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The synthesis and characterization of azocalix[4]arene based chemosensors and investigation of their properties.
- Source :
-
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy [Spectrochim Acta A Mol Biomol Spectrosc] 2015 May 05; Vol. 142, pp. 178-87. Date of Electronic Publication: 2015 Feb 07. - Publication Year :
- 2015
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Abstract
- In the present study, azocalix[4]arenes were prepared by linking 4-methoxy, 4-methyl, 4-ethyl, 4-chloro, 4-bromo and 4-nitroaniline to calix[4]arene through a diazo-coupling reaction. A new family of azocalix[4]arene tetraester derivatives, (4a-f), have been prepared with the incorporation of ethyl ester units to azocalix[4]arene. Characterization of the synthesized azocalix[4]arenes was carried using elemental analyses, UV-vis, FT-IR and (1)H NMR spectroscopic techniques. The effect of varying pH levels and solvent types on the absorption ability of azocalix[n]arenes substituted with electron-donating and electron-withdrawing groups was examined. Thermal decomposition of azocalix[4]arene derivatives (4a-f) was investigated by means of thermogravimetry (TG), differential thermogravimetry (DTG) and differential thermal analysis (DTA) analyses. In conclusion of the examination of the extraction we found a selectivity characteristic of these compounds toward Ag(+), Hg(+) and Hg(2+) cations.<br /> (Copyright © 2015 Elsevier B.V. All rights reserved.)
- Subjects :
- Azo Compounds chemical synthesis
Azo Compounds chemistry
Calixarenes chemical synthesis
Cations analysis
Magnetic Resonance Spectroscopy
Models, Molecular
Phenols chemical synthesis
Solvents
Spectroscopy, Fourier Transform Infrared
Thermogravimetry
Calixarenes chemistry
Mercury analysis
Phenols chemistry
Silver analysis
Subjects
Details
- Language :
- English
- ISSN :
- 1873-3557
- Volume :
- 142
- Database :
- MEDLINE
- Journal :
- Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy
- Publication Type :
- Academic Journal
- Accession number :
- 25703362
- Full Text :
- https://doi.org/10.1016/j.saa.2015.01.087