EFFECTS OF ALPHA-SUBSTITUENTS ON ION SELECTIVITY OF BIS(12-CROWN-4-METHYL) MALONATES AS NEUTRAL CARRIERS FOR SODIUM ION-SELECTIVE ELECTRODES

Authors
KIMURA K YOSHINAGA M FUNAKI K SHIBUTANI Y YAKABE K SHONO T KASAI M MIZUFUNE H TANAKA M
Citation
K. Kimura et al., EFFECTS OF ALPHA-SUBSTITUENTS ON ION SELECTIVITY OF BIS(12-CROWN-4-METHYL) MALONATES AS NEUTRAL CARRIERS FOR SODIUM ION-SELECTIVE ELECTRODES, Analytical sciences, 12(1), 1996, pp. 67-70
Citations number
8
Categorie Soggetti
Chemistry Analytical
Journal title
Analytical sciences → ACNP
ISSN journal
09106340
Volume
12
Issue
1
Year of publication
1996
Pages
67 - 70
Database
ISI
SICI code
0910-6340(1996)12:1<67:EOAOIS>2.0.ZU;2-F
Abstract
The effects of alpha-substituents on sodium-ion selectivities of bis(1 2-crown-4-methyl) malonates, which are highly selective for sodium ion s, were investigated by incorporating various substituents with high l ipophilicity, bulkiness, polarity and back strain. The incorporation o f geminal substituents such as long alkyl chains and benzyl groups int o the alpha-position of the malonate was found to generally enhance th e Na+ selectivity, especially against K+, of the bis(12-crown-4) deriv atives. The alpha,alpha'-dibenzylmalonate derivative gave the best Na selectivity of all the bis(crown ether)s designed here.