Slow magnetic relaxation in four square-based pyramidal dysprosium hydroxo clusters ligated by chiral amino acid anions-a comparative study

Thielemann D.T.; Wagner A.T.; Lan Y.Anson C.E.Gamer M.T.Powell A.K.Roesky P.W.

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Slow magnetic relaxation in four square-based pyramidal dysprosium hydroxo clusters ligated by chiral amino acid anions-a comparative study

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The synthesis and characterization of three chiral and one achiral amino acid anion ligated dysprosium hydroxo clusters Dy_5(OH) _5(α-AA)_4(Ph_2acac)_6 (α-AA = d-PhGly, l-Pro, l-Trp, Ph_2Gly; Ph_2acac = dibenzoylmethanide) are reported. The solid state structures were determined using single crystal X-ray diffraction and show that five Dy(iii) ions are arranged in a square-based pyramidal geometry with NO_7-donor-sets for the basal and O_8-donor-sets for the apical Dy atom. Both static (dc) and dynamic (ac) magnetic properties were investigated for all four compounds and show a slow relaxation of magnetization, indicative of single molecule magnet (SMM) behaviour below 10 K in all cases. The similar SMM behaviour observed for all four compounds suggests that the very similar coordination geometries seen for the dysprosium atoms in all members of this family, which are independent of the amino acid ligand used, play a decisive role in steering the contribution of the single ion anisotropies to the observed magnetic relaxation.

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《Dalton transactions: An international journal of inorganic chemistry》 |2013年第41期|14794-14800|共7页
作者
Thielemann D.T.; Wagner A.T.; Lan Y.Anson C.E.Gamer M.T.Powell A.K.Roesky P.W.;
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作者单位

Institut für Anorganische Chemie, Karlsruher Institut für Technologie (KIT), Engesserstr. 15 Geb. 30.45, 76131 Karlsruhe, Germany;

Institut für Nanotechnologie, Karlsruher Institut für Technologie (KIT), Postfach 3640, D-76021 Karlsruhe, Germany;

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正文语种英语
中图分类化学;无机化学;
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relaxation; dysprosium; comparative;

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1. Slow Magnetic Relaxation Observed in Dysprosium Compounds Containing Unsupported Near-Linear Hydroxo- and Fluoro-Bridges [J] . Brunet Gabriel, Habib Fatemah, Korobkov IliaMurugesu Muralee Inorganic Chemistry: A Research Journal that Includes Bioinorganic, Catalytic, Organometallic, Solid-State, and Synthetic Chemistry and Reaction Dynamics . 2015,第13期

机译：Slow Magnetic Relaxation Observed in Dysprosium Compounds Containing Unsupported Near-Linear Hydroxo- and Fluoro-Bridges
2. New structural form of a tetranuclear lanthanide hydroxo cluster: Dy 4 analogue display slow magnetic relaxation [J] . Jami A.K., Baskar V., Sa?udo E.C. Inorganic Chemistry: A Research Journal that Includes Bioinorganic, Catalytic, Organometallic, Solid-State, and Synthetic Chemistry and Reaction Dynamics . 2013,第5期

机译：New structural form of a tetranuclear lanthanide hydroxo cluster: Dy 4 analogue display slow magnetic relaxation
3. X-ray studies on crystalline complexes involving amino acids and peptides: Part XVIII. Crystal structure of a new form of L-arginine D-glutamate and a comparative study of amino acid crystal structures containing molecules of the same and mixed chirality [J] . JayashreeSoman, M.Vijayan journal of biosciences . 1989,第2期

机译：X-ray studies on crystalline complexes involving amino acids and peptides: Part XVIII. Crystal structure of a new form of L-arginine D-glutamate and a comparative study of amino acid crystal structures containing molecules of the same and mixed chirality

Slow magnetic relaxation in four square-based pyramidal dysprosium hydroxo clusters ligated by chiral amino acid anions-a comparative study

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