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Synthesis and characterisation of phosphorescent rhenium(I) complexes of hydroxy- and methoxy-substituted imidazo[4,5- f ]-1,10-phenanthroline ligands

Bonello, R. Owen, Pitak, Mateusz B., Coles, Simon J., Hallett, Andrew J., Fallis, Ian Andrew and Pope, Simon J. A. 2017. Synthesis and characterisation of phosphorescent rhenium(I) complexes of hydroxy- and methoxy-substituted imidazo[4,5- f ]-1,10-phenanthroline ligands. Journal of Organometallic Chemistry 841 , pp. 39-47. 10.1016/j.jorganchem.2017.04.021

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Abstract

Eight new fluorescent ligands (L1-L8) derived from the fused imidazo[4,5-f]-1,10-phenanthroline core, have been synthesised utilising a one-pot methodology. The ligands include two points of structural variety, allowing multiply-substituted aryl groups (including hydroxy and methoxy moieties) to be attached to the ligand core. The ligands L1-L8 are fluorescent (λem = 399–426 nm) and react with pentacarbonylbromorhenium to give coordination complexes of the form fac-[ReBr(CO)3(NˆN)] (where NˆN = L1-L8). The complexes were characterised using a variety of spectroscopic and analytical techniques, including single crystal X-ray diffraction studies on two examples. The rhenium complexes were all found to be luminescent, revealing classical 3MLCT emission at 579–587 nm in aerated solution with corresponding lifetimes in the range 149–166 ns.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Publisher: Elsevier
ISSN: 0022-328X
Funders: EPSRC
Date of First Compliant Deposit: 14 June 2017
Date of Acceptance: 18 March 2017
Last Modified: 08 Sep 2017 15:07
URI: http://orca.cf.ac.uk/id/eprint/100335

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