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Direct observation of the fourth MLCT triplet state in ruthenium(II) tris(2,2′-bipyridine)

Lookup NU author(s): Emeritus Professor Anthony Harriman, Dr Guillaume Izzet


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The luminescence properties of ruthenium(II) tris(2,2′-bipyridine) have been recorded in butyronitrile solution and in a transparent KBr disk over a reasonable temperature range. In solution, spectral curve fitting routines indicate that emission arises solely from an ensemble of triplet states, each of which is of Metal-to-Ligand, Charge-Transfer (MLCT) character and of closely comparable energy. At ambient temperature, dual emission is observed for the KBr disk and interpreted in terms of luminescence from both the ensemble and the fourth MLCT triplet state that lies at slightly higher energy. Relative reorganisation energies, energies, Huang-Rhys factors and radiative rate constants have been calculated for the two emissive states. It is confirmed that the fourth MLCT triplet state possesses more singlet character than the ensemble. This journal is © the Owner Societies 2007.

Publication metadata

Author(s): Harriman A, Izzet G

Publication type: Article

Publication status: Published

Journal: Physical Chemistry Chemical Physics

Year: 2007

Volume: 9

Issue: 8

Pages: 944-948

Print publication date: 01/01/2007

ISSN (print): 1463-9076

ISSN (electronic): 1463-9084

Publisher: Royal Society of Chemistry


DOI: 10.1039/b613854n

PubMed id: 17301884


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