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物2。该复杂物经AgClO4处理形成复杂物4，随后分别与乙腈、吡啶和三苯基硫化磷反应，得到新型金(I)η2-芳烃配合物3a−c，这些配合物具有臂闭合构型，并呈现出微弱或弱的荧光发射。此现象可归因于蒽单元向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，形成臂展开构型的复杂物5，并恢复了强烈的发射。