CHANGES IN THE EXCITED STATE RELAXATION PATHWAY OF MONORUTHENIUM (II) BIPYRIDINE COMPLEXES WITH SUBSTITUTED IMIDAZO[4,5-f][1,10]PHENANTHROLINE LIGANDS UPON INTRODUCTION OF THE SECOND METAL CATION INTO COMPLEX COMPOSITION

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A new type of heterobimetallic ruthenium-containing complexes based on thiophene-, pyridineand phenanthroline-containing ligand has been obtained and investigated. In the studied complexes, ruthenium(II) is bound to the 1,10-phenanthroline moiety and has a marked effect on the optical properties of the complex. The second metal cation is coordinated on the pyridine residue within the phenanthroline ligand. The coordination of the second cation results in a significant quenching of luminescence as a result of redistribution of electron density on the LUMO. It is also shown that the removal of the bridging thiophene fragment from the ligand composition significantly reduces the nucleophilicity of the pyridine nitrogen atom, and the latter loses the ability to coordinate doubly charged cations.

作者简介

A. Botezatu

Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences

Moscow, Russia

S. Tokarev

Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences

Email: tokarev@ineos.ac.ru
Moscow, Russia

Yu. Fedorov

Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences

Moscow, Russia

O. Fedorova

Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences

Moscow, Russia

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