Improved guanidinium ion-selectivity by novel calix[4]arene and calix[6]arene receptor molecules on CHEMFETs

Kremer, Felix J.B. and Chiosis, Gabriela and Engbersen, Johan F.J. and Reinhoudt, David N. (1994) Improved guanidinium ion-selectivity by novel calix[4]arene and calix[6]arene receptor molecules on CHEMFETs. Journal of the Chemical Society. Perkin transactions II, 1994 (4). pp. 677-681. ISSN 0300-9580

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Abstract:	Poly(vinyl chloride) membrane CHEMFETs incorporating a novel calix[4]arene derivative (1), novel calix[6]arene derivatives (3, 4, 5, 6 and 7), phosphate derivatives of p-tert-butylcalix[4]arene (2) or p-tert-butylcalix[6]arene (8) with variable amounts of hydrophobic anions [potassium tetrakis(4-chlorophenyl)borate (KTCTPB)] have been tested for their response to guanidinium ions in the presence of the interfering ions Na+, K+, NH4+ and Ca2+.The best guanidinium selectivity has been obtained for the CHEMFET based on the 1,3,5-triamide derivative of p-tert-butylcalix[6]arene (4), with dibutyl phthalate as solvent mediator, and 50 mol% KTCTPB with respect to the ionophore. The selectivity coefficients (log KpotGu,j) are the highest reported for guanidinium ions in a potentiometric sensor. The CHEMFETs show an almost ideal Nernstian response in the linear range (slope 58–60 mV decade–1).
Item Type:	Article
Copyright:	© 1994 Royal Society of Chemistry
Faculty:	Science and Technology (TNW)
Research Group:	Biomedical Chemistry (BMC)
Link to this item:	http://purl.utwente.nl/publications/12319
Official URL:	http://dx.doi.org/10.1039/P29940000677
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