A family of dinuclear neutral thiolate gold complexes of the type RPh2PAuS(C6H4)nSAuPPh2R (n = 2, 3), RPh2PAuS(C6H4)S(C6H4)SAuPPh2R, RPh2PAuSCH2(C6H4)2CH2SAuPPh2R where R represents a pyridine or a phenylene ring, has been prepared and fully characterized. X-ray crystallographic studies showed the presence of aurophilic interactions for those species bearing two phenylene spacers between the gold metal centers, leading to infinite chains. The complexes are emissive in the solid state. Theoretical calculations together with the photophysical analysis seem to indicate that the main excitations involved in the emissive processes are due to a mixture of ILCT transition involving the thiolate and the conjugated phenylene rings, and LL′CT transitions comprising the thiolate and the pyridine or phenyl from the phosphine fragment which contrast with the typical gold thiolate emission, LMCT from the thiolate fragment to the metal center.
我们制备并完全表征了 RPh2PAuS(
C6H4)n
SAuPPh2R (n = 2, 3)、RPh2PAuS( )S( )
SAuPPh2R、RPh2PAuSCH2( )2CH2
SAuPPh2R(其中 R 代表
吡啶或亚苯基环)类型的双核中性
硫代酸
金配合物家族。X 射线晶体学研究表明,在
金金属中心之间带有两个亚苯基间隔的复合物存在亲欧相互作用,从而形成无限链。这些配合物在固态下具有发射性。理论计算和光物理分析似乎表明,发射过程中涉及的主要激发是由
硫代
硫酸盐和共轭亚苯基环的 ILCT 转变以及
硫代
硫酸盐和来自膦片段的
吡啶或苯基的 LL′CT 转变组成的混合物引起的,这与典型的
硫代
硫酸盐
金发射(从
硫代
硫酸盐片段到
金属中心的 L
MCT)形成鲜明对比。