金(Ⅰ)膦桥配合物光催化苄氯偶联反应的机理  

MECHANISM OF PHOTOCATALYSED COUPLING REACTION FROM BENZYL CHLORIDE BY Au(Ⅰ) PHOSPHINE BRIDGE COMPLEX

作　　者：李丹[1] 支志明[2] 

机构地区：[1]汕头大学化学系,汕头515063 [2]香港大学化学系

出　　处：《催化学报》1999年第2期188-190,共3页

基　　金：广东省博士启动基金!资助项目; 批准号974008

摘　　要：With laser flash photolysis, UV visible absorption spectroscopy and transient absorption spectroscopy techniques, the quenching rates of excited state of [Au 2 ( μ dmpm) 3](ClO 4) 2 by alkyl halides were measured, the steady state photoreaction of [Au 2( μ dmpm) 3](ClO 4) 2 and CHCl 3 was investigated, respectively. The mechanism of C C coupling reaction from benzyl chloride with Au(Ⅰ) phosphine bridge complex as photocatalyst was explored. It was found that [Au 2( μ dmpm) 3](ClO 4) 2 lost a dmpm ligand easily to give [Au 2( μ dmpm) 2](ClO 4) 2, the latter played the key role in the photocatalytic reaction. Bibenzyl was produced by the combination of two benzyl radicals or by the nucleophilic reaction of benzyl anion and benzyl chloride.With laser flash photolysis, UV visible absorption spectroscopy and transient absorption spectroscopy techniques, the quenching rates of excited state of [Au 2 ( μ dmpm) 3](ClO 4) 2 by alkyl halides were measured, the steady state photoreaction of [Au 2( μ dmpm) 3](ClO 4) 2 and CHCl 3 was investigated, respectively. The mechanism of C C coupling reaction from benzyl chloride with Au(Ⅰ) phosphine bridge complex as photocatalyst was explored. It was found that [Au 2( μ dmpm) 3](ClO 4) 2 lost a dmpm ligand easily to give [Au 2( μ dmpm) 2](ClO 4) 2, the latter played the key role in the photocatalytic reaction. Bibenzyl was produced by the combination of two benzyl radicals or by the nucleophilic reaction of benzyl anion and benzyl chloride.

关 键 词：金 配合物 苄氯 偶联反应 光催化剂 联二甲苯 

分 类 号：O625.13[理学—有机化学] O643.36[理学—化学]