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1.
1 INTRODUCTION Numerous recent reports have been focused on the construction of supramolecular architectures by using some special tripodal ligands with aromatic ring platforms[1~5]. Mixing this kind of ligands with metal ions in a suitable solution generally yields typical 1D, 2D and 3D coordination polymers or large nanometer-sized cavities supposed to be use- ful for catalysis, molecular selection, ion exchange, specific chemical transformations et al.[6~11]. Now our group is inte… 相似文献
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Shang Ying LIU* Yong Sheng LIU Wen Xing ZHANG Chang Qin MA De Hua JIANG College of Chemistry Chemical Engineering Shandong University Jinan 《中国化学快报》2002,13(6):583-586
Dinuclear complexes have been widely investigated since 1970s when Robson proposed the conception of dinucleating ligand1,2. These compounds attracted much interests because of their applications as metal-enzemy model in bioinorganic chemistry or promising applications as functional materials. Most of these dinuclear complexes contain d transition metals as central ions. Few dinuclear U complexes have been reported. It is known, in most complexes of axial ion, five donors from ligands shou… 相似文献
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A C2-symmetrical aryl diphosphite derived from chiral binaphthol was prepared and its rhodium complex was used as catalysts in the asymmetric hydroformylation of olefins. High catalytic activity and good regioselectivity were observed. Up to 31.2% ee and 38.1% ee were achieved for the hydroformylation of 4-fluoro-styrene and vinyl acetate respectively. The influences of ligand-to-metal ratio, reaction temperature and the pressure of syn-gas on the enantioselectivity and regioselectivity were also studied. 相似文献
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FAN Cheng CHEN Chang-Neng MA Cheng-BingCHEN Feng LIU Qiu-Tian 《结构化学》2002,21(6):643-645
<正>A new kind of Cu (II) complex [Cu(tpmb)2Cl2]·CH3OH·H2O (tpmb = 1,3,5-tri(2-pyrimidinyl)sulfanylmethyl-2,4,6-trimethylbenzene) was synthesized, and its structure has been determined by X-ray single-crystal diffraction. It crystallizes in the triclinic, space group P 1 with a = 8.8397(2), b = 13.327(3), c = 13.926(3) A, α = 63.27(3), β = 86.96(3), r = 80.68(3)°, V = 1445.6(5) A3, C49H51Cl2CuN12O2S6, Mr= 1166.82,Z=1, F(000) = 604, Dc = 1.340 g/cm3, μ = 0.735 mm-1, R = 0.0545 and wR = 0.1575 for 4521 observed reflections (I > 2σ(I)). X-ray analysis reveals that the Cu (II) ion is coordinated by two Cl- anions and two nitrogen atoms from different pyrimidine groups, forming a square structure. 相似文献
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Emerald green crystals of a new mixed-valence oxochloromolybdenum complex,Mo(OH)2(2,2′-bipy)Cl2.[MoO(2,2′-bipy)Cl3]2, were obtained in an attempt to synthesize the Mo-S cluster compounds under solvothermal conditions. The title compound was characterized by EPR and X-ray single-crystal diffraction techniques. Crystallographic data: orthorhombic, space group Fdd2, a = 12.684(1), b = 21.518(2), c = 29.096(3)A, Mr = 1103.97, V= 7941(1)A^3, Z= 8, Dc =1.843 g/cm^3,μ= 1.514 mm^-1, F(000) = 4304, R = 0.0654 and wR = 0.1544 for 1944 observed reflections with 1 ≥/ 2σ(I). The compound consists of two different neutral molecules, Mo^IV-(OH)2(2,2′-bipy)Cl2 and MoVO(2,2′-bipy)Cl3. Both Mo^IV and Mo^V ions are in a distorted octahedral environment. The Mo(1)^IV atom is surrounded by two Cl^- ions and two O atoms from OH^- and two N atoms from a 2,2′-bipy ligand. The Mo(2) atom is surrounded by three Cl^- ions, one O^2- anion and two N atoms from another 2,2“-bipy ligand. The bipyridine occupies two cis-equatorial sites, while the Cl^- ions are located at the axial and equatorial positions. 相似文献
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LiXinZHANG GuiZhiLI ZhiQiangLI 《中国化学快报》2004,15(8):954-956
A novel heterocyclic hexacoordinate organotin(Ⅳ) complex, bis(O-vanillin)-semi ethylenediamino dibenzyltin (VEDBT) was synthesized by the reaction of dibenzyltin dichloride with bis(O-vanillin)-semiethyenediamine, its structure has been characterized by spectral methods.The electrodes using VEDBT as a neutral carrier show high selectivity for salicvlate anions. 相似文献
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Bin DONG Ke Zhi WANG* Lin Pei JIN Li Hua GAO Department of Chemistry Beijing Normal University Beijing College of Chemistry Chemical Engineering Beijing Technology Business University Beijing 《中国化学快报》2003,14(2)
There has been explosive interest in the synthesis and applications of novel Ru(II) polypyridyl complexes with respect to molecular sensors1,2, switches3, and sensitizers of Gr鋞zel solar cells based on nanocrystalline TiO24. Here we report a novel Ru(II) complex, which can serve as pH-induced remarkable off-on-off luminescent switch. Scheme 1 The acid-base equilibria of the complex UV-vis absorption and emission spectroscopic pH titration experiments of the Ru complex wit… 相似文献
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Changsheng Lu Xiaoming Ren Ling Liu Yue Zhang Chuanjiang Hu Huizhen Zhu Qingjin Meng 《Journal of inclusion phenomena and macrocyclic chemistry》2002,43(1-2):19-23
A new cyclodextrin derivative with the anion side-arm, mono[6-deoxy-6-(2-sodium thio-1,2-dicyane ethylenylthio)]-cyclodextrin (6-mnt-CD), and its inclusion complex with ferrocene (6-mnt-CD/Fc), have been prepared and characterized by elemental analysis, IR spectroscopy, UV spectroscopy, mass spectrometry, 13C-NMR spectroscopy, thermogravimetry, and cyclic voltammetry (CV). Thermogravimetry analysis of the compound shows that the thermal stabilities of both the host and the guest in the inclusion complex have been greatly improved due to an additional interaction between the side-arm of the host and the guest. The interplay between the guest and the host with side-arm in the complex resulted in smaller positive potential shifts in CV compared to that in the inclusion complex CD/Fc. 相似文献
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Rui Nian HUA Zhi Hong JIA De Min XIE Chun Shan SHI* Faculty of Chemistry Northeast Normal University Changchun Key Laboratory of Rare Earth Chemistry Physics Changchun Institute of Applied Chemistry Chinese Academy of Sciences Ch 《中国化学快报》2002,13(10)
The complex fluoride LiBaF3 is solvothermally synthesized at 180℃ and characterized by means of X-ray powder diffraction, scanning electron microscopy, thermogravimetric analysis and infrared spectroscopy. In the solvothermal process, the solvents, mole ratios of initial mixtures and reaction temperature play important roles in the growth of the single crystal. 相似文献
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DU Kang-Kai LIU Shi-Xiong 《结构化学》2008,27(1):49-52
The copper complex Cu(C12H9N2O3)2 has been synthesized by the reaction of furaldehyde salicylylhydrazone (Hfs) and copper acetylacetonate and characterized by X-ray crystal diffraction and spectroscopic studies. The crystal crystallizes in space group P211n with a = 5.9765(3), b = 15.7196(9), c = 12.0514(6)A,β= 101.618(3)^o, V = 1109.0(1)A^3, C24H18CuN4O6, Mr = 521.96, Z = 2, Dc = 1.563 g/cm^3, μ = 1.035 mm^-1, F(000) = 534, R = 0.0373 and wR = 0.1058 for 2283 observed reflections (I 〉 2σ(I)). The copper atom has a square-planar CuN2O2 coordination and should be in an octahedral coordination if considering Cu-O (phenol) with distances of 2.796(2)A as weak bonds. The neighboring copper complex molecules are linked together by these weak Cu-O (phenol) bonds, resulting in an extended 1D chain. The title compound exhibits paramagnetic property and fluorescence behavior at room temperature supported by the EPR and fluorescence spectra. 相似文献
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WU Mei-Mei CHEN Zhong-Ning 《结构化学》2004,(10)
1 INTRODUCTION Over the past decades, metal alkynyl complexes have attracted more and more attention due to their potential applications in conducting polymers, lumi- nescent materials and supramolecular chemis- try[1~10]. Compared to the rapid growth o… 相似文献
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Debasish Banerjee Yubiao Liu Jouliana M. El Khoury Peter L. Rinaldi 《Supramolecular chemistry》2013,25(4):335-341
The inclusion complex of a new transition metal ligand, 2,4,9-trithia-tricyclo[3.3.1.13,7]decane-7-carboxylic acid (2,4,9-trithia-adamantane-7-carboxylic acid, TPCOOH) in β-cyclodextrin was studied by 1H NMR, 2D NOESY NMR spectroscopy, host-induced CD spectroscopy, and tandem mass spectrometry. 1H NMR, MS–MS and NOESY data show that the TPCOOH guest forms a 1:1 inclusion complex with the host β-cyclodextrin. The NOESY experiments also show that TPCOOH is oriented in the complex with the thioketal end preferentially located at the larger opening of β-cyclodextrin. The orientation of the guest in the host molecule is also confirmed by the induced CD of the ligand, which shows a positive Cotton effect. An association constant of 660±20?M?1 was determined by 1H NMR titration for the complex at room temperature in D2O. 相似文献
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Themetalmacrocycliccomplexeswiththeirunusualoxidationstateshaveattractedmuchinterest.Silver(Il)andsi1ver(IlI)compoundsareusuallyunstab1eduetotheirstrongoxidation.Butsometetraazamacrocyclicligandscandirectlygivestablecom-plexesofsiIver(Il)throughdisproportionatedreactionofsilver(I).12fIere,wereportthesynthesisandeIectrochemicalbehaviorofanewsilver(Il)com-plexAgL(CIO')2(L=5,7,l2,l4-tetraethyl-5,l2-dimethyl-l,4,8,ll-tetraazacyclotetradec-4,l1-diene).Therelativeinformationaboutothersilver(1I… 相似文献
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1 INTRODUCTION The knowledge of all non-covalent interactions, such as strong and weak hydrogen bonds and p…p interactions, is important to the supramolecular chemistry, biochemistry, crystal engineering and material science[1~7]. Several mononuclear complexes of macrocyclic oxamido Schiff base ligands with phenyls have been used as 揷omplex ligands?to design polynuclear complexes[8~11]. Herein we report the molecular and crystal structures, CH贩稯 hy- drogen bonding and p…p stacki… 相似文献
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The single crystals of the title compound were obtained from a reaction of MnCO3,benzenetetracarboxylic acid (H4BTC)and imidazole in an aqueous solution.The crystal of Mn(II)complex (C28H34Mn2N12O12(4H2O,Mr=912.62) belongs to tricli nic,space group Pī with a=10.036(1),b=10.650(1),c=11.102(1)A,α=114.72(2),β=95.75(1),γ=108.46(2)°,V=984.2(2)A3,Z=1,Dc=1.540 g/cm3,F(000)=472,μ(MoKα)=0.726 mm-1,R=0.0409 and wR=0.1166 for 3909 observed reflections (I>2σ(I)).The crystal consists of the polymeric Mn(II)complex anions and discrete Mn(II) complex cations,both with normal octahedral coordination geometry.Each BTC bridges two Mn(II) atoms to form the anionic polymeric chain,and the cations distribute be-tween the chains and link them through both classic and weak C-H…O H-bonding. 相似文献
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CHEN Jinga GAO Dong-Zhaoa WANG Shu-Pinga JIANG Zong-Huia b LIAO Dai-Zhenga YAN Shi-Pinga a 《结构化学》2005,24(7):793-799
1 INTRODUCTION The study of spin exchange interaction between metal centers through extended bridges is an active subject in the field of coordination chemistry[1~3]. Polynuclear complexes with extended ligand bri- dges are currently of considerable interest[4~6]. One of the best strategies to design and synthesize poly- nuclear species is ‘complex as ligand’ approach[4, 7]. The oxamide group is proved to be an interesting multiatomic bridge, linking metals in polynuclear complexes[8… 相似文献
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The amination of a chiral Ni(II) complex as a model reaction was studied to develop a highly practical, efficient, and stereospecific approach for Ni(II) complex reactions in an aqueous phase. A convenient and clean water‐mediated reaction of the Ni(II) complex has been reached, and a broad spectrum of substrates could participate in the process effectively to produce desired products in good yields and excellent diastereoselectivities. Significantly, it is the first report of chiral gly‐Ni(II) complex reaction in aqueous media. 相似文献
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