Analytical Science and Technology (분석과학)

The Korean Society of Analytical Sciences (한국분석과학회)
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Detection of ClO4- via A Hypersensitive Receptor : Unusual Electrostatic Equilibria between Host and Guest in Aqueous Media

고감도 수용체에 의한 ClO4- 검출 : 수용액에서 주-객 이온간의 평형

  • Lee, Young-A (Materials Chemistry Laboratory, Korea Institute of Science and Technology) ;
  • Hong, Jongki (Korea Basic Science Institute) ;
  • Jung, Ok-Sang (Materials Chemistry Laboratory, Korea Institute of Science and Technology)
  • 이영아 (한국과학기술연구원 재료화학연구실) ;
  • 홍종기 (한국기초과학지원연구원 유해물질분석연구팀) ;
  • 정옥상 (한국과학기술연구원 재료화학연구실)
  • Received : 2001.11.05
  • Published : 2002.02.25
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Abstract

A useful receptor for the sensing of ${CIO_4}^-$ species with remarkable selectivity has been developed. The hypersensitive interaction between a host and a guest has been investigated for the complex $[Pd(Me_4en)(Py_2S){\cdot}2ClO_4]_4$ ($Me_4en$ = N,N,N',N'-tetramethylethylenediamine; $Py_2S$ = 4,4'-dipyridyl sulfide). The pyridyl moiety of $Py_2S$ exhibits two sets of $^1H$ resonances that are delicately dependent upon temperature, concentration, and media. The nonrigidity has been explained in terms of an electrostatic equilibrium between the tetrameric host and the ${CIO_4}^-$ guest. The equilibrium is a useful method for the detection of ${CIO_4}^-$ anion with remarkable selectivity via "a restricted guest within a big host" in aqueous solution.

${CIO_4}^-$ 이온만을 선택적으로 감지하는 새로운 수용체가 개발되었다. $[Pd(Me_4en)(Py_2S){\cdot}2ClO_4]_4$ ($Me_4en$ = N,N,N'N'-tetraethylethylenediamine; $Py_2S$ = 4,4'-dipyridyl sulfide) 착화합물에서 주-객 화학종 간의 고감도 작용력을 연구하였다. $Py_2S$의 피리딜 기는 온도, 농도, 매개체 등에 아주 민감한 두 가지의 셋트의 $^1H$ NMR, 공명 시그날을 보여주었다. 이러한 NMR 거동을 수용액에서 고리 사합체의 양이온과 ${CIO_4}^-$ 음이온 간의 정기적 인력에 의한 평형 때문인 것으로 해석되었다.

Keywords

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