Prev. Article Next Article Table of Contents

Communication

Coordination-Tuned Single-Molecule-Magnet Behavior of Tb^III−Cu^II Dinuclear Systems

Supporting Info

Takashi Kajiwara*^†, Motohiro Nakano*^‡, Shinya Takaishi^† and Masahiro Yamashita^†

Department of Chemistry, Graduate School of Science, Tohoku University, and CREST, Japan Science and Technology Agency (JST), Aramaki, Aoba-ku, Sendai 980-8578, Japan, and Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan

Inorg. Chem., 2008, 47 (19), pp 8604–8606

DOI: 10.1021/ic8013656

Publication Date (Web): August 29, 2008

* To whom correspondence should be addressed. E-mail: kajiwara@agnus.chem.tohoku.ac.jp (T.K.), moto@ch.wani.osaka-u.ac.jp (M.N.).

†

Tohoku University.

‡

Osaka University.

Abstract

Tb^III−Cu^II-based single-molecule magnet (SMM) and non-SMM were synthesized to investigate the relationship between magnetic anisotropy and the symmetry of the ligand field by the reaction of [TbCu(o-vanilate)₂(NO₃)₃] with methoxypropylamine (MeOC₃H₆NH₂, 1) or ethoxyethylamine (EtOC₂H₄NH₂, 2). In both complexes, Tb^III ions have a bicapped square-antiprism coordination geometry. When the Tb^III ion is in a less symmetrical ligand field, it has an easy-axis anisotropy and shows SMM behavior, whereas when it is in a more symmetrical environment, it has an easy-plane anisotropy and exhibits non-SMM behavior.