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제116회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Fluorescent differentiation of Cu+ and Cu2+ in acetonitrile solvent via non-innocent mechanism

등록일
2015년 9월 8일 14시 52분 33초
접수번호
1385
발표코드
INOR.P-142 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 15일 (목요일) 11:00~12:30
발표형식
포스터
발표분야
무기화학
저자 및
공동저자
하용황, D.G.Churchill1,*
중원대학교 의약바이오학과, Korea
1한국과학기술원(KAIST) 화학과, Korea
A novel Schiff base probe (N,N′?bis(N?dimethylcarbamoyl?salicyl?2?imine)carbohydrazone) was synthesized and investigated for chemosensing purposes. Strongly selective ‘Turn?ON’ fluorescence signals were found for Cu2+ at 345 nm (85?fold) and for Al3+ at 445 nm (771?fold). Biothiols (L?cysteine, homocysteine, glutathione, N?acetyl cysteine) showed partial reversibility for Cu2+ fluorescence. Cu+, in the presence of Al3+, presented strong fluorescence at 360 nm (32?fold), likely occurring from H+ generated by Al3+ hydrolysis. H+ generated by Al3+ highly enables Cu+ fluorescence signaling based on proposed redox non?innocence. Reliability of Cu+ probing in this system was reasonable by verification via EPR analysis and lifetime measurements, which were collected under inert and ambient conditions. This probe is novel for Cu+ chemosensing in terms of having no soft donor atoms typical for such probes and serves as the first discriminator of mono? and divalent copper by a fluorescence ‘turn?ON’ signal via non-innocent mechanism.

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