@article{Li2021, 
author = {Shulin Li and Shilin Zeng and Yuyang Tian and Xiaofei Jing and Fuxing Sun and Guangshan Zhu},
title = {Two flexible cationic metal-organic frameworks with remarkable stability for CO2/CH4 separation},
year = {2021},
journal = {Nano Research},
volume = {14},
number = {9},
pages = {3288-3293},
keywords = {metal-organic frameworks (MOFs), cationic MOFs, flexibility, gas adsorption, carbon dioxide},
url = {https://www.sciopen.com/article/10.1007/s12274-021-3329-8},
doi = {10.1007/s12274-021-3329-8},
abstract = {Cationic azole-based metal-organic frameworks (MOFs) with remarkable stability and unique pore environment have aroused great research interests. Meanwhile, flexible MOFs which can undergo pore-structure changes upon exposure to external stimuli are ideal materials for gas separation. However, introducing flexibility into the framework of cationic azole-based MOFs is rarely reported. Herein, we synthesized two stable isomorphic cationic MOFs (M-btz-as, M = Co, Ni) based on a linear azole ligand. After activated at high temperature under vacuum, M-btz-ht (M = Co, Ni) were obtained and both MOFs exhibited flexible features in which Co-btz is more flexible than Ni-btz. Different solvent-mediated activation methods were employed to explore their effects on structural flexibility and produced MOFs with different phases. Continuous phase transformation of Co-btz-e was verified by powder X-ray diffraction. In addition, these MOF phases possessed different gas separation abilities affected by their flexible frameworks, and Co-btz-ht exhibited the highest CO2/CH4 separation ability.}
}