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

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.

Keywords

perchlorate sensing;palladium complex;electrostatic interaction

Acknowledgement

Supported by : Ministry of Science and Technology

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