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학술발표회초록보기

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제114회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Solvent controlled novel Cu+ and Cu+/2+ fluorescent Turn-ON probing

등록일
2014년 9월 1일 12시 05분 53초
접수번호
1394
발표코드
INOR.P-257 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 15일 (수요일) 16:00~19:00
발표형식
포스터
발표분야
무기화학
저자 및
공동저자
하용황, D.G.Churchill*
한국과학기술원(KAIST) 화학과, Korea
A novel Schiff base probe, (carbamoyl salicylimine benzothiazole hydrazine) was prepared and measured for its probing ability. High sensitivity was shown for Cu+ and Cu2+. When solvent polarity was regulated by the combination of 100% H2O to 100% acetonitrile, selective sensing of Cu+ or total amount of Cu+ and Cu2+ was possible. In addition, a linear hypsochromic fluorescent shift of about 40 nm was shown. Binding stoichiometry of 1: 1 exists at low concentration. Time-dependent emission measurement showed exponential decay curve (τ1 = 2.99 x 103s, 10 equiv. of Cu+) and linear decay line (slope = -0.02159, 5 equiv of Cu+). Biothiols, L-cysteine, DL-homocysteine, Glutathione reduced, N-acetyl-L-cysteine showed almost complete reversibility of Cu+-induced emission in 50% acetonitrile in H2O, relative to partial reversibility of Cu2+ emission. Herein, by regulation of the ratio between acetonitrile and H2O, Cu+ and Cu+/2+can be probed selectively in this system.

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