季鏻盐定域体制备阴离子膜电极的研究

Anion-Sensitive Membrane Electrodes Based on Quaternary Phosphonium Sites

本文合成了数种季鏻盐,并用于制成阴离子膜电极;比较了不同链长的季鏻盐和电活性物含量对电极性能的影响;研究了电极的电位选择性系数与阴离子性质的关系。

The quaternary phosphonium compounds are promising site materials for the preparation of anion-sensitive electrodes.Many phosphonium counter-parts of quaternary ammonium salts are difficult to be synthesized and the simplified methods searching for synthesis of useful quaternary phosphonium site materials are of considerable interest.Several such phosphonium compounds have been synthesized and compared as site materials for anion-sensitive membranes.Hexadecyltriphenylphosphonium iodide(HTPP)was recommended as especially suitable substance for this purpose.Asimple method for synthesis of HTPP from triphenylphosphine and hexadecyl iodide was worked out.The electrodes prepared from HTPP are equal or superior in sensitivity to the early quaternary ammonium site versions.The membrane composition for various anions was optimized.The potentiometric selectivity coefficients of the prepared electrodes and their correlation with various ionic parameters have also been investigated.