Selective sodium ion transfer across a water/1,2-dichloroethane micro-interface by a calix[4]arene derivative
Küçük Resim Yok
Tarih
2011
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
ELSEVIER SCIENCE SA
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The transfer of alkali and alkaline-earth metal ions facilitated by a calix[4]arene derivative, 25,27-di [(2-ethoxy)benzaldehyde]-26,28-dihydroxy-5,11,17,23-tetra(tert-butyl) calix[4]arene (DBC4), across a water/1,2-dichloroethane (1,2-DCE) micro-interface supported at the tip of a micropipette was investigated. The well-defined voltammetric behavior was obtained only for Na+ ion among the used metal ions by using the electrochemical methods. The measurements were performed when the bulk concentration of Na+ ion in the aqueous phase is much higher than that of DBC4 in the organic phase, and vice versa. The diffusion coefficient of DBC4 in the DCE phase was calculated to be equal to (4.2 +/- 0.2) x 10(-6) cm(2) s(-1). The logarithm of the association constant of DBC4-Na+ complex having 1:1 stoichiometry in 1,2-DCE was determined as 3.99. The differential pulse voltammetry was used for amperometric detection of Na+ ion in chloride medium. The results show that DBC4 can be used for many analytical applications such as ion recognition and fabrication of electrochemical sensor for Na+ ion because of its good selectivity. (C) 2011 Elsevier B.V. All rights reserved.
Açıklama
Anahtar Kelimeler
Calix[4]arene, Ion recognition, Liquid/liquid interface, Charge transfer, Amperometric ion sensor
Kaynak
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
WoS Q Değeri
Q2
Scopus Q Değeri
Q1
Cilt
654
Sayı
01.02.2020
