Rhenium diimine complex irradiation

Lo and co-workers reported the synthesis, characterisation, photophysical and electrochemical properties of luminescent rhenium(I) diimine indole complexes [Re(N"N)(CO)3(py-indole)]+ (36) [75,76]. Upon visible-fight irradiation, the complexes exhibited 3MLCT (dTt(Re) —> Tt (N N)) emission in fluid solutions at 298 K and in low-temperature glass. When these com-... 

These complexes also usually exhibit substantial photostability under visible light irradiation and, due to their relatively long-lived triplet excited-state characteristics, the emission lifetimes are easily quenched by bimolecular electron- and/or energy-transfer processes in solution [6, 76], The electronic structures of MLCT excited molecules of diimine rhenium(I) tricarbonyl complexes can be viewed as a charge-separated species, [LRen(CO)3(diimine ")], with an essentially oxidized... 

Lo and co-workers synthesised a series of rhenium(I) polypyridine isothiocyanate [Re(NAN)(CO)3(py-3-NCS)]+ (7) [26] and maleimide [Re(NAN)(CO)3 (py-3-mal)]+ (8) [27] complexes that can act as biological labels. Similar to most rhenium(I) diimines, irradiation of all the complexes results in intense and long-lived 3MLCT (dir(Rc) —> ir (NAN)) emission. The isothiocyanate complex [Re(phen)(CO)3(py-3-NCS)]+ has been used to label a universal M13 reverse sequencing primer that has been modified with an aminohexyl group at the 5 -end,... 

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