Gold(I) η2-Arene Complexes

The reaction of 9-{[N-n-propyl-N-(diphenylphosphino)amino]methyl}anthracene (1) with Au(SMe2)Cl yields complex 2 with an arm-opening configuration. The latter is treated with AgClO4 to form complex 4 and then respectively reacted with acetonitrile, pyridine, and triphenylphosphine sulfide to afford novel gold(I) η2-arene complexes 3a−c, which have arm-closing configurations and feeble or weak fluorescence emissions. The observation can be attributed to charge transfer from the anthracene unit to the Au+ ion. When the solution of 3a or 4 in CH2Cl2 was added with 1 equiv of Ph3P, complex 5 with the arm-opening configuration was formed and strong emission was restored.9-{[N-正丙基-N-(二苯基膦基)氨基]甲基}蒽（1）与Au(SMe2)Cl反应生成臂展开构型的复杂体2。该复杂体经AgClO4处理形成复杂体4，随后分别与乙腈、吡啶和三苯基硫化磷反应，得到新颖的η2-芳基金(I)复杂体3a-c，它们具有臂闭合构型和微弱或弱的荧光发射。这一现象可归因于蒽单元至Au+离子的电荷转移。当3a或4的CH2Cl2溶液中加入1当量的Ph3P时，形成了臂展开构型的复杂体5，并恢复了强烈的发射。