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Luminescent rhenium(I) complexes of substituted imidazole[4,5-f]-1,10-phenanthroline derivatives

Bonello, Rhodri Owen, Morgan, Ian Rhys, Yeo, Benjamin Roy, Jones, Lucy E. J., Kariuki, Benson, Fallis, Ian Andrew and Pope, Simon J. A. 2014. Luminescent rhenium(I) complexes of substituted imidazole[4,5-f]-1,10-phenanthroline derivatives. Journal of Organometallic Chemistry 749 , pp. 150-156. 10.1016/j.jorganchem.2013.08.031

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Seven new chromophoric ligands (L1–L7), based upon the fused imidazo[4,5-f]-1,10-phenanthroline core, were dually functionalised with a variety of aryl substituents of varying character, and can be synthesised utilising a one-pot methodology. The resultant ligands are fluorescent (λem = 408–425 nm) and amenable to further reactivity with pentacarbonylbromorhenium to give coordination complexes of the form fac-[ReBr(CO)3(NˆN)] (where NˆN = L1–L7). The complexes have been fully characterised using a variety of spectroscopic and analytical techniques, and structurally confirmed for three examples using X-ray diffraction studies. These new rhenium complexes are all luminescent, revealing classical 3MLCT emission in aerated solution; the complexes show that the 3MLCT excited state is moderately sensitive to the nature of functionalisation of the chelated imidazo[4,5-f]-1,10-phenanthroline ligand.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Subjects: Q Science > QD Chemistry
Uncontrolled Keywords: Rhenium; Diimine; Luminescence
Publisher: Elsevier
ISSN: 0022-328X
Last Modified: 18 Feb 2019 11:06

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