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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 and obtained from the reaction of a bis(pyridinemethyl)amine substituted spiropyran with yttrium(III) or dysprosium(III) triflate salts, which structures were confirmed both in 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 single molecule magnet behavior of the dysprosium complex and to probe the changes in the dysprosium ion local environment upon photo-isomerization.

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Publication details

The article was received on 23 Jan 2018, accepted on 02 Feb 2018 and first published on 05 Feb 2018


Article type: Paper
DOI: 10.1039/C8DT00299A
Citation: Dalton Trans., 2018, Accepted Manuscript
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    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, Accepted Manuscript , DOI: 10.1039/C8DT00299A

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