Issue 3, 2016

Spin-crossover in a homoleptic cobalt(ii) complex containing a redox-active NNO ligand

Abstract

We report the preparation of a divalent cobalt complex containing the ligand 1-(2-pyridylazo)-2-phenanthrol (papl). The complex is neutral and homoleptic containg two equivalents of the anion of papl. Variable temperature magnetic susceptibility measurements indicate a gradual spin-crossover between the S = 1/2 and S = 3/2 states of the complex. This is corroborated by single crystal X-ray diffraction experiments at 147 and 325 K, which reveal differences in the coordinate bond distances that are consistent with spin-crossover observed in other cobalt(II) complexes. The complex is redox-active and features intense, ligand-centered visible absorptions bands, which are completely changed in alcohol solvents (methanol, ethanol) and indicate oxidation of the complex to cobalt(III) in these polar, protic solvents.

Graphical abstract: Spin-crossover in a homoleptic cobalt(ii) complex containing a redox-active NNO ligand

Supplementary files

Article information

Article type
Paper
Submitted
30 सितम्बर 2015
Accepted
08 दिसम्बर 2015
First published
08 दिसम्बर 2015

J. Mater. Chem. C, 2016,4, 455-459

Spin-crossover in a homoleptic cobalt(II) complex containing a redox-active NNO ligand

R. A. Taylor, A. J. Lough and M. T. Lemaire, J. Mater. Chem. C, 2016, 4, 455 DOI: 10.1039/C5TC03137K

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements