Polymeric Membrane Sodium-Selective Electrodes Based on Calix[4]arene Ionophores

Potentiometric ion-selective sensors based on UV-ozone irradiated laser-induced graphene electrode

“…In order to construct an ISE for sodium, sodium selective neutral ionophore (Na-X) and ion exchanger potassium tetrakis ((4chlorophenyl) borate were incorporated in the polymeric matrix [49,50]. Sodium ionophore X has a high sensitivity to Na + ion and superior selectivity against other similar ions like H + , K + and NH 4 + [50,58,59]. We examined selectivity measurements using O-LIG based Na + ISEs.…”

Supramolecular Based Membrane Sensors

“…In the same year Y. Shibutani et al, studied six kinds of tetra alkylester type calix[4]arene derivatives, a diethyl-didecyl mixed ester, and three kinds of lower rim bridged which were characterized by electrochemical measurement to elucidate the effect of the length of the alkyl group of alkoxycarbonyl substituents on Na + selectivity [17]. They found that to obtain excellent Na + selective ionophores, introduction of short chain alkyl groups rather than long chain ones, such as a decyl group, and maintenance of sufficient solubility of the calix[4]arene derivatives in the membrane solvent are required concurrently.…”