Synthesis and structural characterization of heteroleptic Cu(I) perchlorate complexes with diimines derived from pyridinyliminobenzoic acids
作者:S. Shakhatreh、J. Mohanraj、A. Czapik、D. Tzimopoulos、S. Kotoulas、M. Gdaniec、P.D. Akrivos
DOI:10.1016/j.molstruc.2011.06.044
日期:2011.9
tetrahedral environment of the metal is completed by the coordination of two triphenylphosphane molecules. The compounds with the mono-substituted ligands crystallize as dimers via hydrogen bonds between the carboxylic groups. The electronic absorption spectra are dominated by the intraligand bands while characteristic charge transfer transitions are observed in the region 360–500 nm. The complexes proved
摘要 三种通式为[Cu(L)(PPh3)2][ClO4]的杂配单价铜配合物的合成及分子电子结构研究,其中L分别为3-,4-吡啶基亚氨基和3,5-二吡啶基亚氨基分别报道了取代的苯甲酸。配合物的晶体结构揭示了金属与配体的二亚胺位点的配位。金属的四面体环境由两个三苯基膦分子的配位完成。具有单取代配体的化合物通过羧基之间的氢键结晶为二聚体。电子吸收光谱由内配体带支配,而在 360-500 nm 区域观察到特征电荷转移跃迁。证明复合物在室温和低温(77 K 刚性基质)下都是弱发射体。这种光致发光的缺乏不能归因于 Cu(I) 金属核的容易氧化,因为它们的循环伏安法研究显示 E1/2 值高于 1.0 V,而是由于配位环境的灵活性,在氧化时会发生重组。