Issue 4, 2019

Variable oxidation state sulfur-bridged bithiazole ligands tune the electronic properties of ruthenium(ii) and copper(i) complexes

Abstract

The synthesis of homoleptic and heteroleptic ruthenium(II) and copper(I) complexes containing sulfur-bridged bithiazole ligands of varying oxidation states are reported. The complexes have been characterized using 1D and 2D NMR spectroscopy, X-ray single crystal diffraction, electrochemistry, UV-vis absorbance and fluorescence spectroscopy. The stability, photophysical and electrochemical properties were found to be dependent on the oxidation state of the non-coordinating sulfur. The ruthenium and copper species were found to be non-emissive in solution at room temperature, though all displayed weak emission when doped in a PMMA matrix, which increased in intensity on cooling to 77 K. The electrochemical HOMO–LUMO gap was found to be dependent on the oxidation state of the sulfur in the bridging ligand in all complexes, illustrating an additional handle for tuning electrochemical properties.

Graphical abstract: Variable oxidation state sulfur-bridged bithiazole ligands tune the electronic properties of ruthenium(ii) and copper(i) complexes

Supplementary files

Article information

Article type
Paper
Submitted
19 Nov 2018
Accepted
14 Dec 2018
First published
04 Jan 2019

Dalton Trans., 2019,48, 1263-1274

Variable oxidation state sulfur-bridged bithiazole ligands tune the electronic properties of ruthenium(II) and copper(I) complexes

E. Caron, C. M. Brown, D. Hean and M. O. Wolf, Dalton Trans., 2019, 48, 1263 DOI: 10.1039/C8DT04588G

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