Two Acentric Mononuclear Molecular Complexes with Unusual Magnetic and Ferroelectric Properties
Abstract
Two acentric, i.e., noncentrosymmetric, mononuclear complexes, Co(5-ATZ) 4Cl 2, 1, and Cu(5-ATZ) 4Cl 2, 2, where 5-ATZ is the monodentate 5-amino-1-H-tetrazole ligand, have been prepared and characterized. Both complexes crystallize in the tetragonal system with the P4nc space group, a member of the polar noncentrosymmetric 4mm class, and thus both 1 and 2 can exhibit ferroelectric and nonlinear optical properties. Magnetic studies indicate that 1 is a paramagnetic high-spin cobalt(II) complex with a rather extensive spin-orbit coupling, modeled as a zero-field splitting parameter, D, of ±91(3) cm -1 and with very weak long-range antiferromagnetic exchange interactions. Direct current (dc) and ac magnetic studies indicate that 2 is a paramagnetic copper(II) complex that exhibits weak ferromagnetic exchange interactions below 15 K. Both 1 and 2 exhibit ferroelectric hysteresis loops at room temperature with remanent polarizations of 0.015 C/cm 2 and coercive electric fields of 5.5 and 5.7 kV/cm, respectively.
Recommended Citation
F. Zhao et al., "Two Acentric Mononuclear Molecular Complexes with Unusual Magnetic and Ferroelectric Properties," Inorganic Chemistry, vol. 51, no. 8, pp. 4862 - 4868, American Chemical Society (ACS), Apr 2012.
The definitive version is available at https://doi.org/10.1021/ic300394c
Department(s)
Chemistry
International Standard Serial Number (ISSN)
0020-1669
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2012 American Chemical Society (ACS), All rights reserved.
Publication Date
01 Apr 2012
Comments
This article is corrected by Correction to Two Acentric Mononuclear Molecular Complexes with Unusual Magnetic and Ferroelectric Properties.