A Negative Activation Energy for Luminescence Decay: Specific Solvation Effects on the Emission Properties of Bis (2, 2'-bipyridine)(3, 5-dicarboxy-2, 2'-bipyridine) …

…, USM Maharoof, KD Deshayes, TH Kinstle…

Index: Fernando; Maharoof; Deshayes, Kurt D.; Kinstle, Thomas H.; Ogawa, Michael Y. Journal of the American Chemical Society, 1996 , vol. 118, # 24 p. 5783 - 5790

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Citation Number: 58

Abstract

A new mixed-ligand polypyridylruthenium (II) complex,[Ru (bpy) 2L] Cl2, has been prepared where bpy= 2, 2'-bipyridine and L= 3, 5-dicarboxy-2, 2'-bipyridine. The ligand L is a non- symmetrically-substituted 2, 2'-bipyridine having two hydrophilic carboxylate groups located at the 3-and 5-positions of only one of its two pyridyl rings. In acetonitrile, the photophysical properties of the metal complex include a long-lived excited state (λem= 637 nm, τ= 846± ...