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Synthesis, structure, and photophysical and electrochemical properties of Ru(II) complexes of arylene–vinylene terpyridyl conjugates

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Abstract

A series of arylene–vinylene π-conjugated terpyridyl ruthenium(II) complexes, [Ru(PPh3)2Cl(tpy-C6H4–CH[double bond, length as m-dash]CH–Ar)][PF6] (1–4; tpy = 2,2′:6′,2′′-terpyridyl, where Ar = phenyl, tolyl, 1-naphthyl and 9-anthracenyl as substituents at the 4′ position of tpy), have been synthesized and characterized by multinuclear NMR, IR, HRMS and single crystal X-ray crystallography. The influence of the electronic nature of arylene groups on their photophysical and electrochemical properties has been investigated to understand the electronic interaction between the metal–organic redox centers. Furthermore, a σ-donor phenylacetylide group has been incorporated to accomplish [Ph-C[triple bond, length as m-dash]C-Ru(PPh3)2(tpy-C6H4–CH[double bond, length as m-dash]CH–Ar)][PF6] (5–8) complexes by the substitution of a coordinated chloride ligand and to investigate the change in their redox and photophysical properties. DFT studies have been performed to gain an insight into their electronic properties by determining the HOMO–LUMO energy levels and frontier molecular orbitals of all the synthesized Ru(II) complexes.

Graphical abstract: Synthesis, structure, and photophysical and electrochemical properties of Ru(ii) complexes of arylene–vinylene terpyridyl conjugates

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Publication details

The article was received on 07 Mar 2018, accepted on 28 Jun 2018 and first published on 29 Jun 2018


Article type: Paper
DOI: 10.1039/C8DT00881G
Citation: Dalton Trans., 2018, Advance Article
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    Synthesis, structure, and photophysical and electrochemical properties of Ru(II) complexes of arylene–vinylene terpyridyl conjugates

    A. Sil, S. Roy Chowdhury, S. Mishra and S. K. Patra, Dalton Trans., 2018, Advance Article , DOI: 10.1039/C8DT00881G

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