Design of a magnetic bistability molecular system constructed by H-bonding and π⋯π-stacking interactions

X. M. Ren, S. Nishihara, T. Akutagawa, S. Noro, T. Nakamura

研究成果: Article査読

60 被引用数 (Scopus)

抄録

Crystal structures and magnetic properties were determined for two novel polymorphs of the complex [H2DABCO]-[Ni(mnt)2] [(H 2DABCO)2+ = diprotonated 1,4-diazabicyclo[2.2.2]octane; mnt2- = maleonitriledithiolate]. For each polymorph, anions form a layered structure in which two kinds of dimers were observed. The adjacent anionic sheets are held together by cations via H-bonding interactions between protons of cations and CN groups of anions. Two polymorphs possess spin bistability; namely, upon cooling, a magnetic transition happens at around 120 K with about 1 K hysteresis on heating for the α phase and at 112 K with about 10 K hysteresis for the β phase. Above the transition, the magnetic behaviors of two polymorphs can be approximately interpreted by a singlet-triplet model of an antiferromagnetically coupled S = 1/2 dimer, which is supported by the crystal structures and spin dimer analyses based on extended Hückel molecular orbital calculations.

本文言語English
ページ(範囲)2229-2234
ページ数6
ジャーナルInorganic chemistry
45
5
DOI
出版ステータスPublished - 2006 3 6
外部発表はい

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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