Ting Wang, Liang Yu, Mao Ye, Chenghua Deng, En Lin, Yu Zhang, Kaiyuan Wang, Shubo Geng*, Yao Chen, Peng Cheng, Zhihua Qiao, Hao Wang and Zhenjie Zhang*,
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Highly Efficient Separation of Hexane Isomers by Rigid-Flexible Pyrazine-Pillar Ultramicroporous Metal–Organic Framework
Separating linear, monobranch, and dibranch alkanes is a pivotal process in the petrochemical industry. Herein, we present an ultramicroporous metal–organic framework (MOF) with a rigid-flexible structure. Single-component adsorption isotherms demonstrate that this MOF exhibited high capacities for hexane (nHEX) and 3-methylpentane (3MP), whereas excluding 2,2-dimethylbutane (22DMB), resulting in remarkable uptake ratios for nHEX/22DMB (19.2) and 3MP/22DMB (12.6) at 303 K, surpassing those of most reported MOFs. Breakthrough results with the nHEX/3MP/22DMB ternary mixture further validate its excellent separation performance and good reusability. Single-crystal structure data of MOF adsorbing gas molecules reveal that the outstanding performance can be ascribed to its suitable pore size and guest-induced flexibility, with an adaptive backbone triggered by nHEX and 3MP, leading to strong affinities for these molecules and precisely locating their positions within the framework.
期刊介绍：
ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.
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