Sodium ion-selective electrodes based on dibenzo-16-crown-5 compounds with pendent amide groups

Journal Article · Sun May 15 04:00:00 EDT 1994 · Analytical Chemistry (Washington); (United States)

DOI:https://doi.org/10.1021/ac00082a023· OSTI ID:7019892

Ohki, Akira; Maeda, Shigeru ^[1]; Lu, J P; Bartsch, R A ^[2]

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1. Kagoshima Univ. (Japan)
2. Texas Tech Univ., Lubbock, TX (United States)

Potentiometric selectivities for alkali-metal cations of dibenzo-16-crown-5 compounds with amide-containing side arms attached to the central carbon atom of the three-carbon bridge have been determined in solvent polymeric membrane electrodes. The lariat ethers include N-alkyl- and N,N-dialkyl-sym-(R)-dibenzo-16-crown-5-oxyacetamides with R = hydrogen or an alkyl group. The presence of an alkyl group on the ring carbon which bears the amide-containing side arm markedly increases the Na[sup +]/K[sup +] selectivity of poly(vinyl chloride) matrix membrane electrodes with o-nitrophenyl octyl ether as the membrane solvent. Lariat ethers with a N,N-dipentyloxyacetamide group as the side arm and a geminal alkyl group of two or more carbon atoms exhibit high Na[sup +]K[sup +] selectivities (log K[sub Na,K][sup Pot] = [minus]2.1) with good selectivities for Na[sup +] over the other alkali-metal cations, H[sup +], NH[sub 4][sup +], and alkaline-earth-metal cations. 25 refs., 6 figs., 1 tab.

• DOE Contract Number: FG05-88ER13832
• OSTI ID: 7019892
• Journal Information: Analytical Chemistry (Washington); (United States), Journal Name: Analytical Chemistry (Washington); (United States) Vol. 66:10; ISSN 0003-2700; ISSN ANCHAM
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
400400 -- Electrochemistry
AMIDES
AROMATICS
CHALCOGENIDES
CHARGED PARTICLES
CHLORINATED ALIPHATIC HYDROCARBONS
CROWN ETHERS
DATA
ELECTRODES
ETHERS
EVALUATION
EXPERIMENTAL DATA
HALOGENATED ALIPHATIC HYDROCARBONS
INFORMATION
ION-SELECTIVE ELECTRODES
IONS
MEMBRANES
MINERALS
NUMERICAL DATA
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PH VALUE
POLYMERS
POLYVINYLS
POTENTIOMETRY
PVC
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SODIUM IONS
TITRATION
VOLTAMETRY