Substituent Effects on the Electrochemistry and Electronic Coupling of Terphenyl-Bridged Cyclometalated Ruthenium-Amine Conjugated Complexes.

ABSTRACT: Six terphenyl-bridged cyclometalated ruthenium-amine conjugated complexes 4(PF₆)-9(PF₆) were synthesized and studied. Three different substituents, methoxy, methyl, and chloro, were used to vary the electronic nature of the amine unit, and two terminal ligands 2,2':6',2″-terpyridine (tpy) and trimethyl-4,4',4″-tricarboxylate-2,2':6',2″-terpyridine (Me₃tctpy) were used to tune the electronic nature of the ruthenium component. All complexes, except 7(PF₆) with the methoxy substituent and Me₃tctpy ligand, display two well-separated redox waves in the potential range of +0.5 to +1.1 V versus Ag/AgCl. The regular electrochemical changes of these complexes help to establish the oxidation order of ruthenium and amine and

SUBMITTER: Li ZJ 

PROVIDER: S-EPMC6643824 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature