Influence of Intermolecular Interactions on Valence Tautomeric Behaviors in Two Polymorphic Dinuclear Cobalt Complexes

Guo Ling Li, Shinji Kanegawa, Zi Shuo Yao, Sheng Qun Su, Shu Qi Wu, You Gui Huang, Soonchul Kang, Osamu Sato

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Two polymorphic structures have been well determined in a valence tautomeric (VT) dinuclear cobalt complex. These polymorphs showed distinct thermal- and photomagnetic behavior, and are thus ideal for studying the “pure” intermolecular factors to VT transitions. In polymorph 1A, the VT cations are arranged head-to-waist with their neighbors and exhibit weak π⋅⋅⋅π interactions, resulting in a gradual and incomplete thermal VT transition. In contrast, the cations in polymorph 1B are arranged head-to-tail and exhibit relatively strong π⋅⋅⋅π interactions, leading to an abrupt and complete thermal VT transition with adjustable hysteresis loop at around room temperature. The VT process for both polymorphs can be induced by light, but the light-excited state of 1B⋅2H2O has a higher thermal relaxation temperature than that of 1A⋅3H2O.

Original languageEnglish
Pages (from-to)17130-17135
Number of pages6
JournalChemistry - A European Journal
Volume22
Issue number48
DOIs
Publication statusPublished - Jan 1 2016

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

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