title: Lipophilic lanthanide tris(beta-diketonate) complexes as an ionophore for Cl- anion-selective electrodes.
abstract: A series of novel anion-selective electrodes were developed by incorporating lipophilic lanthanide tris(beta-diketonates) into plasticized poly(vinyl chloride) membranes. The new electrodes exhibited high selectivity toward Cl(-) anion in the concentration range of Cl(-) anion between 1.0 x 10(-5) and 1.0 x 10(-1) mol/L with near-Nernstian slopes and practically low detection limits. They offered non-Hofmeister anion selectivity, and interestingly discriminated Cl(-) anion from NO(3)(-), ClO(4)(-), and other anions. Since the employed lanthanide tris(beta-diketonates) were confirmed to form 1:1 highly coordinated complexes with Cl(-) anion, the observed high selectivity for Cl(-) anion was attributed to the characteristics of lanthanide coordination chemistry. All the prepared sensors worked well at neutral pH with quite short response time, <30 s, and could be used for longer than four months without any significant divergence in performance.
authors.affiliation: Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, India. rakesh_chem@yahoo.com
authors.forename: Rakesh Kumar
authors.initials: RK
authors.lastname: Mahajan
authors.forename: Inderpreet
authors.initials: I
authors.lastname: Kaur
authors.forename: Ravneet
authors.initials: R
authors.lastname: Kaur
authors.forename: Aki
authors.initials: A
authors.lastname: Onimaru
authors.forename: Satoshi
authors.initials: S
authors.lastname: Shinoda
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Tsukube