Synthesis, Structures, and Magnetic Properties of Two Coordination Assemblies of Mn(III) Single Molecule Magnets Bridged via Photochromic Diarylethene Ligands

Ahmed Fetoh, Goulven Cosquer, Masakazu Morimoto, Masahiro Irie, Ola El-Gammal, Gaber M. Abu El-Reash, Brian K. Breedlove, Masahiro Yamashita

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Two new coordination assemblies were prepared by combining the open and close forms of 1,2-bis(5-carboxyl-2-methyl-3-thienyl)perfluorocyclopentene (H 2 dae) with [Mn 2 (saltmen) 2 (H 2 O) 2 ](PF 6 ) 2 , where H 2 saltmen = 2,2′-((1E,1′E)-((2,3-dimethylbutane-2,3-diyl)bis(azaneylylidene)) bis(methaneylylidene))diphenol. From X-ray diffraction analyses, the complexes had the following formula: [Mn 2 (saltmen) 2 (dae-open)] (1 open ) and [Mn(saltmen)(dae-close)]·H 2 O·Et 3 N (1 close ). Both complexes crystallized in the C2/c monoclinic space group. In 1 open , dae-o 2- behaves as a bidentate ligand attached to the outer Mn-saltmen monomer via the oxygen atom of carboxylato groups, whereas in 1 close , the dae-c 2- ligand behaves as a monodentate ligand attached to the external Mn-saltmen dimer by only one carboxylato group of the photochromic ligand. The complexes showed reversible photochromic responses to UV/vis light and showed single-molecule magnet-like behavior. The relaxation times and energy barriers of the metal complexes are clearly affected by UV/vis irradiation.

Original languageEnglish
Pages (from-to)2307-2314
Number of pages8
JournalInorganic chemistry
Volume58
Issue number4
DOIs
Publication statusPublished - 2019 Feb 18

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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