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  • 08월 28일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

Selective Colorimetric Sensing of Geometrical Isomers of Dicarboxylates in Water Using Functionalized Gold nanoparticles

등록일
2008년 8월 12일 12시 13분 12초
접수번호
1357
발표코드
34P305포 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 <발표Ⅲ>
발표형식
포스터
발표분야
유기화학
저자 및
공동저자
amrita chatterjee, 오동주1, 안교한1
포항공과대학교 화학과, India
1포항공과대학교 화학과, Korea
Design and synthesis of functionalized gold nanoparticles (AuNPs) is of current interest due to its potential applications as a colorimetric sensing system for chemical and biological sciences. The visual sensing ability of AuNPs relies on the changes in color, arising from the surface plasmon resonance phenomenon, from rd to blue through analyte triggered aggregation. Recently, considerable efforts have been made in the development of selective sensing systems for carboxylates anions, which are present in a variety of biomolecules. For the last few years our research has been directed towards the utilization of a novel anion recognition motif, o-(trifluoroacetyl) carboxanilide (TFACA), which shows significant binding affinity towards carboxylates. We developed TFACA functionalized AuNP based colorimetric sensing system for dicarboxylates, which shows good sensitivity but required a post-treatment with poly vinyl alcohol (PVA) to improve its stability in water and it has to be optimized against several experimental variables such as the concentration of the ligand, polymer and analyte. We will present here a new AuNP based system with a water soluble TFACA analogue, which shows much improved stability in water and also extremely high sensitivity towards specific isomers of dicarboxylates, such as fumarate and benzene-1,4-dicarboxyletes in water, through a recognition-induced aggregation process

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