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The photophysical properties of short, linear arrays of ruthenium(II) tris(2,2′-bipyridine) complexes

Lookup NU author(s): Emeritus Professor Anthony Harriman


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A series of linear polynuclear ruthenium(II) tris(2,2′-bipyridine) complexes has been synthesized whereby individual chromophores are separated by 1,4-diethynylenebenzene subunits bearing alkoxy groups for improved solubility. These arrays contain two, three, four or five metal centers. The compounds are reasonably soluble in polar organic solvents and they possess optical absorption spectral properties that are dominated by transitions associated with the polytopic ligand. Weak luminescence is observed for each complex in deoxygenated acetonitrile at room temperature that appears to be characteristic of emission from a metal-to-ligand charge-transfer triplet state. The emission lifetime is essentially independent of temperature, at least over a modest range. There is no indication for interaction between close-lying triplet states and no obvious sign of a low-energy π, π* triplet associated with the polytopic ligand. The photophysical properties suggest that the longer arrays are segmented.

Publication metadata

Author(s): Harriman A, Khatyr A, Ziessel R

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: International Symposium on Photochemistry in Supra-Molecular Environments for Artifical Photosynthesis

Year of Conference: 2007

Pages: 49-62

ISSN: 0922-6168

Publisher: Research on Chemical Intermediates, Springer


DOI: 10.1163/156856707779160744

Library holdings: Search Newcastle University Library for this item

ISBN: 15685675