Laser Chemistry
Volume 19 (1999), Issue 1-4, Pages 279-282
doi:10.1155/1999/43782

Time-Resolved Infrared Spectroscopy of Binuclear Rhenium (I) Polypyridyl Complexes in Solution

L. C. Abbott,1 C. J. Arnold,1 K. C. Gordon,2 R. E. Hester,1 J. N. Moore,1 R. N. Perutz,1 and T.-Q. Ye1

1Chemistry Department, The University of York, Heslington, York YO1 5DD, United Kingdom
2Chemistry Department, University of Otago, P. O. Box 56, Dunedin, New Zealand

Received 30 April 1997

Copyright © 1999 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A series of four binuclear rhenium (I) complexes of the general form [Re(CO)3Cl]2BL, where BL is a polypyridyl bridging ligand, have been studied using ultrafast time-resolved UV/visible (TRVIS) and infrared (TRIR) spectroscopies. Visible excitation produces a metal-to-ligand charge-transfer (MLCT) excited state. Kinetic measurements show that the lifetime of this MLCT state varies between 100 and 1900 ps, depending on the structure of the bridging ligand. TRIR difference spectra show that each complex forms a similar MLCT state which has mixed valence character.