期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 515, 期 -, 页码 41-49出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2016.12.007
关键词
Thiacalix[4]arenes; Ammonium compounds; Macrocyclic; Amphiphiles; Fluorescent sensing; sodium dodecyl sulphate
资金
- Russian Science Foundation [14-13-01151]
- Russian Science Foundation [17-13-00040] Funding Source: Russian Science Foundation
New ammonium-containing derivatives of p-tert-butylthiacalix[4]arene in 1,3-alternate stereoisomeric form were synthesized via copper-catalyzed azide-alkyne cycloaddition (CuAAC) reaction of corresponding azides with N-propargyl-N,N,N-triethylammonium bromide. Critical aggregation concentration (CAC) of new amphiphilic thiacalixarenes 1-3 (with butyl, octyl and tetradecyl substituents) determined by pyrene micellization method are 91, 59 and 33 mu M, respectively. According to DLS data the diameter of these aggregates is around 130 nm. Anionic dye Eosin Y (EY) forms the associates with positive charged thiacalixarenes 1-3, shifts CAC to the low concentration region (2 mu M) and decreases nanoaggregates size up to 90 nm. Thiacalixarene/EY associates were investigated as fluorescent probe for the determination of different surface active substances (SAS) in the solution. It was found that only sodium dodecyl sulfate (SDS) and sodium laureth sulfate (SLES) causes EY release, while other anionic, cationic and zwitterionic SAS form only mixed aggregates. Fluorescent response of thiacalixarene/EY associates is considerable from 3.5 mu M concentration of SDS. (C) 2016 Elsevier B.V. All rights reserved.
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