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, th...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.展开更多
The catalystic recycle of carbonylation of benzyl chloride catalyzed by Pa TPPTS is more and more important for industry application.The effect of acidity has been studied in this paper.
基金Projects(2127106951238002+3 种基金J1210040J1103312)supported by the National Natural Science Foundation of ChinaProject(2013GK3015)supported by the Science and Technology Project of Hunan ProvinceChina
文摘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.
文摘The catalystic recycle of carbonylation of benzyl chloride catalyzed by Pa TPPTS is more and more important for industry application.The effect of acidity has been studied in this paper.
