Syntheses, crystal structures, and characterization of four homochiral coordination polymers based on two chiral reduced Schiff base ligands
作者:Shao-Ming Ying、Xiao-Hui Huang
DOI:10.1007/s11243-013-9706-8
日期:2013.5
Four homochiral coordinationpolymers incorporating two chiral reduced Schiff baseligands, namely, [Cu(L1)(H2O)]·H2O (1), [Zn2(L2)2] (2), [Co(L2)(H2O)] (3), and [Ni(L2)(H2O)] (4) (H2L1 = N-(4-carboxyl)benzyl-l-alanine, H2L2 = N-(4-carboxyl)benzyl-l-leucine) have been obtained by hydrothermal methods and characterized by physico-chemical and spectroscopic methods. X-ray crystallographic analysis reveals
Synthesis, crystal structure and nonlinear optical property of a Zinc(II) complex base on the reduced Schiff-base ligand
作者:Shao-Ming Ying
DOI:10.1016/j.inoche.2012.05.026
日期:2012.8
Abstract By hydrothermal reactions of Zn(II) nitrate with N-(4-carboxyl)benzyl- l -alanine acid (H2L), a novel Zn(II) complex, namely, [Zn(HL)2(H2O)2] (1), have been obtained. Single crystal X-ray diffraction analysis reveals that complex 1 crystallizes in the C2 space group and displays a 0D dimensional structure. The Zn(II) ions are four-coordinated and each Zn(II) ion coordinated with two HL anions forming
Chirality and absolute helicity in a pair of enantiomeric amino acid derivatives and their complexes: structures, chiroptical, and photoluminescent properties
作者:Xinfa Li、Huajun Zhao、Qihua Zeng
DOI:10.1039/c3ce27028a
日期:——
coordination helices are further tied up by hydrogen bonds, forming 1D triple-stranded supramolecular helices extending along the same direction. Interestingly, 3L and 3D also showsupramolecular helicities on the directions of b- and c-axes. The chiralities and absolute helicities of these complexes are controlled by the chiralities of ligands. In addition, the solid-state circular dichroism (CD) and photoluminescent
通过对映纯的一步取代反应,合成了一对对映体氨基酸衍生物[ L -H 2 cala(1L)和D -H 2 cala(1D),H 2 cal = N-(4-羧基苄基)-丙氨酸]。L-(或D-)丙氨酸4-(溴甲基)苯甲酸。1L和1D与二价Cu 2+和Cd 2+离子的自组装水制备了两对对映体,分别配制为[Cu(L -cala)(H 2 O)] n · n(H 2 O)(2L),[Cu(D -cala)(H 2 O)] n · n(H 2 O)(2D),[Cd(L -Hcala)2(H 2 O)2 ] n · n(H 2 O)(3L)和[Cd(D -Hcala)2(H 2 O)2 ] n · n(H 2 O)(3D)。X射线衍射分析显示1L和1D是氢键键合的二维(2D)超分子,其中包含与晶体学b轴平行的一维(1D)单链超分子螺旋。2L和2D是沿c轴方向排列的一维单链配位螺旋。它们通过螺旋间氢键进一步