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

Erin Wachter; Edith C. Glazer

doi:10.1021/jp504249a

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

Erin Wachter, Edith C. Glazer

Chemistry

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

[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 language	English
Pages (from-to)	10474-10486
Number of pages	13
Journal	Journal of Physical Chemistry A
Volume	118
Issue number	45
DOIs	https://doi.org/10.1021/jp504249a
State	Published - Nov 13 2014

Bibliographical note

Publisher Copyright:
© 2014 American Chemical Society.

ASJC Scopus subject areas

Physical and Theoretical Chemistry

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10.1021/jp504249a

Cite this

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title = "Mechanistic study on the photochemical {"}light switch{"} behavior of [Ru(bpy)2dmdppz]2+",

abstract = "[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.",

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N2 - [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.

AB - [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.

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