Дата публикации: 2008-01-01
Дата публикации в реестре: 2018-11-30T10:43:27Z
In this work, the synthesis of novel p-tert-butyl thiacalixarenes functionalized with the secondary amide groups at the lower rim in cone, partial cone, and 1,3-alternate conformations is described. The ability of novel thiacalixarene derivatives to form dimeric associates held together by hydrogen bonds of p-tert-butyl thiacalixarenes and to recognize metal ions of s (Li+, Na+, K+, Cs+, Mg2+, Ca2+, Ba2+), p (Al3+, Pb2+), and d (Fe3+, Co3+, Ni2+, Cu2+, Ag+, Cd2+, Hg2+) elements was investigated by the picrate extraction method and dynamic light scattering (DLS). As was established, the thiacalixarenes investigated are poor extractants for all the metal ions. Meanwhile they self-associate to form dimers of similar size (1.1-2.7 nm) and nanoscale particles consisting of p-tert-butyl thiacalixarenes and silver cations with hydrodynamic diameters of 70-170 nm. © 2008 Elsevier Ltd. All rights reserved.