@article{Wang2021, 
author = {Zhuo Wang and Li-Peng Zhou and Li-Xuan Cai and Chong-Bin Tian and Qing-Fu Sun},
title = {From a mononuclear FeL2 complex to a Fe4L4 molecular square: Designed assembly and spin-crossover property},
year = {2021},
journal = {Nano Research},
volume = {14},
number = {2},
pages = {398-403},
keywords = {iron, spin-crossover compound, molecular square, coordination-directed self-assembly, supramolecular chemistry},
url = {https://www.sciopen.com/article/10.1007/s12274-020-2777-x},
doi = {10.1007/s12274-020-2777-x},
abstract = {By introduction of a new Fe(L1)2 spin-crossover (SCO) unit into the polynuclear system, a nano-scale Fe4(L2)4 molecular square architecture is designed through coordination-directed self-assembly strategy. Both the mononuclear Fe(L1)2 and tetranuclear Fe4(L2)4 complexes have been structurally confirmed by 1H nuclear magnetic resonance (NMR), electrospray ionization time-of-flight mass spectrometry (ESI-TOF-MS), and temperature-dependent single crystal X-ray diffraction studies. Variable-temperature magnetic susceptibility measurements reveal the presence of an abrupt SCO behavior with a thermal hysteresis width of 4 K for Fe(L1)2. By clear contrast, Fe4(L2)4 undergoes a gradual spin transition behavior with enlarged thermal hysteresis width and higher spin transition temperature.}
}