. Zu einer hohen Chloridbelastung, mechanischer Beanspruchung und Frost‐Tauwechsel Beanspruchung kommen gerade bei Bauwerken aus den 1970er und 1980er Jahren baulich bedingte Schwachstellen wie zu geringe Betondeckung, unzureichende Entwässerungsvorrichtungen, fehlende Abdichtungen und schlecht nachbehandelter Beton an der Oberfläche. Erschwerend kommt hinzu, dass nicht alle Schäden visuell von außen erkennbar sind. Für solche Bauwerke muss der sachkundige Planer zusammen mit dem Bauherren wichtige Entscheidungen treffen. Lohnt eine Instandsetzung? Wenn ja, wie umfangreich muss sie sein, damit sie auch dauerhaft ist? Wie stark ist die Konstruktion geschädigt? Die Fragen müssen zuverlässig beantwortet werden, um eine bedarfsgerechte Instandsetzung sicherzustellen. Dazu hat sich die Kombination verschiedener zerstörungsfreier Verfahren als sinnvoll erwiesen. So werden an jedem Messpunkt eines umfangreichen Messrasters am Bauwerk Messwerte verschiedener Verfahren im Sinne ergänzender Untersuchungen aufgezeichnet. Zur Beantwortung der Frage, ob an einer Stelle tatsächlich mit Korrosion zu rechnen ist, werden z. B. die Messwerte der Potentialfeldmessung mit Betondeckungsmessungen und Feuchtemessungen kombiniert. Um die Kombination solcher Verfahren in einem ausreichend dichtem Messraster und dennoch schnell durchführen zu können wird in dem Beitrag über ein selbstnavigierendes Robotersystem berichtet, das modular mit bis zu sechs Verfahren bestückt ist und um weitere Verfahren erweitert werden kann. Bei der Darstellung der Ergebnisse wurde besonders darauf geachtet, diese für großflächige Bereiche so darzustellen, dass eine vergleichende Betrachtung möglich ist.
Ligand‐Centred Reactivity of Bis(picolyl)amine Iridium: Sequential Deprotonation, Oxidation and Oxygenation of a “Non‐Innocent” Ligand
Authors: Tejel Cristina , del Río M. Pilar , Ciriano Miguel A. , Reijerse Eduard J. , Hartl František , Záliš Stanislav , Hetterscheid Dennis G. H. , Tsichlis i Spithas Nearchos , de Bruin Bas 
Published: September 2009

AbstractTreatment of [Ir(bpa)(cod)]+ complex [1]+ with a strong base (e.g., tBuO−) led to unexpected double deprotonation to form the anionic [Ir(bpa−2H)(cod)]− species [3]−, via the mono‐deprotonated neutral amido complex [Ir(bpa−H)(cod)] as an isolable intermediate. A certain degree of aromaticity of the obtained metal–chelate ring may explain the favourable double deprotonation. The rhodium analogue [4]− was prepared in situ. The new species [M(bpa−2H)(cod)]− (M=Rh, Ir) are best described as two‐electron reduced analogues of the cationic imine complexes [MI(cod)(Py‐CH2‐NCH‐Py)]+. One‐electron oxidation of [3]− and [4]− produced the ligand radical complexes [3]. and [4].. Oxygenation of [3]− with O2 gave the neutral carboxamido complex [Ir(cod)(py‐CH2‐N‐CO‐py)] via the ligand radical complex [3]. as a detectable intermediate.
An Unusual N‐Boc Deprotection of Benzamides under Basic Conditions
Authors: Yin Biaolin , Zhang Yuanxiu 
Published: September 2009

AbstractFor the first time, an unusal cleavage of N‐tert‐butyloxycarbonyl (N‐Boc) protection from N‐Boc‐protected benzamide under basic conditions in excellent yields is reported. The deprotection involves the N‐Boc emigration from the benzamide to form 2‐O‐Boc group followed by O‐Boc deprotection on the phenyl ring.
Novel Metal Oxide Support with Water Activation Ability for Use in Direct Methanol Fuel Cell
Authors: Wang Qingjing , Wei Ang , Zhao Xiaohui , Zhang Shuyong 
Published: September 2009

AbstractA new principle for designing catalyst supports with water activation ability was proposed. According to this principle, stabilized nickel(+3) oxides with different dopants were tested as possible support and promoter for Pt catalyst in direct methanol fuel cells. It was found that the chemical and electrochemical stabilities of these novel supports in acidic solution were sufficient. The support doped with Al(+3) has catalytic activity towards methanol electrooxidation while that doped with Co(+3) can improve both activity and poisoning tolerance of the Pt catalyst.
Antibacterial Properties of a Kind of Schiff Base and Its Neodymium(III) and Zn(II) Complex (ZnNdL) on Escherichia coli
Authors: Li Chaohong , Zhu Juncheng , Qi Zude , Hou Hanna , Hu Yanjun , Liu Yi 
Published: September 2009

AbstractThe microcalorimetric and electronic microscopy methods were used to study the antibacterial activity of a Schiff base and its complex ZnNdL on Escherichia coli. The metabolic power‐time curves of the bacteria treated with the compounds were obtained, and the thermokinetic parameters were analyzed. The results show that the compounds (H2L, ZnNdL) have good activity on aerobic multiplying metabolism of E. coli, with the values of IC50 57.0 and 54.4 mg·L−1, respectively. In order to further investigate their mechanism on E. coli, transmission electronic microscopy and scanning electronic micrography were used to study the cell membrane change induced by the dibasic quadridentate Schiff base and its neodymium(III) complex. At a low concentration of the compound, the flagellum was inhibited and the cell did not show distinct changes. However, the flagella around the cell membrane were exfoliated, the morphology of E. coli was changed from a rod shape into a spherical shape or a short rod, and the flagella disappeared completely at a high concentration. The drug permeability into cell membrane was investigated by fluorescence quenching of probe dis‐C3‐(5), which suggested that H2L and ZnNdL could influence on the intra and extra cell membrane.
Theoretical Studies on the Structures, Stabilities, Vibrational Spectra, and Thermodynamic Properties of Polynitromethylbenzenes
Authors: Wang Guixiang , Gong Xuedong , Liu Yan , Xiao Heming 
Published: September 2009

AbstractThe nitro derivatives of methylbenzenes were optimized to obtain their molecular geometries and electronic structures at the DFT‐B3LYP/6‐31G* level. The structure parameters, such as the C–NO2 bond length (L) and the least C–NO2 bond overlap population (M) were focused to predict their relative stability or sensitivity. Their IR spectra were obtained and assigned by vibrational analysis, which are reliable compared with the experimental results. Based on the frequencies scaled by 0.96 and the principle of statistic thermodynamics, the thermodynamic properties were evaluated, which are linearly related with the number of nitro and methyl groups as well as the temperature, obviously showing good group additivity.
Synthesis, Characterization and Thermodynamic Study of the Solid State Coordination Compound Ni(Nic)2·H2O(s) (Nic=Nicotinate)
Authors: Chen Jingtao , He Donghua , Di Youying , Kong Yuxia , Yang Weiwei , Dan Wenyan , Tan Zhicheng 
Published: September 2009

Abstract A novel compound‐monohydrated nickel nicotinate was synthesized by the method of room temperature solid phase synthesis and ball grinder. FTIR, chemical and elemental analysis, TG/DTG, and X‐ray powder diffraction technique were applied to characterize the structure and composition of the coordination compound. Low‐temperature heat capacities of the solid coordination compound have been measured by a precision automated adiabatic calorimeter over the temperature range from 78 to 386 K. A solid‐solid phase transition occurred in the temperature range of 328–358 K in the heat capacity curve, and the peak temperature, the molar enthalpy and molar entropy of the phase transition were determined to be Ttrs=(356.759±0.697) K, ΔtrsHm=(13.650±0.408) kJ·
mol−1, and ΔtrsSm= (38.279±0.086) J·K−1·mol−1, respectively. The experimental values of the molar heat capacities in the temperature ranges of 78–328 K and 358–386 K were fitted to two polynomials, respectively. The polynomial fitted values of the molar heat capacities and fundamental thermodynamic functions of the sample relative to the standard reference temperature 298.15 K were calculated and tabulated at the intervals of 5 K.
Immersion Deposition of Pt Nanoparticles on Porous Silicon for Methanol Oxidation
Authors: Su Xu , LÜ Kangle , Chang Yanlong , Zhang Yan , Wang Chunming 
Published: September 2009

AbstractPorous silicon (PS) was chosen as the substrate for supporting the Pt particles because of great surface area, good conductivity and stability. Pt nanoparticles have been successfully prepared on the substrate by immersion deposition, which is convenient. The component and morphological properties of the films have been investigated by means of X‐ray diffraction (XRD), energy dispersive X‐ray spectroscopy (EDX) and scanning electron microscopy (SEM), which shows that the Pt particles have small size and big specific surface. Cyclic voltammetry (CV) research showed that the Pt nanoparticles had novel catalytic activity for methanol when the immersion deposition time was past 24 min.
Pervaporation Separation and Catalysis Activity of Novel Zirconium Silicalite‐1 Zeolite Membrane
Authors: Chen Pei , Chen Xinbing , Chen Xiangshu , An Zhongwei , Kita Hidetoshi 
Published: September 2009

AbstractNovel zirconium silicalite‐1 zeolite membrane was hydrothermally prepared on the mullite porous support at 150–185°C for 40–72 h by an "in situ" method using tetraethyl orthosilicate (TEOS), zirconium butoxide (ZBOT) and tetrapropylammonium hydroxide (TPAOH) as silica source, zirconium source and organic structure directing agent, respectively. X‐ray diffraction (XRD) patterns, fourier transformed infrared (FT‐IR) spectra, and inductively coupled plasma‐atomic emission spectrometry (ICP) of the accompanying zeolite powder confirmed that the zirconium was isomorphously incorporated into the zeolite framework. The surface chemical compositions of the obtained membrane were measured with an energy‐dispersive X‐ray spectral analyzer (EDS), and the membrane morphologies were observed by a scanning electron microscope (SEM). The results showed that the zeolite crystals growing on the support were zirconium silicalite‐1 zeolites, and the dense membrane layer was composed of the well inter‐growing zeolite crystals. The zirconium silicalite‐1 zeolite membrane, which was derived from the synthesis solution having a molar ratio of 1.00SiO2:0.01ZrO2:0.17TPAOH:120H2O, showed high ethanol permselectivity with a flux of 1.01 kg/(m2·h) accompanied with a separation factor of 73 for ethanol/water (5/95, w/w) system under a pervaporation condition at 60°C. Moreover, this membrane displayed pervaporation‐aided catalysis activity for iso‐propanol oxidation with hydrogen peroxide as oxidant, and the corresponding iso‐propanol conversion was 35%.
Syntheses, Structure Analyses and Thermal Stabilities of Two Schiff Base Metal Complexes
Authors: Zhang Yinli , Chen Sanping , Fan Guang , Zhao Zhijie , Gao Shengli 
Published: September 2009

AbstractA Schiff base ligand 1‐salicylideneamino‐1,3,4‐triazole (L) was prepared. Two new complexes with Schiff base, [Zn(L)2(SCN)2] (1) and [Co2(L)5(SCN)4]·H2O (2) have been synthesized and structurally characterized. Complex 1 takes a mononuclear zinc structure and the coordination geometry of zinc atom exhibits a distorted tetrahedron, in which a zig‐zag chain is constructed through hydrogen bonding interactions. A 2D supramolecular network is formed through Π‐Π stacking between triazole planes and phenyl planes of adjacent chains, and a 3D supramolecular network is further constructed by these non‐covalent Π‐Π stacking interactions between the triazole planes of neighboring layers. Complex 2 takes a dinuclear structure with the bidentate‐bridging Schiff base ligands, and cobalt site exhibits a distorted octahedron. The lattice water molecules and neutral complex 2 units form a dimer with hydrogen bonding interactions. In addition, IR and thermal gravimetric analysis are presented.
Microwave Assisted Efficient Synthesis and Crystal Structures of O‐Hexadecalkylated Pyrogallol[4]arenes
Authors: Chen Jiao , Chen Weifeng , Yan Chaoguo 
Published: September 2009

AbstractUnder microwave irradiation alkylation reactions of sixteen phenolic hydroxyl groups in tetra(p‐hydroxyphenyl)pyrogallol[4]arene with alkylating reagents such as n‐butyl iodide, benzyl chloride, and ethyl α‐chloroacetate were finished quickly in one step to give the fully O‐alkylated products. The X‐ray single crystal diffraction showed that the three peralkylated pyrogallol[4]arenes existed in rctt (cis‐trans‐trans) configuration.
Reactions of Cyclohexyl Isocyanide with η5‐Substituted Cyclo‐pentadienyl MoMo Triply Bonded Complexes. Crystal Structure of [Mo(CO)2(η5‐C5H4CO2CH3)]2(μ‐η2‐CNC6H11)
Authors: Li Qingshan , Luo Chuncheng , Song Licheng 
Published: September 2009

AbstractReactions of one or two equiv. of cyclohexyl isocyanide in THF at room temperature with MoMo triply bonded complexes [Mo(CO)2(η5‐C5H4R)]2 (R=COCH3, CO2CH3) gave the isocyanide coordinated MoMo singly bonded complexes with functionally substituted cyclopentadienyl ligands, [Mo(CO)2(η5‐C5H4R)]2(μ‐η2‐CNC6H11) (1a, R=COCH3; 1b, R=CO2CH3) and [Mo(CO)2(η5‐C5H4R)(CNC6H11)]2 (2a, R=COCH3; 2b, R=CO2CH3), respectively. Complexes 1a, 1b and 2a, 2b could be more conveniently prepared by thermal decarbonylation of MoMo singly bonded complexes [Mo(CO)3(η5‐C5H4R)]2 (R=COCH3, CO2CH3) in toluene at reflux, followed by treatment of the resulting MoMo triply bonded complexes [Mo(CO)2(η5‐C5H4R)]2 (R=COCH3, CO2CH3) in situ with cyclohexyl isocyanide. While 1a, 1b and 2a, 2b were characterized by elemental analysis and spectroscopy, 1b was further characterized by X‐ray crystallography.
DNA Binding and Cleavage Activity of Zinc(II) Complex of N,N′‐Bis(2‐guanidinoethyl)‐2,6‐pyridinedicarboxamide
Authors: Shao Ying , Ding Yong , Xu Weihong , Wei Li , Liu Fang , Lu Guoyuan 
Published: September 2009

AbstractThe interaction of zinc(II) complex of N,N′‐bis(guanidinoethyl)‐2,6‐pyridinedicarboxamide (Gua) with DNA was studied by CD spectroscopy and agarose gel electrophoresis analysis. The results indicate that the DNA binding affinity of Zn2+‐Gua is stronger than that of Gua and the Zn2+‐Gua can promote the cleavage of phosphodiester bond of supercoiled DNA under a physiological condition, which is ∼106 times higher than DNA natural degradation. The hydrolysis pathway was proposed as the possible mechanism for DNA cleavage promoted by the Zn2+‐ Gua. The acceleration is due to cooperative catalysis of the zinc cation center and the functional groups (bisguanidinium groups).
Stereoselective Synthesis of (Z)‐4‐(2‐Bromovinyl)benzene‐sulfonyl Azide and Its Synthetic Utility for the Transformation to (Z)‐N‐[4‐(2‐Bromovinyl)benzenesulfonyl]imidates
Authors: Zhang Wensheng , Kuang Chunxiang , Yang Qing 
Published: September 2009

AbstractA novel method for the stereoselective synthesis of (Z)‐4‐(2‐bromovinyl)benzenesulfonyl azide by simultaneous azidation and debrominative decarboxylation of anti‐2,3‐dibromo‐3‐(4‐chlorosulfonylphenyl)propanoic acid using NaN3 only was developed. Facile transformation of (Z)‐4‐(2‐bromovinyl)benzenesulfonyl azide to (Z)‐N‐[4‐ (2‐bromovinyl)benzenesulfonyl]imidates was also achieved by Cu‐catalyzed three‐component coulping of (Z)‐4‐(2‐bromovinyl)benzenesulfonyl azide, terminal alkynes and alcohols/phenols.
Gas Phase Conversion of Carbon Tetrachloride to Alkyl Chlorides Catalyzed by Supported Ionic Liquids
Authors: Sun Aijun , Zhang Jinlong , Li Chunxi , Meng Hong 
Published: September 2009

AbstractAn efficient way of converting carbon tetrachloride (CTC) to alkyl chlorides is reported, which uses the catalysts of ionic liquids supported on granular active carbon. The catalytic performance was evaluated in a temperature range of 120–200°C and atmospheric pressure for different ionic liquids, namely 1‐butyl‐3‐methylimidazolium chloride, 1‐octyl‐3‐methylimidazolium chloride, hydrochloric salts of N‐methylimidazole (MIm), pyridine and triethylamine, as well as bisulfate and dihydric phosphate of N‐methylimidazole. On this basis, the reaction mechanism was proposed, and the influences of the reaction temperature and the attributes of ionic liquids were discussed. The overall reaction was assumed to be comprised of two steps, the hydrolysis of CTC and reaction of HCl with alcohols under acidic catalyst. The results indicate that the conversion of CTC increased monotonically with temperature and even approached 100% at 200°C, while the maximum selectivity to alkyl chlorides was obtained around 160°C. This reaction might be potentially applicable to the resource utilization of superfluous byproduct of CTC in the chloromethane industry.
Apo‐CopC and CopC‐Cu(II) Unfolding Characteristics in GuHCl Solution
Authors: Li Huiqing , Zhao Yaqin , Yang Binsheng 
Published: September 2009

AbstractThe stability of CopC, a copper resistant protein with a Greek β‐barrel motif, in GuHCl solution was investigated by fluorescence spectra. Parameter A, characterizing position and shape of the fluorescence spectra, "phase diagram" method of fluorescence, and cupric binding capacity in GuHCl solution of different concentration showed that the denaturation transition of apo‐CopC and CopC‐Cu(II) might be fitted to a simple two‐state model. According to a two‐state model, the free energy of stabilization for apo‐CopC and CopC‐Cu(II), (17.08±0.35) and (23.81±0.45) kJ·mol‐1 respectively, was obtained. Copper(II) increased the stability of apo‐CopC. The higher thermodynamics stability of CopC‐Cu(II) was revealed to originate in both the faster folding and the slower unfolding rates by unfolding kinetics.
Solid Substrate Room Temperature Phosphorimetry for the Determination of Trace Mercury Based on the Reaction between Alkaline Phosphatase and Mercury Using Triton X‐100 as a Sensitizer
Authors: Liu Jiaming , Li Feiming , Lin Shaoqin , Li Zhiming , Chen Yayu , Lin Huiqing , Huang Lichai , Cai Jingping , Chen Xuejuan 
Published: September 2009

AbstractA new solid substrate room temperature phosphorimetry (SSRTP) for the determination of trace mercury has been established, using Triton X‐100 as a sensitizer. The regression equation of working curve was ΔIp=11.40m(Hg2+)+1.569 (ag·spot−1, n=6, ΔIp=Ip1−Ip2, Ip1 and Ip2 referred to the phosphorescence intensity of the blank reagent and the test solution, respectively), and correlation coefficient (r) was 0.9984. The RSD valus of the determination of 0.016 and 8.0 ag·spot−1 Hg2+ were 4.1% and 1.7% (n=8), respectively, indicating that the method had good repeatability. The limit of detection (LOD) calculated by 3Sb/k was 7.0 zg·spot−1 Hg2+ (corresponding concentration: 1.8×10−17 g·mL−1, Sb=0.025, n=11). This method has high sensitivity, selectivity and precision, which was applied to determination of trace mercury in water samples with the result being agreed very well with that of dithizone extraction spectrophotometry.
Uncatalyzed, One‐pot Synthesis of 3,3′‐(Benzylene)‐ bis(4‐hydroxy‐2H‐chromen‐2‐one) Derivatives under Thermal Solvent‐free Conditions
Authors: Shaterian Hamid Reza , Honarmand Moones 
Published: September 2009

AbstractA series of 3,3′‐(benzylene)bis(4‐hydroxy‐2H‐chromen‐2‐one) derivatives have been synthesized from condensation reactions of 4‐hydroxycoumarin with benzaldehydes under thermal solvent‐free conditions. This environmentally friendly synthesis is uncatalyzed and affords the desired products in excellent yields.
A Novel Catalytic Method for the Oxidation of Sulfides to Sulfoxides with Silica Sulfuric Acid and Sodium Nitrite in the Presence of KBr and/or NaBr as Catalyst
Authors: Goudarziafshar Hamid , Ghorbani‐choghamarani Arash , Nikoorazm Mohsen , Naserifar Zahra 
Published: September 2009

AbstractHighly efficient selective oxidation of sulfides to sulfoxides by NaNO2 and silica sulfuric acid catalyzed with KBr or NaBr has been reported. This oxidation was carried out in the presence of wet SiO2 (50% w/w) in acetonitrile at room temperature with good to excellent yields.
K2CO3‐Promoted Cascade Michael‐Alkylation Reactions: A Facile Preparation of Diethyl trans‐2,3‐Disubstituted 1,1‐Cyclopropanedicarboxylates
Authors: Yang Gaosheng , Hua Yuanyuan , Shen Yue 
Published: September 2009

AbstractA cascade Michael‐alkylation reaction of diethyl benzylidenemalonates with chloroacetophenones was realized by using K2CO3 as the promoter. With this method, a series of diethyl trans‐2,3‐disubstituted 1,1‐cyclopropane‐ dicarboxylates have been facilely synthesized in moderate yields under mild conditions. The relative configurations of two typical products were confirmed by X‐ray crystallographic analysis.
Synthesis and Crystal Structures of Two Complexes [Mn2(L)2(H2bta)2(H2O)]n and [Cu2(L)(H2bta)0.5(H2O)]n
Authors: Liu Ruiping , Yang Xuwu , Wang Lijun , Liu Fei , Zhang Lingling , Yu Fushan , Chen Sanping 
Published: September 2009

AbstractTwo new complexes, [Mn2(L)2(H2bta)2(H2O)]n (1) and [Cu2(L)(H2bta)0.5(H2O)]n (2) (H4bta=1,2,4,5‐benzene‐tetracarboxylic acid, L=imidazo[4,5‐f][1,10]phenathroline) were prepared under hydrothermal conditions and their structures determined by single‐crystal X‐ray diffration. The X‐ray diffraction reveals that complex 1, consisting of two crystallographically independent fragments A1 and A2, displays an interesting 3D supramolecular network constructed with ABAB sequence through hydrogen bonding interactions. In complex 2, the copper atoms connected by the H2bta2− ligands, the chains also are assembled into a 3D honeycomb configuration network formed by moleculars and aromatic π‐π stacking interactions.
Application of 1‐(2‐Pyridylazo)‐2‐naphthol Anchored SiO2 Nanoparticles for the Preconcentration of Trace Pb2+ from Different Water and Food Samples
Authors: Kaur Anupreet , Gupta Usha 
Published: September 2009

AbstractSiO2‐PAN nanoparticles has been synthesized by reacting silica nanoparticles with 3‐aminopropyltriethoxysilane, formaldehyde and 1‐(2‐pyridylazo)‐2‐naphthol and characterized by FT‐IR and SEM which were used as new sorbent for the preconcentration of trace amount of Pb2+ from various samples. Conditions of the analysis such as preconcentration factor, effect of pH, sample volume, shaking time, elution conditions and effects of interfering ions for the recovery of analyte were investigated. The adsorption capacity of the nanometer SiO2‐PAN was found to be 168.34 μmol/g at optimum pH and the detection limit (3δ) was 0.63 µg/L. The extractant showed rapid kinetic sorption. The adsorption equilibrium of Pb2+ on the nanometer SiO2‐PAN was achieved within 15 min. Adsorbed Pb2+ was easily eluted with 6 mL of 4 mol·L−1 hydrochloric acid. The maximum preconcentration factor was 50. The method was applied to determine trace amounts of Pb2+ in different samples (water and food samples).
A New Biindenylidenedione Compound with Two Azobenzene Units: Synthesis and Photochromic Behavior Both in Solution and in the Solid State
Authors: Liu Juyan , Han Jie , Wang Juanyu , Pang Meili , Meng Jiben 
Published: September 2009

AbstractA new photochromic biindenylidenedione compound bearing two azobenzene units was synthesized and characterized by means of 1H NMR, 13C NMR, ESI‐MS and elemental analysis. The photochromic and photo‐induced radical properties were investigated by means of UV‐Vis and electron spin resonance spectroscopy, respectively. The results showed that the title compound exhibited photochromic behavior with good fatigue resistances both in solution and in the solid state.