Triiodide PVC Membrane Electrode Based on a Charge‐Transfer Complex of Iodine with Ditertbutyl‐Dicyclohexyl‐18‐Crown‐6

Abstract

A new triiodide ion-selective electrode based on a charge-transfer complex of iodine with ditertbutyldicyclohexyl-18-crown-6 (t-Bu) 2 DC18C6 as membrane carrier was prepared. The electrode has a linear dynamic range from 6.3´10-3 -5´10 -6 with a Nernstian response of 58.6 ± 1 mV decade -1 and a detection limit of 1.3´10 -6 M. The response time of the sensor was 25 s. The membrane could be used for two months without any divergence in potentials. The electrode exhibits an anti-Hofmeistetr selectivity sequence with a preference for triiodide at pH 2.0-10.0. The response mechanism of the electrode was investigated by Uv-Vis spectroscopic technique. The electrode can be used for the determination of ascorbic acid in orange juice.

Charge-transfer chemistry of azithromycin, the antibiotic used worldwide to treat the coronavirus disease (COVID-19). Part I: Complexation with iodine in different solvents

“…Extensive research efforts have focused on the complexation of iodine with different types of electron n - and π - donors to form both weak and strong CT complexes. It forms a large number of complexes with a wide variety of heterocyclic, aliphatic, and aromatic molecules [ [145] , [146] , [147] , [148] , [149] , [150] , [151] , [152] , [153] , [154] , [155] , [156] , [157] , [158] , [159] , [160] , [161] , [162] , [163] , [164] , [165] , [166] , [167] ]. The purpose of this study was to characterize the CT interaction of AZM with iodine in four different solvents: CH 2 Cl 2 , CHCl 3 , CCl 4 , and C 6 H 5 Cl.…”