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Two 3-D Neutral Zn(Ⅱ)-MOFs Generated from the Asymmetric Schiff-base Ligand 被引量:2
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作者 吴祥雯 张东 +1 位作者 吴振华 马建平 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2014年第9期1326-1332,共7页
Two new Zn(Ⅱ)-MOFs were synthesized based on an asymmetric Schiff-base ligand LH, which is obtained by the condensation of 5-formyl-8-hydroxyquinoline and 3-pyridinecar- boxylic acid hydrazide. In different mixed s... Two new Zn(Ⅱ)-MOFs were synthesized based on an asymmetric Schiff-base ligand LH, which is obtained by the condensation of 5-formyl-8-hydroxyquinoline and 3-pyridinecar- boxylic acid hydrazide. In different mixed solvents, we get two new isomorphism compounds, [Zn(L)2]'CaHsO2-2MeOH (1) and [Zn(L)2]'CH2CIz'2MeOH (2). Compounds 1 and 2 have been characterized by single-crystal X-ray diffraction, elemental analysis and IR. Compound 1 crystallizes in monoclinic, space group P2/c, with a - 13.856(4), b = 14.156(4), c = 9.620(3)А, β = 110.167(5)°, V = 1771.3(9) /k3, Dc = 1.500 g/cm3, C3sH3sNsOsZn, Mr = 800.13, F(000) = 832, p(MoKa) = 0.761 mm-1, Z = 2, the final R = 0.0596 and wR = 0.1221 for 2112 observed reflections (I 〉 2σ(0). Compound 2 belongs to monoclinic, space group P21/c, with a = 13.575(3), b = 14.130(3), c = 9.485(2) A, β = 107.908(3)°, V= 1731.2(6) A3, Dc = 1.529 g/cm3, CasH32C12NsO6Zn, Mr = 796.96, F(000) = 820, g(MoKa) = 0.926 mm-1, Z = 2, the final R -- 0.0527 and wR = 0.1395 for 2501 observed reflections (I 〉 2σ-(/)). The Zn(II) centers in both 1 and 2 display a distorted octahedral coordination geometry. The octahedral Zn(lI) nodes and L linkages build up 2-D nets consisting of parallelogram-like grids in the ab plane. The neighboring nets stack through hydrogen bonds to generate 3-D rhombic channels. In 1, the 1,4-dioxane and MeOH guests alternatively arrange in the channels and effectively take up the free space; while in 2, the CH2CI/guests are arranged in the channels. In addition, the encapsulated MeOH molecules are bonded to the framework by hydrogen bonds. 展开更多
关键词 Zn(Ⅱ) ISOMORPHISM asymmetric schiff-base ligand channels GUESTS
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SVNTHESES AND CHARACTERIZATION OF TWO HIGH VALENCE VANADIUM COMPLEXES (?) SCHIFF-BASE LIGAND WITH RICH PHENOLATE OXVGEN AND THEIR CONVERSION
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作者 Jie DAI Department of Chemistry,Suzhou University,Suzhou 215006Masahiro MIKURIYA Department of Chemistry.Kuansei Gakuin University,Nishinomiya Japan 662 《Chinese Chemical Letters》 SCIE CAS CSCD 1993年第10期929-930,共2页
Two vanadium complexes of schiff base vith rich phenolate oxygen,o-(?)-salicylideneamino- methylphenol,had been synthesized and characterized.One is a V(Ⅳ)complex with an interaction via vanadyl oxygen and the other ... Two vanadium complexes of schiff base vith rich phenolate oxygen,o-(?)-salicylideneamino- methylphenol,had been synthesized and characterized.One is a V(Ⅳ)complex with an interaction via vanadyl oxygen and the other is a novel dinuclear V(V,V)complex with an oxo bridge.The conversion between the two complexes had been discussed. 展开更多
关键词 RICH IR schiff-base ligand WITH RICH PHENOLATE OXVGEN AND THEIR CONVERSION SVNTHESES AND CHARACTERIZATION OF TWO HIGH VALENCE VANADIUM COMPLEXES
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A Novel Copper(Ⅱ)Complex Based on 4-Amino-1,2,4-triazole Schiff-base:Synthesis,Crystal Structure,Spectral Characterization,and Hirshfeld Surface Analysis 被引量:1
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作者 张海洋 肖瑜 朱芸 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2017年第5期848-855,共8页
A novel copper complex Cu2(L)4(1, HL = 2-ethoxy-6-([1,2,4]triazol-4-yliminomethyl)-phenol) has been synthesized and characterized by IR, single-crystal X-ray diffraction, and elemental analysis(CHN). The singl... A novel copper complex Cu2(L)4(1, HL = 2-ethoxy-6-([1,2,4]triazol-4-yliminomethyl)-phenol) has been synthesized and characterized by IR, single-crystal X-ray diffraction, and elemental analysis(CHN). The single crystal belongs to the triclinic system, space group P1 with a = 10.0991(10), b = 10.5280(12), c = 10.5777(11) A, α = 97.230(9), β = 90.640(8), γ = 92.412(9)°, Mr = 1052.05, V = 1114.6(2) A3, Z = 1, Dc = 1.567 g/cm3, F(000) = 542, μ = 1.029 mm–1, R = 0.0562 and w R = 0.1562. The fluorescence and electrochemiluminescence(ECL) of 1and HL ligand were studied. The luminescence properties of 1 can be attributed to the ligand-metal charge transfer. 展开更多
关键词 schiff-base ligand crystal structure FLUORESCENCE electrochemiluminescence Hirshfeid surfaces analysis
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Schiff-base Amino Alcohol-zinc Complex for Enantioselective Addition of Phenylacetylene to Aromatic Ketones
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作者 CHEN Chao HONG Liang +2 位作者 WANG Quan ZHANG Bang-zhi WANG Rui 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2008年第3期306-311,共6页
A complete study of the asymmetric addition of phenylacetylene to ketones catalyzed by Schiff-base amino alcohol-Zn complex is reported in this article. The Schiff-base amino alcohols were easily prepared from amino a... A complete study of the asymmetric addition of phenylacetylene to ketones catalyzed by Schiff-base amino alcohol-Zn complex is reported in this article. The Schiff-base amino alcohols were easily prepared from amino acids in three steps. When the amount of ligand was 1%(molar fraction), an e.e. value up to 94% was obtained. A series of practical chiral ligands were applied in the enantioselective addition of phenylacetylene to ketones without adding another stronger Lewis acid except zinc. 展开更多
关键词 Chiral tertiary alcohol Lewis acid KETONE schiff-base amino alcohol Sulfonamide alcohol Diol ligand
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Structure of Complex [Ni_2L_2](py)_2(H_2O)_2(L=1,3-Di[o-(o-vanillideneimino) phenoxo]-2-propanol Dianion) with New Nucleating Ligand
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作者 Wen Xing ZHANG Shang Ying LIU +1 位作者 Chang Qin MA De Hua JLANG(School of Chemistry, Shandong University, Jinan 250100) 《Chinese Chemical Letters》 SCIE CAS CSCD 1998年第5期483-485,共3页
The title dinuclear complex structUre was determined by X-ray diffraction.
关键词 dinuclear Ni (Ⅱ) complex dinucleating schiff-base ligand STRUCTURE
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One Novel Ag(Ⅰ) Compound Generated from Double Schiff-base Ligand with Quinoxaline-N-oxide as Terminal Binding Sites
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作者 WANG Dong-Xiao WANG Peng CHENG Jun-Yan 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2021年第3期301-305,271,共6页
One novel discrete coordination molecule with Ag^(I) centers,namely[Ag_(3)(L)_(3)(ClO_(4))_(3)]·3CH_(2)Cl_(2)·6CH_(3)OH·1.5H_(2)O (1),has been synthesized based on the double Schiff-base ligand,3,6-bis[... One novel discrete coordination molecule with Ag^(I) centers,namely[Ag_(3)(L)_(3)(ClO_(4))_(3)]·3CH_(2)Cl_(2)·6CH_(3)OH·1.5H_(2)O (1),has been synthesized based on the double Schiff-base ligand,3,6-bis[2-(4-oxidequinoxaline)-yl]-4,5-diaza-3,5-octadiene (L) and AgClO_4.The obtained Ag(I) compound was fully characterized by infrared spectroscopy,elemental analysis,and single-crystal X-ray diffraction.1 is of trigonal system space group P-31c with a=16.320(2),b=16.320(2),c=20.108(6)?,T=173(2) K,V=4638.2(16) A^(3),D_(c)=1.645 g/cm^(3),M_(r)=2297.33,Z=2,F(000)=2334,μ=0.970 mm~(–1),Goodness-of-fit=1.109,the final R=0.0776,wR=0.1813,Rindices (all data)=0.1196,wR=0.2011.The compound exhibits a triple-helical[Ag_(3)L_(3)]^(3+)crown-like trimer,in which three Ag(I) atoms form an equilateral triangle with the Ag···Ag distance of 4.7 A.Uncoordinated counterions ClO_(4)^(–) and solvent molecules methanol generate the hydrogen-bonded frameworks based on discrete molecular complex building blocks. 展开更多
关键词 crystal structure double schiff-base ligand discrete coordination compound hydrogen bond
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过渡-稀土单分子磁体合成方法综述 被引量:4
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作者 向华 黎彧 《精细石油化工》 CAS CSCD 北大核心 2011年第6期74-77,共4页
综述了设计合成3d-4f单分子磁体常见的几种方法:分隔配体法、辅助自组装法和目标位置法,评价了几种方法的优缺点,并对前景做了展望。
关键词 单分子磁体 镧系金属(4f) 分隔配体法 辅助自组装法 目标位置法
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基于席夫碱分隔配体的Cu⁃Tb单分子磁体的阴离子调控 被引量:3
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作者 嵇文杰 夏成才 +1 位作者 张新宇 王新益 《无机化学学报》 SCIE CAS CSCD 北大核心 2022年第6期1199-1208,共10页
基于席夫碱分隔配体H_(2)vanophen(1,2-苯二胺缩邻香草醛),通过引入不同的阴离子,构筑了3个Cu-Tb基金属配合物[Cu_(2)(vanophen)_(2)TbCl_(2)(MeOH)_(2)]Cl·3MeOH(1)、[Cu_(2)(vanophen)_(2)TbCl_(2)(MeOH)_(2)](TCNQ)1.5·2Me... 基于席夫碱分隔配体H_(2)vanophen(1,2-苯二胺缩邻香草醛),通过引入不同的阴离子,构筑了3个Cu-Tb基金属配合物[Cu_(2)(vanophen)_(2)TbCl_(2)(MeOH)_(2)]Cl·3MeOH(1)、[Cu_(2)(vanophen)_(2)TbCl_(2)(MeOH)_(2)](TCNQ)1.5·2MeOH(2)和[Cu_(2)(vanophen)_(2)Tb_(2)(N3)_(6)]·2MeOH(3)(TCNQ=7,7,8,8-四氰基对苯二醌二甲烷),并详细研究了它们的结构和磁性。除了抗衡阴离子外,配合物1和2具有非常相似的[CuTbCu]三核结构;其中Cu(Ⅱ)离子处于席夫碱配体中的[N_(2)O_(2)]配位口袋中,而Tb(Ⅲ)离子则和配体中的[O_(4)]配位口袋中的全部或部分O原子配位。对应于一个三核基元,配合物1中的抗衡阴离子为一个Cl^(-)离子,而配合物2中的抗衡阴离子是一个TCNQ^(-0.5)阴离子及半个TCNQ-阴离子。配合物3是由end-end及end-on叠氮桥联2个[CuTb]单元形成的四核[CuTb]_(2)配合物。磁性研究表明,三核配合物1和2均为场致的单分子磁体而配合物3为零场单分子磁体,其中配合物1和3的能垒分别为(11.1±0.3)cm^(-1)和(20.2±0.3)cm^(-1)。相比于配合物1,配合物2具有更低的能垒,这可能源于其中的阴离子自由基和三核[CuTbCu]基元之间的弱的磁相互作用。 展开更多
关键词 单分子磁体 席夫碱分隔配体 阴离子调控 3d-4f配合物
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Synthesis and Crystal Structure of the Copper(II)Complex with N,N'-Cyclohexanebis(3- formyl- 5-tert-butyl-salicylaldimine)
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作者 刘涛 阮文娟 +3 位作者 张玉玲 朱志昂 陈荣悌 杨志雄 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2001年第3期199-202,共4页
A mononuclear copper(II) complex CuL with a Schiff-base L (H2L = N,N(- cyclohexanebis(3-formyl-5-tert-butyl-salicylaldimine)) has been synthesized and characterized. X-ray diffraction analysis at room temperature indi... A mononuclear copper(II) complex CuL with a Schiff-base L (H2L = N,N(- cyclohexanebis(3-formyl-5-tert-butyl-salicylaldimine)) has been synthesized and characterized. X-ray diffraction analysis at room temperature indicates that the complex (Cu C30H36N2O4, Mr = 552.15) crystallizes in tetrahedral system, space group P41 with a = 13.4685(6), c = 31.326(2) ?, V = 5682.5(5) ?3, Z = 8, Dc = 1.291 g/cm3, F(000) = 4656, μ(MoK() = 0.805 mm-1. The final R and Rw factors are 0.0421 and 0.0815, respectively with 4435 observed reflections. The title complex is a neutral molecule in which the ligand is doubly deprotonated, forming a four-coordinated Cu(II) complex by nitrogen and oxygen donors of the ligand and the coordination geometry of Cu(II) could be considered as an approximately planar configuration. There are two independent molecules, having a transoid arrangement in this structure. 展开更多
关键词 crystal structure copper(II) complex schiff-base ligand
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