An Adaptive Hydrogen-Bonded Organic Framework for the Exclusive Recognition of p-Xylene

被引:33
作者
Ma, Li [1 ]
Xie, Yi [1 ]
Khoo, Rebecca Shu Hui [2 ]
Arman, Hadi [1 ]
Wang, Bin [1 ]
Zhou, Wei [3 ]
Zhang, Jian [2 ]
Lin, Rui-Biao [4 ]
Chen, Banglin [1 ]
机构
[1] Univ Texas San Antonio, Dept Chem, One UTSA Circle, San Antonio, TX 78249 USA
[2] Lawrence Berkeley Natl Lab, Mol Foundry, Organ & Macromol Synth Facil, One Cyclotron Rd,MS 67R6110, Berkeley, CA 94720 USA
[3] NIST, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA
[4] Sun Yat Sen Univ, Sch Chem, MOE Key Lab Bioinorgan & Synthet Chem, Guangzhou 510006, Peoples R China
基金
美国国家科学基金会;
关键词
hydrogen-bonded organic framework; microporous materials; p-xylene recognition; SEPARATION; ISOMERS; SELECTIVITY;
D O I
10.1002/chem.202104269
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Separation of xylene isomers is one of the most important but most challenging and energy-intensive separation processes in the petrochemical industry. Here, we report an adaptive hydrogen-bonded organic framework (HOF-29) constructed from a porphyrin based organic building block 4,4 ',4 '',4 '''-(porphyrin-5,10,15,20-tetrayl) tetrabenzonitrile (PTTBN), exhibiting the exclusive molecular recognition of p-xylene (pX) over its isomers of o-xylene (oX) and m-xylene (mX), as clearly demonstrated in the single crystal structure transformation and H-1 NMR studies. Single crystal structure studies show that single-crystal-to-single-crystal transformation from the as-synthesized HOF-29 to the pX exclusively included HOF-29 superset of pX is triggered by the encapsulation of pX molecules, accompanied by sliding of the 2D layers and local distortion of the ligand, which provides multiple C-H...pi interactions.
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页数:5
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