SUBSTITUTED METALLOPORPHYRIN DERIVATIVES AS ANION CARRIER FOR PVC MEMBRANE ELECTRODES

The lipophilic metalloporphyrin derivatives containing electron donati ng or withdrawing groups are used as anion carriers with selectivity c haracteristics deviated from classical Hofmeister series. The electron effect of the carrier on the selectivity characteristics has been int erpreted in terms of the selective coordination action along the axial position of metalloporphyrins. An metalloporphyrin derivative with el ectron-donating groups is preferred for the preparation of this type o f anion-sensitive membrane electrodes.