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Spin-Crossover Phenomena of Ni(cyclam)I2 Complex: Magnetostructural Correlations in Two Polymorphs

preprint
submitted on 25.12.2018 and posted on 26.12.2018 by Yoji Horii, Yuki Kanegae, Kiyonori Takahashi, Akira Fuyuhiro, Hal Suzuki, Motohiro Nakano
Two crystal polymorphs of Ni(cyclam)I2 (cyclam = 1,4,8,11-
tetraazacyclotetradecane) were identified by X-ray structural analysis and their magnetic properties were investigated. Gradual spin-crossover behaviors were found in both polymorphs. Entropy differences between high- and low-spin states obtained by assuming the spin equilibrium model reflected subtle difference of the coordination environment of nickel(II) ion in two polymorphs.

Funding

Examination of "orbiting-ion paramagnetism" in endohedral lithium(+) fullerene [Li+@C60](PF6)- crystal

Japan Society for the Promotion of Science

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Verification of chiral inversion phase transition phenomenon accompanying two-dimensional high density integration of molecular rotor

Japan Society for the Promotion of Science

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History

Email Address of Submitting Author

horiiy17@chem.sci.osaka-u.ac.jp

Institution

Research Center for Structural Thermodynamics, Graduate School of Science, Osaka University

Country

Japan

ORCID For Submitting Author

0000-0002-4789-6858

Declaration of Conflict of Interest

The authors have no conflicts of interest to declare.

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