Supramolecular self-assemblies of stereoisomers of p-tert-butyl thiacalix[4]arenes functionalized with hydrazide groups at the lower rim with some metal cations |
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Authors: | Ivan I Stoikov Elena A Yushkova Igor S Antipin |
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Institution: | a Department of Chemistry, Kazan State University, A.M. Butlerov Chemical Institute, 420008, Kazan, Kremlevskaya 18, Russian Federation b University of Utah, Salt Lake City, UT 84112, United States of America |
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Abstract: | Novel p-tert-butyl thiacalix4]arenes functionalized with hydrazide groups at the lower rim in cone, partial cone and 1,3-alternate conformations were synthesized and their receptor properties toward metal ions of p- (Al3+, Pb2+) and d- (Fe3+, Co3+, Ni2+, Cu2+, Ag+, Cd2+) elements were investigated by picrate extraction and dynamic light scattering (DLS). It was shown that the p-tert-butyl thiacalix4]arenes functionalized with hydrazide groups are effective extractants of soft metal cations. The complex stoichiometry depended on the receptor configuration. All the p-tert-butyl thiacalix4]arene derivatives with hydrazide fragments were able to form nanoscale aggregates but did not show self-association abilities. |
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Keywords: | Self-assembly p-tert-Butyl thiacalix[4]arenes Molecular recognition Picrate extraction Dynamic light scattering (DLS) |
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