bluuebunny/crossref_metadata_2025_split huggingface dataset:
The [4+2]Cycloaddition of 2,3-Dimethylbutadiene to the Diselenido Ligand in the Dicationic Dinuclear Ruthenium Complexes
Authors: Sugiyama Hiroyasu , Watanabe Toshifumi , Matsumoto Kazuko 
Published: September 2002

Abstract
The dicationic diselenido-bridged dinuclear ruthenium complexes, [{Ru(P(OCH3)3)2(RCN)}2(µ-Se2)(µ-Cl)2]2+ (2: R = CH3, 3: R = C6H5) were prepared by the reactions of [{Ru- (P(OCH3)3)2Cl}2(µ-Se2)(µ-Cl)2] (1) with 2 equiv of Ag(I) salt under the presence of corresponding nitrile. Complexes 2 and 3 were trapped by 2,3-dimethylbutadiene to give [{Ru(P(OCH3)3)2-(RCN)}2{µ-SeCH2C(CH3)=C(CH3)CH2Se}(µ-Cl)2]2+ (4: R = CH3, 5: R = C6H5) carrying a C4Se2 six–membered ring.
Production of N-Acetyl-D-glucosamine from β-Chitin by Enzymatic Hydrolysis
Authors: Sashiwa Hitoshi , Fujishima Shizu , Yamano Naoko , Kawasaki Norioki , Nakayama Atsuyoshi , Muraki Einosuke , Aiba Sei-ichi 
Published: September 2002

Abstract
N-Acetyl-D-glucosamine, which is a focusing material for the improvement of osteoarthritis, was obtained from β-chitin by enzymatic hydrolysis in high yield (76%).
Highly Sensitive Optical Oxygen Sensing Material: Thin Silica Xerogel Doped with Tris(4,7-diphenyl-1,10-phenanthroline)ruthenium
Authors: Lee Sang-Kyung , Shin Yong Beom , Pyo Hyeon-Bong , Park Seon Hee 
Published: September 2002

Abstract
A highly sensitive optical sensor based on the luminescence quenching of tris(4,7-diphenyl-1,10-phenanthroline)ruthenium (II) complex (Rudpp) immobilized in a sol–gel-based thin silca xerogel was fabricated. Sensor material was prepared by entrapping it in chemically inert silica using the sol–gel process. The sensor showed good linearity from the modified Stern–Volmer plot. The dynamic response result demonstrated the fast response time of the sensor, less than 10 s. Largely enhanced photostability of the material was also one of the sensor’s most promising properties.
Visible Light-Induced Reversible Photomagnetism in Copper(II) Octacyanomolybdate(IV)
Authors: Ohkoshi Shin-ichi , Machida Naoko , Abe Yukinori , Zhong Zhuang J , Hashimoto Kazuhito 
Published: September 2002

Abstract
We report a visible light-induced reversible photomagnetism in CuII2[MoIV(CN)8]·8H2O (1). By the irradiation with a 480-nm laser light, the compound 1 showed a spontaneous magnetization with a magnetic ordering temperature (Tc) of 30 K. Conversely, the magnetization and Tc values were reduced by the irradiation with a 600-nm laser light. This photomagnetism is due to the reversible photo-induced electron transfer between paramagnetic 1 and its valence isomer exhibiting ferromagnetism.
The Synthesis of Optically Pure Enantiomers of N-Acyl-homoserine Lactone Autoinducers and Their Analogues
Authors: Ikeda Tsukasa , Kajiyama Koshiro , Kita Toshikazu , Takiguchi Noboru , Kuroda Akio , Kato Junichi , Ohtake Hisao 
Published: September 2002

Abstract
Optically pure enantiomers of N-acyl-homoserine lactones and thiolactones, whose optical purities were unambiguously determined by chiral stationary phase HPLC analyses, were firstly synthesized. Bioassays revealed that l-isomers were essential as the autoinducers in quorum sensing, while no effect was observed with d-isomers.
Structure and Magnetic Property of a Macrocyclic Tetranuclear Copper(II) Complex with Phenoxo- and Hydroxo-Bridges and Large and Small Cu–O–Cu Angles
Authors: Handa Makoto , Takemoto Toshikazu , Thompson Laurence K , Mikuriya Masahiro , Nagao Nobuyuki , Ikemi Shinichiro , Lim Jong-Wan , Sugimori Tamotsu , Hiromitsu Ichiro , Kasuga Kuninobu 
Published: September 2002

Abstract
Reaction of a macrocyclic ligand of 36-membered octaamino-tetraphenol with copper(II) triflate gave a tetranuclear complex with a large Cu–O(phenoxo)–Cu angle (130.8(1)°) and small Cu–O(phenoxo)–Cu (91.5(1)°) and Cu–O(hydroxo)–Cu angles (93.1(1)°). The magnetic behavior was interpreted based on the structural data.
Microscale Absorption Procedure for Simple and Rapid Gas–Liquid Extraction and Its Application to the Determination of Nitrogen Dioxide in the Atmosphere Coupled with Microflow Injection Analysis
Authors: Ma Lan , Oshima Mitsuko , Motomizu Shoji 
Published: September 2002

Abstract
A simple and miniaturized flow-through gas absorbing unit (GAU) using a small volume of an absorbing solution (0.5 mL) was developed and applied to the determination of nitrogen dioxide (NO2) in the atmosphere. The measuring method was coupled with a microflow injection analysis system (µFIA) for a small sample size consumption. The absorption efficiency of NO2 in the GAU was improved by packing hydrophobic poly(tetrafluoroethylene) (PTFE) particles in the unit, and by using a triethanolamine aqueous solution (TEA, 2 g/L) as an absorbing solution: absorption efficiency was increased up to more than 95%. The absorbed NO2 was converted to NO3− and NO2−. The molar ratio was ascertained to be 1:1 by measuring the concentrations of NO2− and NO3− in the absorbing solution using µFIA. Nitrogen dioxide at concentrations above 10 ppb in the atmosphere could be determined by the proposed method.
Magnetic Phase Transition between Ferromagnetic High-Temperature Phase and Antiferromagnetic Low-Temperature Phase in 5-Carboxy-2-thienyl Nitronyl Nitroxide
Authors: Sugano Tadashi 
Published: September 2002

Abstract
From the measurements of the temperature dependence of magnetization, a magnetic phase transition at 145 K with a thermal hysteresis is found for an organic radical 5-carboxy-2-thienyl nitronyl nitroxide. Ferromagnetic intermolecular interaction is observed in the high-temperature phase while antiferromagnetic interaction is obtained for the low-temperature phase.
Efficient Red Electroluminescence from New Europium Complex
Authors: Noto Mitsuharu , Irie Kazutaka , Era Masanao 
Published: September 2002

Abstract
Efficient red electroluminescence (EL) was performed in the organic electroluminescent device using emissive layer of a new Eu complex, which has 2,4-dioxopentanedinitrile (1,3-dicyano-1,3-propanedione, DCNP), 1,3-diphenyl-1,3-propanedione (dibenzoylmethane, DBM) and 1,10-phenanthroline (phen) (1:2:1) as ligands, doped into 2-(biphenyl-4-yl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (PBD) host; luminance, external quantum efficiency and power efficiency of the EL were 10 cd m−2, 3.5% and 2.0 lm W−1 at a current density of 0.17 mA cm−2, and 84 cd m−2, 1.6% and 0.69 lm W−1 at 2.9 mA cm−2.
Conversion of Dimethyl Ether to Diesel Fuel Additives via Dielectric Barrier Discharges
Authors: Jiang Tao , Liu Chang-jun , Fan Guo-liang 
Published: September 2002

Abstract
A high-efficient conversion of dimethyl ether (DME) to diesel fuel additives at ambient condition via dielectric-barrier discharges has been performed. The conversion of DME reaches a high value of 66.56% at a gas flow rate of 30 mL·min−1. The liquid obtained is a cetane number promoter of diesel fuels. The selectivity of liquid product is more than 40%.
Efficient and Homochiral Selective Oligomerization of Racemic Ribonucleotides on Mineral Surface
Authors: Urata Hidehito , Aono Chie , Ohmoto Norihiko , Shimamoto Yuko , Kobayashi Yoshiko , Akagi Masao 
Published: September 2002

Abstract
We have found that activated racemic mononucleotides oligomerize with comparable efficiency to chiral d-monomers on Na+-montmorillonite, and that the reaction proceeds in a homochiral selective manner to preferentially give optically homogeneous d- and l-oligomers. Mineral surfaces might play important roles in an early stage of chemical evolution of RNAs.
Template Synthesis and Characterization of ZnxCd1−xS Nanorod
Authors: Meng Zhaoyu , Peng Yiya , Chen Xinyu , Qian Yitai 
Published: September 2002

Abstract
ZnxCd1−xS nanorods were hydrothermally synthesized by a template reaction of CdS nanorods with ZnCl2·H2O and thiourea at 180 °C. Through changing the molar ratio of Zn to Cd in the reactants, ZnxCd1−xS nanorods (0&lt;x&lt;0.55) were obtained. XRD, ICP-AES, TEM and UV–vis were used to characterize the samples.
Surface Second Order Optical Nonlinearity of Titanium Dioxide Sized in Nanometer Range
Authors: Fu De-gang , Zhang Yu , Wang Xin , Liu Ju-zheng , Lu Zu-hong 
Published: September 2002

Abstract
The nanoparticles of a centrosymmetric material titanium dioxide (TiO2) have been synthesied and characterized by hyper-Rayleigh scattering (HRS) technique. The particles with mean diameter of 10 nm have large first order hyperpolarizability in solution, which arise from the surface layer of the particles.
The Effect of Molecular Structure on Liquid Crystal Properties in Binary Mixtures
Authors: Wu Jianwei , Okamoto Hiroaki , Takenaka Shunsuke 
Published: September 2002

Abstract
The mesomorphic properties of some binary mixtures consisting of 4-alkoxyphenyl 4-(2-R- or 4-R-3-alkoxybenzoyloxy)benzoates (R=H, CH3, Br, or CN) and 4-cyano-4′-octyloxybiphenyl or 4-pentyloxyphenyl 4-[(4-octyloxy)benzoyloxy]benzoate were examined. In the binary phase diagrams an enhanced and/or induced smectic A phases were observed, even if both components have terminal polar group. The mesomorphic properties are discussed in terms of both electrostatic nature of substituents and molecular shapes of both components.
Design and Gas Adsorption Property of a Three-Dimensional Coordination Polymer with a Stable and Highly Porous Framwork
Authors: Seki Kenji , Takamizawa Satoshi , Mori Wasuke 
Published: September 2002

Abstract
A three-dimensional coordination polymer was synthesized from porous copper(II) terephathlate and triethylenediamine (TED) as a pillar ligand, which has a higher porosity and higher capacity for methane adsorption than zeolites and porous coordination polymers reported previously.
Enhanced Photocatalytic Dechlorination of 1,2,3,4-Tetrachlorobenzene Using Nanosized CdS/TiO2 Hybrid Photocatalyst under Visible Light Irradiation
Authors: Yin Hengbo , Wada Yuji , Kitamura Takayuki , Sakata Takao , Mori Hirotaro , Yanagida Shozo 
Published: September 2002

Abstract
The photocatalytic activity of CdS nanocrystallites (n-CdS) supported by TiO2 (P-25) nanocrystallites was higher for reductive dechlorination of 1,2,3,4-tetrachlorobenzene than that of n-CdS alone under visible light irradiation. This synergistic effect of TiO2 could be explained as being due to the adsorptive interaction of triethylamine (TEA) at the CdS/TiO2 interface, which contributed to the effective quenching of the holes formed in n-CdS by TEA.
On the Delicate Influence of a Minute Amount of Water on the Organogel Stability Comprised of a Sugar-Integrated Gelator
Authors: Tamaru Shun-ichi , Luboradzki Roman , Shinkai Seiji 
Published: September 2002

Abstract
It was found that the stability of organogel of methyl-4, 6-O-benzylidene-α-d-glucopyranoside (1) is sensitively affected by a minute amount of concomitant water: the maximum stability is observed at [H2O]/[1] = 1.0. The effect of water molecules on the organogel stability is well understood in relation to its crystal structures. Thus, this paper has provided an important admonition for the stability of hydrogen-bond-dependent organogels.
Synthesis and Structure of Azobenzenes Bearing Silyl, Germyl, and Stannyl Groups at 2-Position
Authors: Kano Naokazu , Komatsu Fuminori , Kawashima Takayuki 
Published: September 2002

Abstract
Azobenzenes, 2-R12R2MC6H4N=NPh (M = Si (1a–c), Ge (7), and Sn (8)), were synthesized by reactions of 2-lithioazobenzene (6) with the corresponding chloro compounds, R12R2MCl, respectively, in good to moderate yields. The crystal structure of 1c was established by the X-ray crystallographic analysis.
Methane-Steam Reforming over Ni/Al2O3 Catalyst Prepared Using W/O Microemulsion
Authors: Hayashi Hiroki , Murata Seiichiro , Tago Teruoki , Kishida Masahiro , Wakabayashi Katsuhiko 
Published: September 2002

Abstract
The catalytic activity and durability of methane-steam reforming under a low H2O/CH4 molar ratio was studied on an Ni/Al2O3 catalyst prepared using water-in-oil (w/o) microemulsion. The initial activity of the prepared Ni/Al2O3 catalyst was higher than that of an impregnated one. The impregnated catalyst deactivated rapidly and lost its activity at a time-on-stream of 15 h due to severe coking (&gt; 30 wt%-carbon after 20 h). In contrast, the catalyst prepared using w/o microemulsion sustained its activity for 40 h, and gave little coke (&lt;0.3 wt%-carbon after 40 h) on the catalyst.
Extended Silapericyclynes
Authors: Unno Masafumi , Negishi Keisuke , Matsumoto Hideyuki 
Published: September 2002

Abstract
The synthesis of medium to large-membered cyclic silicon-butadiyne compounds (‘extended silapericyclynes’) was accomplished by the reaction of dilithiobutadiyne with dichlorodiisopropylsilane. The cyclic tetramer, pentamer, hexamer, and heptamer were obtained in 8%, 5%, 4%, and 2% yields, respectively. The structure of the tetramer was determined, and column-like packing was observed. The UV spectra of all compounds are also shown.
Isolation and Single X-ray Crystal Structure of a Flattened M3L2 Type Metallosupramolecular Cage Obtained by Self-Assembly of Tripodal Ligand with Zinc(II) Chloride
Authors: Sun Wei-Yin , Xie Jin , Yu Kai-Bei 
Published: September 2002

Abstract
A novel cake-like complex, Zn3(tbib)2Cl6·3DMF·2H2O [tbib = 1,3,5-tris(benzimidazol-2-ylmethyl)benzene], was synthesized by self-assembly of tripodal ligand tbib with zinc(II) chloride. The X-ray crystal structural analysis indicates that the framework is a flattened M3L2 type cage-like complex in which the tbib ligand has a cis, trans, trans conformation.
Sonochemical Synthesis and Phase Control of Nanocrystalline CdS
Authors: Wang Guozhong , Li Guanghai , Liang Changhao , Zhang Lide 
Published: September 2002

Abstract
Sonochemical reaction has been successfully used to prepare CdS nanocrystalline with either hexagonal or cubic phase structure at room temperature. It was found that the solvent has a great influence on the phase structure. The product was characterized by X-ray diffraction and transmission electron microscope. The possible mechanisms for the formation of CdS nanocrystalline in different solvents are proposed.
Formation and Cleavage of a Dicobalt Complex Bridged with a Pentamethylene Group
Authors: Shimakoshi Hisashi , Koga Masaomi , Hayashi Takashi , Tachi Yoshimitsu , Naruta Yoshinori , Hisaeda Yoshio 
Published: September 2002

Abstract
A new dicobalt complex bridged with a pentamethylene group was prepared and characterized by electronic and ESI mass spectroscopies. This cobalt complex gives cyclopentane via radical intermediates by anaerobic photolysis.
Synthesis of Self-Complementary Betainic Guanine Model Compounds
Authors: Schmidt Andreas , Kindermann Markus Karl 
Published: September 2002

Abstract
Reaction of 4-(dimethylamino)pyridine and 1-methylimid-azole, respectively, on 2-amino-4-chloro-6-hydroxypyrimidine resulted in the formation of pyrimidine-heteroarenium salts. These could be deprotonated using anion exchange resin to yield pyridinium-pyrimidinolates as model compounds for biologically highly important betainic guanines present in RNA. As proved by ESIMS, these cross-conjugated mesomeric betaines are self-complementary and form homo-intermolecular dimers.
A Novel One-Dimensional Chain Cyano-Bridged Complex [Sm(DMF)4(H2O)2Mn(CN)6·H2O]n: Long-Range Magnetic Ordering, Tc = 18 K and Coercive Force Hc = 600 Oe
Authors: Yan Bing , Chen Zhida , Wang Shixi , Gao Song 
Published: September 2002

Abstract
A novel cyano-bridged heteronuclear complex [Sm(DMF)4(H2O)2Mn(CN)6·H2O]n has been synthesized based on the reaction of K3Mn(CN)6, Sm(NO3)3·6H2O and N,N-dimethylformamide (DMF). The crystal structure shows that title complex is a one-dimensional chain complex with two cis-CN bridging ligands between Sm atom and Mn atom. The measurement of magnetic property evidences an antiferromagnetic interaction between Sm and Mn atom. It is very interesting that title complex exhibits unusual magnetic properties, such as long-range magnetic ordering, critical temperature Tc = 18 K and stronger coercive force Hc = 600 Oe.
Growth of a New Nonlinear Optical Crystal Ba2Be2B2O7 by TSSG Method
Authors: Qi Hua , Chen Chuangtian 
Published: September 2002

Abstract
In this work, a new nonlinear optical Ba2Be2B2O7 crystal was grown by top-seeded solution growth method using BaB2O4–BaCO3–NaF fluxes. The differential thermal analysis curve and a typical angle-tuned curve of Ba2Be2B2O7 crystal were also investigated. The measured ultraviolet absorption edge of the title crystal was found to be about 215 nm.
Drastic Photoluminescence Quenching of Perylene Derivative Membrane with Phthalocyanine Coating
Authors: Nagai Keiji , Fujimoto Yasushi , Shiroishi Hidenobu , Kaneko Masao , Norimatsu Takayoshi , Yamanaka Tatsuhiko 
Published: September 2002

Abstract
The photoluminescent property of a bilayer of phthalocyanine and a perylene derivative, a part of an organic photovoltaic cell, was investigated. The monolayer of the perylene derivative exhibited photoluminescence at 824 nm with lifetimes of 1.6 ns and 0.10 ns. The steady state and time-resolved photoluminescence of the 100-nm perylene derivative layer were efficiently quenched with a 100-nm phthalocyanine coating. The high efficiency of the quenching was explained by the high mobility of the photogenerated carrier in the n-type semiconducting perylene derivative, and agreed with the insensitivity of the photovoltaic property of the bilayer to the thickness.
Formation of Ethylene-Bridged Bimetallic Zirconocene Complexes by Coupling of Cp2ZrEt2 and Cp2ZrX2 (X = Cl or Br)
Authors: Ura Yasuyuki , Jin Masayoshi , Nakajima Kiyohiko , Takahashi Tamotsu 
Published: September 2002

Abstract
Cp2ZrEt2 reacted with one equiv of Cp2ZrX2 (X = Cl or Br) in THF to afford ethylene-bridged bimetallic zirconocene complexes, (Cp2ZrX)2(CH2CH2) (X = Cl (2a), or Br (2b)), in high yields. The structure of 2b was determined by X-ray analysis. Reactions of 2a–b with various anions Y− gave a series of ethylene-bridged bimetallic zirconocene complexes, (Cp2ZrY)2(CH2CH2) (Y = Ph, Me, Bu, CH2SiMe3) in good to high yields.
Stabilized Self-Sustained Sequence Replication against Evolutionary Instability
Authors: Yamamoto Yuji , Komiya Shouichi , Husimi Yuzuru 
Published: September 2002

Abstract
When self-sustained sequence replication, which is an isothermal amplification method of DNA/RNA, was applied to in vitro evolution experiments, it often showed evolutionary instability. A method to prevent this instability was devised using a DNA oligomer of promoter sequence with modified 3'-end.
Ethylene Polymerization and Ring-Opening Metathesis Polymerization of Norbornene Catalyzed by (Arylimido)(aryloxy)vanadium(V) Complexes of the Type, V(Nar)(Oar′)X2 (X = Cl, CH2Ph)
Authors: Nomura Kotohiro , Sagara Asami , Imanishi Yukio 
Published: September 2002

Abstract
VCl2(N-2, 6-Me2C6H3)(O-2, 6-iPr2C6H3) - methylaluminoxane catalyst has exhibited remarkable catalytic activity for ethylene polymerization. High molecular weight ring-opened poly(norbornene) has been prepared in the presence of V(CH2Ph)2(N-2, 6-Me2C6H3)(O-2, 6-iPr2C6H3).
Electrically Induced Creeping and Bending Deformation of Plasticized Poly(vinyl chloride)
Authors: Uddin Md Zulhash , Yamaguchi Masaki , Watanabe Masashi , Shirai Hirofusa , Hirai Toshihiro 
Published: September 2002

Abstract
We have successfully actuated a non-ionic poly(vinyl chloride) (PVC) gel by applying a dc electric field, and found a localized creeping deformation, which induced a novel type large bending of the gel rod just like a joint in a body. The gel was composed of PVC and dioctylphthalate (DOP), and was free of electrolytes. We proposed a tentative mechanism for the reversible and remarkable deformation. It could be an advantage over conventional electroactive gels for durability and performance in practical applications as a new class of soft functional materials.
Synthesis and Structure of an Open-Framework Zinc Phosphate with Two-Dimensional Intersecting Channels
Authors: Zhao Yongnan , Shi Zhan , Chen Xiangming , Mai Zhenhong , Feng Shouhua 
Published: September 2002

Abstract
A three-dimensional zinc phosphate templated by diethylenetriamine is synthesized under hydrothermal conditions; structure refinement shows that it possesses two-dimensional intersecting channels.
Influence of the Process on the Mechanisms and the Performances of the Preferential Crystallization: Example with (±)-5-(4-Bromophenyl)-5-methylhydantoin
Authors: Courvoisier L , Ndzié E , Petit M-N , Hedtmann U , Sprengard U , Coquerel G 
Published: September 2002

Abstract
Resolution of the title compound is carried out at a two liter scale via two different processes of preferential crystallization (PC), the Auto Seeded Programmed Polythermic Preferential Crystallization (AS3PC) process and the classical Seeded Isothermal Preferential Crystallization (SIPC) process. The ratio, crystal growth rate/secondary nucleation rate, is strongly under the influence of the process. Consequently AS3PC process appears more efficient than SIPC process in terms of purity of the crops (optical purity), yield, easiness of scale up and downstream operations such as filterability.
Photochromism of Diarylethenes on Porous Aluminum Oxide: Fatigue Resistance and Redox Potentials of the Photochromes
Authors: Uchida Kingo , Fujita Masayuki , Aoi Yoshifumi , Saito Mitsunori , Irie Masahiro 
Published: September 2002

Abstract
The photochromism of three diarylethene derivatives was examined on porous aluminum oxide. Upon alternate irradiation with UV and visible light, the diarylethenes having thiophene rings decomposed easily, while a derivative having benzothiophene rings underwent a reversible photochromic reaction. The decomposition started from the closed-ring isomers of the dithienylethenes. The decomposition mechanism was discussed based on the oxidation potentials of the compounds.
Rapid and Complete Hydrodechlorination of 2,4-Dichlorophenoxyacetic Acid Catalyzed by Pd/TiO2 with H2 in Deionized Water
Authors: Yamanaka Ichiro , Nishikawa Koji , Otsuka Kiyoshi 
Published: September 2002

Abstract
Pd/TiO2 catalyzes rapid and complete hydrodechlorination of 2,4-dichlorophenoxyacetic acid dissolved in H2O with H2 to phenoxyacetic acid with a high turnover number of Pd at 303 K.
A Cyclic Sugar Unit Interacts More Strongly with DNA Than Do Open-Chain Polyol Counterparts in Sugar-Linked Synthetic DNA Intercalators
Authors: Kumasaki Atsushi , Goto Tomoko , Nakamura Shigeo , Ihara Toshihiro , Takagi Makoto 
Published: September 2002

Abstract
We synthesized new DNA intercalators, polyol- or cyclic sugar-linked anthraquinone derivatives. The binding affinity of these DNA intercalators is suggested to be controlled by the configuration and steric structure of sugar chain with the cyclic sugar chain interacting more strongly than the open-chain polyol unit with double stranded DNA.
Particle Crystals of Surface Modified Gold Nanoparticles Grown from Water
Authors: Kimura Keisaku , Sato Seiichi , Yao Hiroshi 
Published: September 2002

Abstract
Surface modified nanometer-sized gold particles with mercaptosuccinic acid (MSA) are crystallized in the size range of a few micrometer. Two dimensional superlattice was also generated in the same system. The transmission electron microscope images of these superstructures and the reflectance spectrum are reported in comparison with that of bulk sample.