119th General Meeting of the KCS

Type Poster Presentation
Area 무기화학
Room No. 포스터발표장
Time 4월 21일 (금요일) 13:00~14:30
Code INOR.P-57
Subject A novel colorimetric chemosensor for detection of Co2+ and S2- in an aqueous environment
Authors 장효정, 김 철1,*, 윤동주
서울과학기술대학교 정밀화학과, Korea
1서울과학기술대학교 정밀화학과 친환경소재제품센터, Korea
Abstract A novel multifunctional and highly selective chemosensor 1, N 2-(bis(pyridin-2-ylmethyl)amino)-N-(2-((2,4-dinitrophenyl)amino)phenyl)acetamide, for Co2+ and S2- was designed and synthesized. Sensor 1 showed a selective colorimetric sensing ability for cobalt ion by changing color from pale yellow to light green in a near perfect aqueous solution. The detection limit (0.99 M) of 1 for Co2+ was lower than the Environmental Protection Agency (EPA) guideline (1.7 μM) for drinking water. The sensor 1 could be used to quantify Co2+ in water samples. Moreover, sensor 1 detected S2- selectively, which induced an obvious color change from pale yellow to pink over most other competitive anions in aqueous solution. The sensing mechanism of Co2+ by 1 was proposed to be a ligand-to-metal charge-transfer (LMCT) with the experimental results and theoretical calculations, and that of S2- by 1 proposed to be a deprotonation process. Therefore, this sensor 1 could be used as a practical system for monitoring both Co2+ and S2- in an aqueous environment.
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