Issue 29, 2016

Chemical consequences of pyrazole orientation in RuII complexes of unsymmetric quinoline–pyrazole ligands

Abstract

A series of homoleptic RuII complexes including the tris-bidentate complexes of a new bidentate ligand 8-(1-pyrazol)-quinoline (Q1Pz) and bidentate 8-(3-pyrazol)-quinoline (Q3PzH), as well as the bis-tridentate complex of bis(quinolinyl)-1,3-pyrazole (DQPz) was studied. Together these complexes explore the orientation of the pyrazole relative to the quinoline. By examining the complexes structurally, photophysically, photochemically, electrochemically, and computationally by DFT and TD-DFT, it is shown that the pyrazole orientation has a significant influence on key properties. In particular, its orientation has noticeable effects on oxidation and reduction potentials, photostability and proton sensitivity, indicating that [Ru(Q3PzH)3]2+ is a particularly good local environment acidity-probe candidate.

Graphical abstract: Chemical consequences of pyrazole orientation in RuII complexes of unsymmetric quinoline–pyrazole ligands

Supplementary files

Article information

Article type
Paper
Submitted
18 Mar 2016
Accepted
20 May 2016
First published
23 May 2016
This article is Open Access
Creative Commons BY-NC license

Dalton Trans., 2016,45, 11723-11732

Chemical consequences of pyrazole orientation in RuII complexes of unsymmetric quinoline–pyrazole ligands

J. Hedberg Wallenstein, L. A. Fredin, M. Jarenmark, M. Abrahamsson and P. Persson, Dalton Trans., 2016, 45, 11723 DOI: 10.1039/C6DT01070A

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