Copper(ii)-terbium(iii) Single-Molecule Magnets linked by photochromic ligands

Takuya Shiga, Hitoshix Miyasaka, Masahiro Yamashita, Masakazu Morimoto, Masahiro Irie

Research output: Contribution to journalArticlepeer-review

68 Citations (Scopus)

Abstract

Two assemblies composed of single-molecule magnets (SMMs) linked by photochromic ligands, [CuII2TbIII 2(L)2(NO3)2(dae-o) 2]·2(n-BuOH) (1) and {[CuIITbIII(L)(n- BuOH)0.5]2(dae-c)3}·5(DMF)·4(n- BuOH)·2(H2O) (2), were synthesized by reacting the SMM [CuIITbIII(L)(NO3)3] (H2L = 1,3-bis((3-methoxysalicylidene)amino)propane) and photochromic molecules, H2dae-o and H2dae-c, which are open- and closed-ring isomers of 1,2-bis(5-carboxyl-2-methyl-3-thienyl)perfluoropentene (H 2dae), respectively. 1 has a tetranuclear ring-like structure comprised of two [CuTb] units and two dae-o2- ligands. On the other hand, 2 has a one-dimensional ladder-type structure involving the [CuTb] and dae-c2- units in a 3:2 ratio. Magnetic studies revealed that 1 and 2 had ferromagnetic interactions between the CuII and TbIII ions and that both compounds exhibited frequency dependence of ac susceptibilities owing to freezing the magnetization of the [CuTb] SMM. Upon irradiation with ultraviolet light and visible light, an absorption band at ∼600 nm changed, indicating that photochromic reactions involving the dae2- ligands occurred. After irradiation, the magnetic behaviour of 1 did not change, whereas magnetic behaviour of 2 changed, due to the modification of intermolecular environment.

Original languageEnglish
Pages (from-to)2275-2282
Number of pages8
JournalDalton Transactions
Volume40
Issue number10
DOIs
Publication statusPublished - 2011 Mar 14

ASJC Scopus subject areas

  • Inorganic Chemistry

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