Spectroscopic evidence for argentophilicity in structurally characterized luminescent binuclear silver(I) complexes

被引：346

作者：

Che, CM ^{[1
]}

Tse, MC ^{[1
]}

Chan, MCW ^{[1
]}

Cheung, KK ^{[1
]}

Phillips, DL ^{[1
]}

Leung, KH ^{[1
]}

机构：

[1] Univ Hong Kong, Dept Chem, Hong Kong, Hong Kong, Peoples R China

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2000年 / 122卷 / 11期

关键词：

D O I：

10.1021/ja9904890

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A spectroscopic and structural investigation of binuclear silver(I) complexes supported by aliphatic phosphine ligands, namely [Ag(PCy3)(O2CCF3)](2) (1), [Ag-2(mu-dcpm)(2)]X-2 (X = CF3SO3, 2; PF6, 3; dcpm = bis(dicyclohexylphosphino)methane), and [Ag-2(mu-dcpm)(mu-O2CCF3)(2)] (4), is described. X-ray structural analyses of 1-4 reveal Ag-Ag separations of 3.095(1), 2.918 (av), 2.923 (av), and 2.8897(9) Angstrom, respectively. Due to the optical transparency of the phosphine ligands, the UV-vis absorption band at 261 nm in CH3CN for 2 and 3 is assigned to a 3 delta sigma* -> 5p sigma transition originating from Ag(I)-Ag(I) interactions. The argentophilic nature of this band is verified by the resonance Raman spectrum of 2 with 273.9 nm excitation, where virtually all of the Raman intensity appears in the Ag-Ag stretch fundamental (80 cm(-1)) and overtone bands. Complexes 2 and 3 exhibit photoluminescence in the solid state at room temperature.

引用

页码：2464 / 2468

页数：5

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