Luminescent Tetranuclear Silver(I) Arylacetylide Complexes Bearing Tricyclohexylphosphine Ligands: Synthesis, Molecular Structures, and Spectroscopic Comparison with Gold(I) and Copper(I) Arylacetylides
作者:Yong-Yue Lin、Siu-Wai Lai、Chi-Ming Che、Kung-Kai Cheung、Zhong-Yuan Zhou
DOI:10.1021/om010835y
日期:2002.5.1
similar tetranuclear structures are observed. In contrast, the structure of 4 can be described as two interpenetrating tetrahedra of four silver atoms and four phenylbutadiynyl moieties forming a twisted cubane structure, with each silver atom further coordinated to a PCy3 ligand. The electronic absorption spectra of 1−5 in CH2Cl2 are dominated by strong, vibronically structured absorptions at 250−332
一系列发光的四核芳基乙炔银(Ag 4 μ-(C⋮C)x C 6 H 4 R- p)4 }(PCy 3)y ](x = 1,y = 2,R = H (1),CH 3(2),OCH 3(3),C⋮器CPh(5); X = 2,ÿ = 4,R = H(4))用治疗三环己基膦(PCY合成3)与[银(C⋮C)x C 6H 4 R- p }] ∞在二氯甲烷中,在没有光的情况下,已经研究了它们的光谱和光物理性质。的X射线结构1所呈现的平面平行四边形状的Ag 4芯和由将[Ag(C⋮CPH)2 ]和[Ag(上PCY 3)]与苯基乙炔σ配位的银原子在一个片段μ 2 -键合模式(平均非对称Ag-C(α)距离为2.05和2.33Å)。为2,3,和5,具有不同的第在芳基乙炔单元中的取代基上,观察到相似的四核结构。相反,可将4的结构描述为四个银原子和四个苯基丁二炔基部分的两个互穿四面体,形成扭曲的古巴结构,每个银原子进一步与PCy