Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 142, Issue 5, Pages 2228-2232Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.9b13548
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Funding
- National Natural Science Foundation of China [21434005]
- fundamental research funds for the central universities
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The separation of benzene and cyclohexane is one of the most challenging tasks in the petrochemical field. However, conventional separation methods suffer from cumbersome operation, huge energy expenditure, or use of entrainers. Herein, we develop an environmentally friendly and energy saving adsorptive separation strategy using nonporous adaptive crystals of a hybrid[3]arene (1). Adaptive 1 crystals separate benzene from an equimolar benzene/cyclohexane mixture with a purity of 97.5%. The selectivity comes from the stability and variability of the new crystal structure upon capture of the preferred guest, benzene. Moreover, reversible transformations between the nonporous guest-free structure and the guest-containing structure make 1 highly recyclable.
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