Five chiral Cd(II) complexes with dual chiral components have been synthesized by using a series of (1R,2R)–N1,N2-bis(pyridinylmethyl)cyclohexane-1,2-diamine ligands with different N-positions of pyridyl rings and Cd(NO3)2. The circular dichroism (CD) spectra and second-harmonic generation (SHG) efficiency measurements confirmed that they are of structural chirality in the bulk samples. The luminescent
通过使用一系列具有不同N位的(1 R,2 R)– N 1,N 2-双(吡啶基甲基)环己烷-1,2-二胺配体合成了五种具有双手性组分的Cd(II)配合物吡啶环和Cd(NO 3)2的键合。圆二色性(CD)光谱和二次谐波产生(SHG)效率测量结果证实,它们在大体积样品中具有结构手性。发光性质表明它们可能作为光学材料具有潜在的应用。离散的单核和双核复合物以及一维链的形成可能归因于配体的位置异构。
Versatile Supramolecular Copper(II) Complexes for Henry and Aza-Henry Reactions
作者:Guoqi Zhang、Eiji Yashima、Wolf-D. Woggon
DOI:10.1002/adsc.200900069
日期:2009.6
Abstractmagnified imageChiral supramolecular metal‐organic frameworks assembled from copper complexes catalyse Henry and aza‐Henry reactions of aromatic and aliphatic aldehydes and N‐protected aromatic imines in high yield and good to excellent enantioselectivity. Reactions can be performed in the absence of base in ethanol or water.