Photophysical and Photobiological Properties of Dinuclear Iridium(III) Bis-tridentate Complexes.

ABSTRACT: A series of cationic dinuclear iridium(III) complexes (Ir1-Ir5) bearing terpyridine-capped fluorenyl bridging ligands and different polypyridyl or cyclometalating terminal tridentate ligands were synthesized, characterized, and evaluated for their photophysical and photobiological activities. The influence of the bridging and terminal ligands on the photophysical properties of the complexes was investigated by UV-vis absorption, emission, and transient absorption spectroscopy and simulated by TDDFT calculations. All of the complexes displayed strong bridging-ligand localized visible ¹π,π* absorption and red- or near-infrared phosphorescence as well as broad triplet excited-state absorption across both visible and NIR wavelengths. These triplet states were assigned as predominant

SUBMITTER: Liu B 

PROVIDER: S-EPMC6337720 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature