Mechanistic study on the photochemical "light switch" behavior of [Ru(bpy)2dmdppz]2+

Erin Wachter, Edith C. Glazer

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29 Scopus citations


[Ru(bpy)2dmdppz]2+ (bpy = 2,2'=-bipyridine and dmdppz = 3,6-dimethyl dipyridylphenazine), a strained Ru(II) polypyridyl complex, is a derivative of the wellknown luminescent 'glight switch', [Ru(bpy)2dppz]2+ (dppz = dipyridylphenazine). [Ru(bpy)2dmdppz]2+ is of interest because it acts as a photochemical sensor and metalating agent for DNA. Here we report a detailed study to elucidate the mechanism of ligand substitution by investigating the photochemical reaction in a variety of solvents and by determining the effects of different incoming ligands, the incoming ligand concentration, and the temperature dependence. Results from these studies indicate that the mechanism of substitution is associative or interchange associative, in contrast with the dissociative mechanism of other photolabile Ru(II) polypyridyl complexes.

Original languageEnglish
Pages (from-to)10474-10486
Number of pages13
JournalJournal of Physical Chemistry A
Issue number45
StatePublished - Nov 13 2014

Bibliographical note

Publisher Copyright:
© 2014 American Chemical Society.

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry


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