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Encapsulation of Halocarbons in a Tetrahedral Anion Cage
Author(s) -
Yang Dong,
Zhao Jie,
Zhao Yanxia,
Lei Yibo,
Cao Liping,
Yang XiaoJuan,
Davi Martin,
de Sousa Amadeu Nader,
Janiak Christoph,
Zhang Zhibin,
Wang YaoYu,
Wu Biao
Publication year - 2015
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201502399
Subject(s) - chemistry , supramolecular chemistry , halocarbon , cage , ion , solid state , tris , ligand (biochemistry) , crystallography , covalent bond , crystal engineering , tetrahedron , crystal structure , stereochemistry , organic chemistry , combinatorics , biochemistry , receptor , mathematics
Caged supramolecular systems are promising hosts for guest inclusion, separation, and stabilization. Well‐studied examples are mainly metal‐coordination‐based or covalent architectures. An anion‐coordination‐based cage that is capable of encapsulating halocarbon guests is reported for the first time. This A 4 L 4 ‐type (A=anion) tetrahedral cage, [(PO 4 ) 4 L 4 ] 12− , assembled from a C 3 ‐symmetric tris(bisurea) ligand ( L ) and phosphate ion (PO 4 3− ), readily accommodates a series of quasi‐tetrahedral halocarbons, such as the Freon components CFCl 3 , CF 2 Cl 2 , CHFCl 2 , and C(CH 3 )F 3 , and chlorocarbons CH 2 Cl 2 , CHCl 3 , CCl 4 , C(CH 3 )Cl 3 , C(CH 3 ) 2 Cl 2 , and C(CH 3 ) 3 Cl. The guest encapsulation in the solid state is confirmed by crystal structures, while the host–guest interactions in solution were demonstrated by NMR techniques.