ISSN:
1573-1111
Keywords:
Cation transport
;
3,6-dioxa-4,5-disubstitutedoctanedicarboxamides
;
DB18C6
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The previously synthesized3,6-dioxa-4,5-disubstitutedoctanedicarboxamides including NPr bind cationsin methanol in the order: Ca2+ 〉 Sr2+ 〉Ba2+ 〉 Mg2+ 〉 Na+,K+. These compounds also extract Group II cations better thanGroup I cations from water to dichloromethane. In contrast, thesediacetamides were found by W. Simon et al., to sense Na+ 〉Ca2+ when they were incorporated into ion-selective electrodesusing a low dielectric constant solvent. It was of interest to determine theorder of Group I and Group II cation transport rates of these compoundsusing a three-phase system with a liquid organic phase of low dielectricconstant. We now report that NPr transports thiocyanates in such a systemusing dichloromethane in the order K+ (7.2) 〉Ca2+ (6.6) 〉 Ba2+ (5.8) 〉 Na+(1). The transport rate for KSCN with DB18C6 is 20.5 times faster than withNPr.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1007964826803
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