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Issue 7, 2007
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Solvent dependent photophysics of fac-[Re(CO)3(11,12-X2dppz)(py)]+ (X = H, F or Me)

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Abstract

The photophysical properties of [Re(CO)3(dppz)(py)]+ (dppz = dipyrido-[3,2-a:2′,3′-c] phenazine) (1) and its 11,12 substituted derivatives [Re(CO)3(dppzMe2)(py)]+ (2) and [Re(CO)3(dppzF2)(py)]+ (3) have been examined in organic and aqueous environments using phosphorescence and picosecond transient visible and infrared absorption spectroscopic methods. The roles of the intraligand IL(π–π*) and metal-to-ligand charge transfer MLCT(phz) excited states are evaluated and used to explain the major effect of difluoro-substitution, which is particularly remarkable in water, where the excited state of [Re(CO)3(dppzF2)(py)]+ (3) is strongly quenched.

Graphical abstract: Solvent dependent photophysics of fac-[Re(CO)3(11,12-X2dppz)(py)]+ (X = H, F or Me)

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Article information


Submitted
21 Dec 2006
Accepted
02 Apr 2007
First published
08 May 2007

Photochem. Photobiol. Sci., 2007,6, 741-748
Article type
Paper

Solvent dependent photophysics of fac-[Re(CO)3(11,12-X2dppz)(py)]+ (X = H, F or Me)

J. Dyer, C. M. Creely, J. C. Penedo, D. C. Grills, S. Hudson, P. Matousek, A. W. Parker, M. Towrie, J. M. Kelly and M. W. George, Photochem. Photobiol. Sci., 2007, 6, 741
DOI: 10.1039/B618651C

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