The interplay between fluorescence and phosphorescence with luminescent gold(i) and gold(iii) complexes bearing heterocyclic arylacetylide ligands.

ABSTRACT: The photophysical properties of a series of gold(i) [LAu(C[triple bond, length as m-dash]CR)] (L = PCy₃ (1a-4a), RNC (5a), NHC (6a)) and gold(iii) complexes [Au(C^N^C)(C[triple bond, length as m-dash]CR)] (1b-4b) bearing heterocyclic arylacetylide ligands with narrow band-gap are compared. The luminescence of both series are derived from an intraligand transition localized on the arylacetylide ligand (ππ*(C[triple bond, length as m-dash]CR)) but 1a-3a displayed prompt fluorescence (τ _PF = 2.7-12.0 ns) while 1b-3b showed mainly phosphorescence (τ _Ph = 104-205 μs). The experimentally determined intersystem crossing (ISC) rate constants (k _ISC) are on the order of 10⁶ to 10

SUBMITTER: Chan KT 

PROVIDER: S-EPMC5365001 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature