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1.
Synthesis and Crystal Structure of Ethyl(2-amino-4-(3-nitrophenyl)-1,4-dihydro-2H-pyrano[3,2-h]quinolin-3-)carboxylate 总被引:1,自引:1,他引:0
1 INTRODUCTION 2-Aminochromene is an important class of com- pounds found as the main compounds of many naturally occurring products employed as cos- metics and pigments[1] and utilized as potential biodegradable agrochemicals[2~4]. The utility of fluoride salts as potential base in variety of syn- thetic reactions has been recognized in recent years[5, 6]. However, low solubility of fluoride salts in ordinary solvents limits their wide applications in organic syntheses. On the other ha… 相似文献
2.
LAI Zhu-Zhia b FU Rui-Biaoa SHENG Tian-Lua LI Ya-Mina HUANG Xi-Hea WU Xin-Taoa② a 《结构化学》2006,25(11):1397-1401
1 INTRODUCTION Many efforts have been devoted to the synthesis of metal organophosphonates during the past three decades because of their rich variety of structural chemistry as well as their practical or potential applications in the areas of adsorption/desorption[1, 2], catalysts[3, 4], meso-/microporous materials[5~7] and intercalation chemistry[8~16]. One encouraging deve- lopment direction is the use of phosphonic acids with bi- and trifunctional groups, such as amino, hydroxyl and… 相似文献
3.
1INTRODUCTION Imidazole(Him)or pyrazole(Hpz)and its deriva-tives in their deprotonated forms have been exten-sively employed in building a large variety of po-lynuclear complexes and polymeric systems[1].A number of metal imidazolates have been studied owing to their fascinating properties and great poten-tial applications,such as high thermal stability[2],magnetic hysteresis[3],luminescence[4]as well as anticorrosive[5]and microbial activities[6].As an im-portant branch,copper imidazolat… 相似文献
4.
1 INTRODUCTION The chemistry of polyoxometalates has been at- tracting much attention due to the richness in their structures, electron and proton storage abilities, ther- mal stability and applications in catalysis, medicine and surface sciences[1~3]. In recent years, the mixed- valence as well as full oxidized vanadium polyoxo- anions have been crystallized with a variety of orga- nic molecules as counteranions[4~8]. However, the guiding principles of the crystal structures of poly- o… 相似文献
5.
Deposition features of Ni on self-assembled microtubule template from biolipid by electroless method 总被引:1,自引:0,他引:1
FU Yubin ZHANG Lide ZHENG Jiyong FU Shangang & ZHU Mingwei . Institute of Solid State Physics Chinese Academy of Sciences Hefei China . Luoyang Ship Material Research Institute Luoyang China . College of Life Science Henan Normal University Xinxiang China 《中国科学B辑(英文版)》2004,47(3):228-234
The self-assembly of lipid molecules is in close relationship with the structure and function of a cell membrane. A cell membrane has a variety of lipid molecules. Lipid molecules have their amphiphile na-tures, and their self-assembly can form a variety of thermodynamically stable microstructures, such as single-bilayer or multi-bilayer spherical and ellipsoidal liposome, microcylindrical and microtubular struc-tures[1]. These microstructures exhibit different bio-logical functions in living … 相似文献
6.
FU Yubin ZHANG Lide & ZHENG Jiyong . Institute of Solid State Physics China Academy of Sciences Hefei China . Luoyang Ship Material Research Institute Luoyang China 《中国科学B辑(英文版)》2006,49(3):238-245
Molecular self-assembly is a powerful approach for preparing new supermolecular architectures such as nanofibers and nanotubes[1]. Lipid molecules, due to their amphiphilic nature, can self-assemble to form a variety of microstructures, such as spherical liposome, tubules and helical ribbons[2]. Many lipid molecules can self-organize into the helical ribbon structures[3,4], for example, helical ribbons were self-assembled in a variety of multicomponent enantiomerically pure sys- tems that cont… 相似文献
7.
1 INTRODUCTION 2-Amino-3H-phenoxazin-3-one (APX) is related to the naturally occurring antineoplastic actinomycin D and has been used as a chemical model of actinomycin D[1]. Usually APX is synthesized from 2-aminophenol with the phenoxazinone synthase in human body[2]. A variety of artificial synthesis methods of APX via the oxidation of 2-aminophenol have also been reported, but each method needs some artificial condition such as chemical catalysis[3~7], natural enzyme[8], UV… 相似文献
8.
1 INTRODUCTION Schiff bases and their metal complexes are useful reagents in organic synthesis[1], and they have exhi- bited some biological activities as anticancer and antitumor drugs[2]. The crystal structures and physi- cal and chemical properties of many Schiff bases and their transition metals complexes have been re- ported[3~5]. Further interest in the coordination che- mistry of nickel(II) arises from the role of these complexes in several catalytic reactions, such as electrocat… 相似文献
9.
GUO Jianguang LI Zhong XI Hongxia XIA Qibin Research Institute of Chemical Engineering South China University of Technology Guangzhou China 《Chinese Journal of Reactive Polymers》2005,(Z1)
1. INTRODUCTION Volatile organic compounds (VOCs), which are emitted from many industrial processes and transportation activities, were considered as an important class of air pollutants, either directly, through their toxic or malodorous nature, or indirectly, as ozone precursors [1,2]. Catalytic combustion is one of the most promising technologies for the destruction of VOCs due to its definitive character and save of energy. In oxidizing a variety of VOCs to CO2 and water vapour, t… 相似文献
10.
《高等学校化学研究》2005,(5)
Open-framework materials are of great interestfrom both the theoretical and practical points of viewdue to their catalytic, absorbent, and ion-exchangeproperties[1]. In the past decade, the study of structur-ally and chemically diverse open framework solids hasbeen flourishing[2—7]. A large variety of silicates[2],phosphates[3]and carboxylates[4]with open-frameworkstructures have been synthesized with organic amines astemplates. Ithas also been demonstrated thatother oxy-salts such as selenat… 相似文献
11.
1 INTRODUCTION The role played by CH…O hydrogen bonds in determining molecular conformation and crystal packing, in molecular recognition processes, in the stabilization of inclusion complexes, and possibly in the activity of biological macromolecules has been well established[1,2]. According to Desirajus structural setting for C-H贩稯 hydrogen bonds, the D (to define the C贩稯 contact distances) values within the range of 3.00~4.00 and the angles of CH…O with 150≤≤180 are stru… 相似文献
12.
Hydrothermal Synthesis and Structure of a New Molybdenum Phosphate: (NH_3CH_2CH_2NH_3)_(2.5)[Mo_5O_(15)(PO_4) (HPO_4)]·7.5H_2O 总被引:2,自引:0,他引:2
1 INTRODUCTION A new class of materials of metal oxide clusters based on anionic molybdenum phosphate frameworks has received much attention as a consequence of their potential applications in catalysis and materials science [1]. As a result, some molybdenum phosphates have been studied [2,3]. Recently we have studied the structure of NaPMO material[4] and the spectrum of multicomponent compound with Keggin struc- ture [5]. Here we report the synthesis and crystal structure of a new… 相似文献
13.
The hydrothermal reaction of Na2MoO4·2H2O, SmCl3 in acidified H2O/CH3CN
solution gives rise to the title compound as colorless needle crystals, which was characterized by
elemental analysis, IR and X-ray single-crystal diffraction techniques. Crystallographic data:
Orthorhombic, Pnma, H3Mo3NaO11, Mr. = 489.83, a = 8.411(2), b = 7.566(2), c = 14.359(3) A,
V= 913.8(3) A3, Z = 4, De = 3.560 g·cm-3,μ = 4.148 mm-1, F(000) = 912, the final R = 0.0649
and wR = 0.1569 for 1885 observed reflections with I ≥ 2σ (I). The title compound consists of
infinite chains built up by distorted {MOO6} octahedra via edge sharing, which are further
connected into a three-dimensional framework by sodium ions and protoned water molecules. 相似文献
14.
在水热的条件下合成了1个标题的Mo-Ni-O异核簇合物,化学式为H34Ni5Mo12O52 (Mr = 2311.10),用单晶X射线衍射方法测定了它的结构,该晶体属四方晶系,I41/amd空间群,晶胞参数为a = 15.319(2),c = 30.645(3) ,V = 7191.2(16) 3,Z = 4,Dc = 2.135 g/cm3,μ= 3.369 mm-1, F(000) = 4376, 1036个可观察衍射点(I > 2s(I)),最终结构偏离因子R = 0.0560,wR = 0.1632,S = 1.002。该化合物簇阴离子笼中心是Ni2+,由12个MoO6八面体和4个NiO6八面体通过共角和共边构成。 相似文献
15.
HUANG Xi-He XIANG Sheng-Chang FU Rui-Biao SHENG Tian-Lu ZHANG Jian-Jun LI Ya-Min WANG Long-Sheng WU Xin-Tao ② 《结构化学》2006,(7)
1 INTRODUCTION Polyoxomolybdates have been of great interest due to their unique structural varieties, associated multitude of properties and applications as catalysis, medicine and material[1, 2]. One of the most impor- tant aspects is the synthesis and investigation of the materials on polyoxomolybdates containing organo- metallic groups[3~5]. Such materials can provide molecular models for heterogeneous catalysis and display cooperative effects or bifunctional catalytic activity[6]. O… 相似文献
16.
A new 1D coordination polymer,{[Mn2(4',4-hbc)4(4',4-Hhbc)2(H2O)]·H2O}n(4',4-Hhbc=4'-hydroxyl-biphenyl-4-carboxylic acid),has been hydrothermally synthesized and struc-turally characterized by elemental analysis,IR spectroscopy and single-crystal X-ray diffraction.The crystal belongs to the monoclinic system,space group C2/c with a=52.421(10),b=7.5388(15),c=16.478(3),β=106.12(3)°,V=6256(2)3,Z=4,C78H62Mn2O21,Mr=1445.16,Dc=1.534g/cm3,μ(MoKα)=0.490mm-1,F(000)=2992,R=0.0764 and wR=0.2006 for 2984 observed reflections with I2σ(I).X-ray diffraction analyses reveal that the title compound is a one-dimensional infinite chain,in which the MnⅡ atom adopts a distorted octahedral geometry coordinated by four 4',4-hbc ligands,one 4',4-Hhbc ligand and one water molecule.Furthermore,the luminescent property of title compound was investigated. 相似文献
17.
1 INTRODUCTIONPyridazinone derivatives represent one of the most active classes of compounds possessing a wide spectra of biological activity. They are widely used in pharmaceuticals and agrochemicals[1,2]. Rohm- Haas Company had reported that N-tert-butyl- dibenzoylhydrazine exhibits excellent insecti- cides[3, 4] and t-butyl plays an important role in the insecticide activity [5]. In the previous paper, we had reported that 1-aryl-1,4-dihydro-3- acylhydrazino- carbonyl-4-one-6-methylpy… 相似文献
18.
CHEN Wu-Hua ZHOU Yun-Long TA Hong-Gui HU Zhi-Biao ZHANG Zhu-Sen QIU Ze-Hai ZHANG Li ZENG Qing-Xin 《结构化学》2009,28(12)
The title compound 1 has been synthesized by the reaction of H_2MoO_4, CdCl_2, H_3PO_4, KF, piperazine hexahydrate and water in aqueous solution under mild hydrothermal conditions. Single-crystal X-ray analysis reveals that the title compound crystallizes in the triclinic system, space group P(-1) with a = 14.049(3), b = 15.972(3), c = 20.043(4) (A), α = 85.82(3), β = 81.28(3),γ = 67.15(3)°, V= 4095.9(14) (A)~3, M_r = 3204.62, Z=2,D_c = 2.598 g/cm~3,μ = 2.360 mm~(-1), F(000) = 3124, the final R = 0.0314, wR = 0.0826 and S = 0.989 for 18592 observed reflections with I > 2σ(I). The crystal packing is stabilized by N-H…O and O-H…O intra- and intermolecular hydrogen bonds to form an infinite 3D network. 相似文献
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20.
1 INTRODUCTION The crystal structures of several tetrahalogeno-mercurates (II) have been reported with a wide va-riety of stereochemical arrangements[1, . These stu- 2]dies have shown that the Hg atom… 相似文献