Issue 12, 2018

trans to cis photo-isomerization in merocyanine dysprosium and yttrium complexes

Abstract

We report the synthesis of two lanthanide complexes including a chelating merocyanine (MC) ligand obtained from the reaction of a bis(pyridinemethyl)amine substituted spiropyran with yttrium(III) or dysprosium(III) triflate salts, whose structures were confirmed both in the solid state and in solution by single crystal X-ray diffraction studies and NMR investigations. The obtained merocyanine metal complexes can reversibly undergo a photo-triggered transformation consisting of a partial isomerization of the trans-merocyanine ligand to its cis isomer (cis-MC) providing complexes in which the metal–phenolate bond is retained. SQUID magnetometry experiments in combination with ab initio calculations were used to evidence and rationalize the single-molecule magnet behavior of the dysprosium complex and to probe the changes in the dysprosium ion local environment upon photo-isomerization.

Graphical abstract: trans to cis photo-isomerization in merocyanine dysprosium and yttrium complexes

Supplementary files

Article information

Article type
Paper
Submitted
23 Jan 2018
Accepted
02 Feb 2018
First published
05 Feb 2018

Dalton Trans., 2018,47, 4139-4148

trans to cis photo-isomerization in merocyanine dysprosium and yttrium complexes

P. Selvanathan, V. Dorcet, T. Roisnel, K. Bernot, G. Huang, B. Le Guennic, L. Norel and S. Rigaut, Dalton Trans., 2018, 47, 4139 DOI: 10.1039/C8DT00299A

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