Photoluminescence of 8-quinolinolato(trioxo) rhenium(VII)

The complex (ReO3)-O-VII(oxinate) (oxine = 8-quinolinol or 8-hydroxyquinoli ne) shows a green fluorescence at lambda (max) = 511 nm with phi = 0.012 an d a very weak red phosphorescence at lambda (max) = 645 nm. Both emissions originate from the lowest-energy pi pi* intraligand state of the oxinate li gand. Owing to the d(0) electron configuration and the high oxidation state of rhenium the heavy atom effect transmitted to the pi -electron system of the oxinate ligand is very weak. (C) 2000 Elsevier Science S.A. All rights reserved.