Selective Cation Recognition by p-Tetranitrocalix[4]arene

  • Imam Bakhsh Solangi National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro-76080 / Pakistan
  • Ashfaque Ali Bhatti National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro-76080 / Pakistan
  • Mansoor Amed Qazi National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro-76080 / Pakistan
  • Shahabuddin Memon National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro-76080 / Pakistan
  • M. I. Bhanger H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan

Abstract

The present study explores the copper selective complexation character of 5,11,17,23-tetranitro25,26,27,28-tetrahydroxycalix[4]arene (p-TNC4) among a series of different alkali, alkaline earth and transition metal ions, i.e. Li+, Na+, K+,Cs+ Mg2+, Ba2+, Hg2+, Cd2+, Pb2+, Co2+ Ni2+ and Zn2+ using absorption spectroscopic technique. p-TNC4 shows pronounced discriminative specificity towards Cu2+ even the interference study of other co-existing ions also proved this selectivity. Furthermore, the solvatochromic effect, effect of acid (acetic acid), alkali (piperidine) on spectra, response time measurement and the stability of p-TNC4-Cu2+ complex in MeCN has also been investigated. The stoichiometric analysis (i.e. Jobs plot) reveals that p-TNC4 forms 1:1 host-guest complex with Cu2+. 

Published
Dec 3, 2012
How to Cite
SOLANGI, Imam Bakhsh et al. Selective Cation Recognition by p-Tetranitrocalix[4]arene. Pakistan Journal of Analytical & Environmental Chemistry, [S.l.], v. 13, n. 2, p. 8, dec. 2012. ISSN 2221-5255. Available at: <http://pjaec.pk/index.php/pjaec/article/view/212>. Date accessed: 22 sep. 2017.