Luminescence of the oxonium ions O(ML)3+ with ML = AuIPPh3 and HgIICl

Zusammenfassung

The oxonium ions O((AuPPh3)-P-1)(3)(+) and O((HgCl)-Cl-II)(3)(+) are phosphorescent at r.t. and 77 K, respectively. It is suggested that these ions which are characterized by a rather flat trigonal pyramid in the ground state undergo a distortion to a steeper pyramid in their phosphorescent states. This structural change is caused by metal-metal bonding in the excited state. (c) 2006 Elsevier B.V. All rights reserved.