Title

The Photophysical Behavior of d(6) Complexes Having Nearly Isoenergetic MLCT and Ligand Localized Excited States

Document Type

Article

Publication Title

Coordination Chemistry Reviews

ISSN

0010-8545

Volume

171

First Page

43

59

Publication Date

1998

Abstract

A large number of second- and third-row d(6) transition metal complexeswith N-heterocyclic ligands have been prepared in which the lowest energy excited state is a metal-to-ligand charge transfer (MLCT) state. In some ofthese complexes ligand localized (IL) excited states exist which are of thesame spin multiplicity as the MLCT state and are energetically accessible from the (MLCT)-M-1 state. Several complexes have been examined which exhibit luminescence from two states in frozen matrices. In fluid solutions, however, only a few examples exist of complexes having two non-equilibrated triplet excited states. This article provides a brief overview of theexperimental methods commonly used in the analysis of triplet excited state formation and relaxation in transition metal complexes having coexisting triplet excited states. In addition, descriptive examples are given ofcomplexes for which both (IL)-I-3 and (MLCT)-M-3 states can be populated following excitation into the 1MLCT state. (C) 1998 Elsevier Science S.A.

Publication Information

Baba, A., Shaw, J., Simon, J., Thummel, R., & Schmehl, R. (n.d). The photophysical behavior of d(6) complexes having nearly isoenergetic MLCT and ligand localized excited states. Coordination Chemistry Reviews, 17143-59.

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