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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.
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
URL: http://dx.doi.org/10.1163/156856707779160744
DOI: 10.1163/156856707779160744
Library holdings: Search Newcastle University Library for this item
ISBN: 15685675
