Ground and excited state structural isomers in trans-[Ru(bpy) 2(L) 2](PF 6) 2

Spectroscopic evidence is presented for different structural isomers of trans-[Ru(bpy) 2(L 1)(L 1)] 2+ (L 1 or L 2=4-Etpy ( 1), py-PTZ) in which bpy is planar or nonplanar compared to cis-[Ru(bpy) 2(py) 2] 2+ or [Ru(bpy) 3] 2+ in which bpy is planar. The nonplanar form is dominant in the ground stat...

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Bibliographic Details
Published in:Journal of photochemistry and photobiology. A, Chemistry. Chemistry., 2000-12, Vol.137 (2), p.131-134
Main Authors: Thompson, David W, Schoonover, Jon R, Graff, Darla K, Fleming, Cavan N, Meyer, Thomas J
Format: Article
Language:English
Subjects:
Atomic and molecular physics
Exact sciences and technology
Fluorescence and phosphorescence spectra
Fluorescence and phosphorescence
radiationless transitions, quenching (intersystem crossing, internal conversion)
MLCT excited states
Molecular properties and interactions with photons
Physics
Structural isomers
Temperature dependence
Trans-Ruthenium polypyridyl complexes
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Summary:Spectroscopic evidence is presented for different structural isomers of trans-[Ru(bpy) 2(L 1)(L 1)] 2+ (L 1 or L 2=4-Etpy ( 1), py-PTZ) in which bpy is planar or nonplanar compared to cis-[Ru(bpy) 2(py) 2] 2+ or [Ru(bpy) 3] 2+ in which bpy is planar. The nonplanar form is dominant in the ground states in low temperature glasses. The two forms appear to be in a temperature dependent equilibrium in 4:1 (v/v) ethanol/methanol at higher temperatures. The nonplanar form is converted into the planar form in the MLCT excited state(s) of 1.
ISSN:1010-6030
1873-2666
DOI:10.1016/S1010-6030(00)00347-6