High-Temperature Spin Crossover in Two Solvent-Free Coordination Polymers with Unusual High Thermal Stability

Autor:	Yan-Cong Chen, Wei Liu, Xin Bao, Zhao-Ping Ni, Yu-Lian Qin, Jin-Yan Li, Ming-Liang Tong
Rok vydání:	2015
Předmět:	Diffraction chemistry.chemical_classification Thermogravimetric analysis Denticity Spin transition Polymer Inorganic Chemistry chemistry.chemical_compound Crystallography chemistry Spin crossover Pyridine Organic chemistry Thermal stability Physical and Theoretical Chemistry
Zdroj:	Inorganic Chemistry. 54:3006-3011
ISSN:	1520-510X 0020-1669
Popis:	Two solvent-free two-dimensional (2D) coordination polymers, (2)∞[Fe(ptim)2] (1) and (2)∞[Fe(ptpy)2] (2) (Hptim = 2-(5-(4-(1H-imidazol-1-yl)phenyl)-4H-1,2,4-triazol-3-yl)pyridine; Hptpy = 2-(5-(4-(pyridin-3-yl)phenyl)-4H-1,2,4-triazol-3-yl)pyridine), have been successfully prepared by solvothermal reactions. Their iron atoms are bridged by the corresponding multidentate anionic ligands into dense neutral structures. The magnetic data reveal that complexes 1 and 2 are rare examples exhibiting reversible one-step high-temperature spin crossover behaviors with spin transition temperatures of 419 and 416 K, respectively. Moreover, these structures also display remarkable thermal stability up to 714 K (for 1) and 690 K (for 2), which are confirmed by thermogravimetric and variable-temperature powder X-ray diffraction analyses.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1999f5abcd2190f314238ef7ffde9147 https://doi.org/10.1021/acs.inorgchem.5b00119 Zobrazit plný text záznamu