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

Journal Article · Sat Jul 15 04:00:00 EDT 1995 · Analytical Chemistry (Washington)

DOI:https://doi.org/10.1021/ac00110a013· OSTI ID:81690

Ohki, Akira; Lu, J P; Hallman, J L; Huang, X; Bartsch, R A ^[1]

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

Selectivities of 21 dibenzo-16-crown-5 compounds with pendent ester groups for alkali metal, alkaline earth metal, and ammonium ions have been determined in solvent polymeric membrane electrodes. The ionophores include alkyl sym-R-dibenzo-16-crown-5-oxyacetates with R = hydrogen, linear alkyl, branched alkyl, fluoroalkyl, alkenyl, alkynyl, and phenyl groups. For lariat ethers with a hydrogen, linear alkyl group, or branched alkyl group attached to the ring carbon that bears the ester-containing side arm, the Na{sup +}/K{sup -} selectivity increases as the bulkiness of the geminal substituent is enhanced; whereas the Na{sup +}/Li{sup +} selectivity exhibits a weaker inverse relationship to the size of R. On the other hand, the Na{sup +}/K{sup +} and Na{sup +}/Li{sup +} selectivities are insensitive to variations in the size and shape of the ester alkyl groups. For eight of the lariat ether ester ionophores, very high Na{sup +}/Li{sup +} selectivities of 10{sup 3.8}-10{sup 3.9} are observed. 22 refs., 3 figs., 2 tabs.

• Sponsoring Organization: USDOE
• DOE Contract Number: FG03-94ER14416
• OSTI ID: 81690
• Journal Information: Analytical Chemistry (Washington), Journal Name: Analytical Chemistry (Washington) Journal Issue: 14 Vol. 67; ISSN ANCHAM; ISSN 0003-2700
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
40 CHEMISTRY
ACETATES
ELECTROCHEMISTRY
ELECTRODES
ESTERS
ETHERS
ION SELECTIVE ELECTRODE ANALYSIS
ION-SELECTIVE ELECTRODES
LITHIUM IONS
MEMBRANES
ORGANIC COMPOUNDS
POLYMERS
POTASSIUM IONS
SODIUM IONS