Rhenium (I) tricarbonyl complexes have garnered a reputation for displaying rich luminescent properties. Synthesis of these complexes with diimine based ligands having substituents of varying electron withdrawing or donating abilities allows tuning of their luminescent properties. Previous studies of such rhenium (I) tricarbonyl complexes with bipyridine derivatives have revealed emission at ~530 nm. Such complexes have also been shown to undergo luminescent quenching or enhancement as a consequence of anion interactions.  In this study, we focus on the synthesis of urea, thiourea, and amidothiourea based ligands and their molecular recognition abilities when tethered to rhenium (I) tricarbonyl complexes. Analysis of these complexes indicated variations in luminescent properties that correlated directly to the attached ligands. The selectivity of the anions for binding depends on the geometry factors, anion size and of the acidity of both ligands and anions.

Luminescent analysis and anion sensing studies of urea and amidothiourea based rhenium (I) complexes

251st National Meeting (2016)

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