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的反应产生具有臂开口构型的复合物2。该复合物随后经AgClO4处理生成复合物4，并分别与乙腈、吡啶和三苯基磷硫化物反应，得到具有臂封闭构型和微弱或弱荧光发射的新型金(I)η2-芳烃复合物3a−c。这一观察结果可归因于蒽单元向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，形成了具有臂开口构型的复合物5，并恢复了强烈的发射。