| Full text | |
| Author(s): |
Total Authors: 2
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| Affiliation: | [1] Univ Fed Sao Paulo, Inst Ciencias Ambientais Quim & Farmaceut, Dept Quim, Lab Quim Calixarenos Espect Mol & Catalise, Rua Prof Arthur Riedel 275, BR-09972270 Diadema, SP - Brazil
Total Affiliations: 1
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| Document type: | Journal article |
| Source: | SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY; v. 189, p. 44-50, JAN 15 2018. |
| Web of Science Citations: | 7 |
| Abstract | |
A new quinoline-amide calix{[}4]arene 3-receptor for detection of hazardous anions and cations have been synthesized. The 3-receptor was examined for its sensing properties towards several different anions (Cr2O72-, SCN-, F-, Cl-, N-3(-)) and metal ions (Hg2+, Cd2+, Ag+) by UV-vis and fluorescence spectroscopies. It was detected that the 3-receptor has only sensing ability for Cr2O73- and Hg2+ ions, resulting in the association constants higher for Cr2O73- than to the Hg2+ ions. High selectivity towards Cr2O73- were also observed by fluorescence measurement among other ions (F-, SCN-, Hg2+, Cd2+, Ag+) with a low limit of detection (7.36 x 10(-6) mol dm(-3)). Proton NMR anion-binding investigations revealed a strong interaction of Cr2O73- anion with NH and CH groups of the receptor, showing that the combination with hydrogen-bonds donor groups strengthened the anion receptor association. Furthermore, remarkable association constants for dichromate anion obtained by all techniques strongly suggest the 3-receptor as a selective Cr(VI) sensor. (C) 2017 Elsevier B.V. All rights reserved. (AU) | |
| FAPESP's process: | 15/20485-4 - Calixarenes and iminic ligands developed for sensors, luminescent and bioinorganic compounds |
| Grantee: | Izilda Aparecida Bagatin |
| Support Opportunities: | Regular Research Grants |