Calix[4]arene-crown-6 derivatives (1-3) in the 1,3-alternate conformation, incorporated in poly(vinylchloride) membranes of CHEMFETs, exhibit good Cs+-selectivity and Nernstian behaviour. The Cs+-selectivity over Na+, i.e., log K-Cs,Na(pot) = -3.3, is slightly better than observed for bis(18-crown-6) derivatives (log K-Cs,Na(pot) = -3.0). The CHEMFETs respond sub-Nernstian in the presence of NH4+: and K+. Model calculations show that this can be explained by the small difference between the stability constants of the Cs+- and K+-complexes and by the high partition coefficient of NH4+ in favour of the membrane phase, respectively.

Cesium-Selective Chemical Modified Field Effect Transistors with Calix[4]arene-crown-6 Derivatives / R. J. W., Lugtenberg; Z., Brzozka; Casnati, Alessandro; Ungaro, Rocco; J. F. J., Engbersen; D. N., Reinhoudt. - In: ANALYTICA CHIMICA ACTA. - ISSN 0003-2670. - 310:(1995), pp. 263-267. [10.1016/0003-2670(95)00139-Q]

Cesium-Selective Chemical Modified Field Effect Transistors with Calix[4]arene-crown-6 Derivatives

CASNATI, Alessandro;UNGARO, Rocco;
1995-01-01

Abstract

Calix[4]arene-crown-6 derivatives (1-3) in the 1,3-alternate conformation, incorporated in poly(vinylchloride) membranes of CHEMFETs, exhibit good Cs+-selectivity and Nernstian behaviour. The Cs+-selectivity over Na+, i.e., log K-Cs,Na(pot) = -3.3, is slightly better than observed for bis(18-crown-6) derivatives (log K-Cs,Na(pot) = -3.0). The CHEMFETs respond sub-Nernstian in the presence of NH4+: and K+. Model calculations show that this can be explained by the small difference between the stability constants of the Cs+- and K+-complexes and by the high partition coefficient of NH4+ in favour of the membrane phase, respectively.
1995
Cesium-Selective Chemical Modified Field Effect Transistors with Calix[4]arene-crown-6 Derivatives / R. J. W., Lugtenberg; Z., Brzozka; Casnati, Alessandro; Ungaro, Rocco; J. F. J., Engbersen; D. N., Reinhoudt. - In: ANALYTICA CHIMICA ACTA. - ISSN 0003-2670. - 310:(1995), pp. 263-267. [10.1016/0003-2670(95)00139-Q]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2313419
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