Journal of the Korean Chemical Society (대한화학회지)

Korean Chemical Society (대한화학회)
권호 표지

Benzothiazole Substituted Benzocrown Ether-Based Potassium Ion-Selective Membrane Electrodes

벤조티아졸기를 갖는 벤조크라운에테르를 전극물질로 사용한 $K^+$ 이온선택성 막전극

  • Hong, Uk Sun (Department of Chemistry and Research Institute of Basic Science, Kwangwoon University) ;
  • Kwon, Hye Kyong (Department of Chemistry and Research Institute of Basic Science, Kwangwoon University) ;
  • Cha, Geun Sig (Department of Chemistry and Research Institute of Basic Science, Kwangwoon University) ;
  • Nam, Hakhyun (Department of Chemistry and Research Institute of Basic Science, Kwangwoon University) ;
  • Chang, Seung Hyun (Department of Chemistry, Taegu University) ;
  • Chung, Kwang Bo (Department of Chemical Engineering, Hanseo University)
  • 홍욱선 (광운대학교 이과대학 화학과, 광운대학교 기초과학연구소) ;
  • 권혜경 (광운대학교 이과대학 화학과, 광운대학교 기초과학연구소) ;
  • 차근식 (광운대학교 이과대학 화학과, 광운대학교 기초과학연구소) ;
  • 남학현 (광운대학교 이과대학 화학과, 광운대학교 기초과학연구소) ;
  • 장승현 (대구대학교 자연과학대학 화학과) ;
  • 정광보 (한서대학교 공과대학 화학공학과)
  • Published : 19950900

Abstract

The ion-selective membrane fabricated with 33 wt% PVC, 66 wt% o-NPOE and 1 wt% 4'-benzothiazolylbenzo-15-crown-5 (TB15C5) as a neutral carrier exhibited an enhanced selectivity to potassium ion over sodium ion compared to those prepared with other 15-crown-5 or 18-crown-6 derivatives. The potentiometric properties (response slope, selectivity, detection limits and lifetime) of TB15C5-based ISE membranes along with those based on valinomycin, benzo-15-crown-5 (B15C5), 4'-aminobenzo-15-crouwn-5 (AB15C5), benzo-18-crown-6 (B18C6), dibenzo-18-crown-6 (DB18C6) and bis[(benzo-15-crown-5)-4'-ylmethyl]pimelate (PI-Ⅱ) ionophores were carefully examined under the same experimental conditions. The enhanced selectivity of TB15C5-based membrane to potassium is explained in terms of the effect of the benzothiazol functional group and the distribution coefficients of metal ions.

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