Citation: Gang LI, Xin-Yu ZHANG, Feng-Li CHEN, Cheng-Cheng ZHANG, Bo-Hong GAO, Hai-Yan WEI, Xin-Yi WANG. Heterogeneous composites with coexisting spin-crossover and long-range magnetic ordering[J]. Chinese Journal of Inorganic Chemistry, ;2023, 39(11): 2197-2208. doi: 10.11862/CJIC.2023.173 shu

Heterogeneous composites with coexisting spin-crossover and long-range magnetic ordering

1.
State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
2.
School of Chemistry and Materials Science, Jiangsu Key Laboratory of Biofunctional Materials, Nanjing Normal University, Nanjing 210023, China

Corresponding author: Hai-Yan WEI, weihaiyan@njnu.edu.cn Xin-Yi WANG, wangxy66@nju.edu.cn
Received Date: 24 May 2023
Revised Date: 6 September 2023

Figures(9)

A facile precipitation transformation method at room temperature was employed to efficiently prepare the FeTrz@PB heterostructural composites containing both[Fe(Htrz)₂(trz)](BF₄) (Htrz=1H-1, 2, 4-triazole) and Prussian blue KFe^Ⅲ[Fe^Ⅱ(CN)₆] with the coexistence of spin crossover (SCO) and long-range magnetic ordering (LRMO). The controllable growth process of these heterostructural composites was fully characterized by scanning electron micro-scope, transmission electron microscope, powder X-ray diffraction, FTIR, X-ray photoelectron spectroscopy, energy-dispersion X-ray analysis, thermogravimetric analysis, and magnetic studies. The size of the PB particles and the appearance of FeTrz@PB can be tuned by controlling the reaction time. Increasing the reaction time leads to the increased ratio of the PB phase in the FeTrz@PB composites. Remarkably, magnetic studies on FeTrz@PB revealed the coexistence of SCO above room temperature (362-392 K) and LRMO at low temperatures (ca. 5.6 K). The high spin (HS) fraction and ZFC/FC intensity gradually increased with the growth time, while the heights of the hysteresis loops decreased gradually.
- spin crossover,
- long-range magnetic ordering,
- precipitation transformation,
- multifunctional magnetic materials
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沈阳化工大学材料科学与工程学院沈阳 110142