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Dipodal Tetraamide Derivatives of 1,10-Diaza-18-Crown-6 and Alkylmalonic Acids-Synthesis and Use as Ionophores in Ion Selective Membrane Electrodes.

ABSTRACT: Novel dipodal derivatives of an 18-membered diaza-crown ether with two diamide chains featuring methylmalonic or butylmalonic acid residues were obtained and tested as ionophores in ion-selective plasticized membrane electrodes. The objective of the study was to identify measurement conditions which ensure the most favorable performance for magnesium ion-selective electrodes. The relationship between the molar lipophilic anion salt-to-ionophore ratio and selectivity of electrodes was examined. The best result was obtained for the conventional electrode containing Mg2 ionophore. Calculated selectivity coefficients were as follows: logK_Mg/Ca = -2.77, logK_Mg/Na = -3.46 and logK_Mg.K = -2.24 (SSM, 1M).

SUBMITTER: Pomecko R

PROVIDER: S-EPMC8348374 | biostudies-literature |

REPOSITORIES: biostudies-literature

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