Supramolecular assemblages from uranyl complexes of calixarenes and potassium complexes of 18-crown-6 or dibenzo-18-crown-6 |
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| Affiliation: | 1. Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China;2. Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210046, China |
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| Abstract: | Reaction of uranyl nitrate with p-tert-butyl[3.1.3.1]homocalixarene (L1H4) or p-tert-butylcalix[8]arene (L2H8) has been carried out in the presence of KOH and 18-crown-6 (18C6) or dibenzo-18-crown-6 (db18C6), giving the supramolecular assemblages [K(db18C6)(H2O)2]3 [{UO2(L1)}2K(H2O)5] (1) and [K(18C6)(OH)2][{(UO2)2(L2H5)(OH)}{K(18C6)}] (2). Compound 1 comprises a sandwich, “complex-within-complex” assemblage in which two uranyl/calixarene complexes encompass a potassium/crown ether guest. A direct bond between uranyl and K(18C6) is present in 2, in which a columnar arrangement of alternate dimetallic calixarene complexes and potassium/crown ether species is formed. |
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