Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 6, Pages 2251-2255Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201911965
Keywords
host-guest systems; isomers separation; leaning pillar[6]arene; nonporous adaptive crystals; supramolecular chemistry
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Funding
- National Natural Science Foundation of China [21871108]
- Jilin Province-University Cooperative Construction Project-Special Funds for New Materials [SXGJSF2017-3]
- Jilin University Talents Cultivation Program
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Haloalkanes are important chemicals in synthetic chemistry and petrochemical industry, but the separation of their isomers is a big hurdle. Herein, we report a facile energy-efficient adsorptive separation strategy using a new class of nonporous adaptive crystals based on leaning pillar[6]arene. Desolvated perethylated leaning pillar[6]arene crystals (EtLP6) with interesting nonporous character show a preference for 1-bromoalkane isomers over 2-bromoalkane isomers. EtLP6 is capable of separating 1-bromopropane, 1-bromobutane, and 1-bromopentane from the corresponding 1:1 (v/v) mixtures of 1/2-positional isomers with purities from 89.6 % to 96.3 % in only one adsorption cycle. The selectivity is endowed by the different host-guest binding modes and different stabilities of EtLP6 crystalloids loaded with 1- and 2-positional isomers. Significantly, the guest-adsorbed assemblies are highly stable at room temperature and EtLP6 can be reused many times without any decrease in performance.
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