Crucial Role of Paramagnetic Ligands for Magnetostructural Anomalies in “Breathing Crystals”

Crucial Role of Paramagnetic Ligands for Magnetostructural Anomalies in “Breathing Crystals” Full article

Journal

Inorganic Chemistry
ISSN: 0020-1669

Output data

Year: 2012, Volume: 51, Number: 17, Pages: 9385-9394 Pages count : 10 DOI: 10.1021/ic301149e

Authors

Tretyakov Evgeny V. ¹ , Tolstikov Svyatoslav E. ¹ , Suvorova Anastasiya O. ¹ , Polushkin Aleksey V. ¹ , Romanenko Galina V. ¹ , Bogomyakov Artem S. ¹ , Veber Sergey L. ¹ , Fedin Matvey V. ¹ , Stass Dmitry V. ² , Reijerse Edward ³ , Lubitz Wolfgang ³ , Zueva Ekaterina M. ⁴ , Ovcharenko Victor I. ¹

Affiliations

1	International Tomography Center, Siberian Branch of the Russian Academy of Sciences, Institutskaya Street, 630090 Novosibirsk, Russian Federation.
2	Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences
3	Max-Planck-Institut für chemische Energiekonversion, 45470 Mülheim/Ruhr, Germany
4	Department of Inorganic Chemistry, Kazan State Technological University,

Breathing crystals based on polymer-chain complexes of Cu(hfac)2 with nitroxides exhibit thermally and lightinduced magnetostructural anomalies in many aspects similar to a spin crossover. In the present work, we report the synthesis and investigation of a new family of Cu(hfac)2 complexes with tert-butylpyrazolylnitroxides and their nonradical structural analogues. The complexes with paramagnetic ligands clearly exhibit structural rearrangements in the copper(II) coordination units and accompanying magnetic phenomena characteristic for breathing crystals. Contrary to that, their structural analogues with diamagnetic ligands do not undergo rearrangements in the copper(II) coordination environments. This confirms experimentally the crucial role of paramagnetic ligands and exchange interactions between them and copper(II) ions for the origin of magnetostructural anomalies in this family of molecular magnets.

Tretyakov E.V. , Tolstikov S.E. , Suvorova A.O. , Polushkin A.V. , Romanenko G.V. , Bogomyakov A.S. , Veber S.L. , Fedin M.V. , Stass D.V. , Reijerse E. , Lubitz W. , Zueva E.M. , Ovcharenko V.I.
Crucial Role of Paramagnetic Ligands for Magnetostructural Anomalies in “Breathing Crystals”
Inorganic Chemistry. 2012. V.51. N17. P.9385-9394. DOI: 10.1021/ic301149e WOS Scopus

Published print:

Sep 3, 2012

Web of science:	WOS:000308258700034
Scopus:	2-s2.0-84865736408

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