A colorimetric and fluorescent sensor for sequential detection of copper ion and cyanide |
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Authors: | Gyeong Jin Park In Hong Hwang Eun Joo Song Hyun Kim Cheal Kim |
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Institution: | 1. Department of Fine Chemistry, Seoul National University of Science and Technology, 172 Kongnung 2-Dong, Nowon Gu, Seoul 139-743, Republic of Korea;2. Department of Interdisciplinary Bio IT Materials, Seoul National University of Science and Technology, 172 Kongnung 2-Dong, Nowon Gu, Seoul 139-743, Republic of Korea |
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Abstract: | A simple cation sensor 1 ((E)-9-((2-hydroxynaphthalen-1-ylimino)methyl)-1,2,3,5,6,7-hexahydropyrido3,2,1-ij]quinolin-8-ol) bearing both a julolidine moiety and a naphthol moiety was designed and synthesized as a colorimetric sensor for Cu2+. In methanol solution of 1, the presence of Cu2+ led to a distinct naked-eye color change from yellow to purple. The proposed sensing mechanism might be attributed to the decrease in internal charge transfer band. Moreover, the resulting 1–Cu2+ complex sensed cyanide in a fluorometric way via fluorescent changes. These results demonstrate a novel type of the sequential recognition of Cu2+ and CN− using two different sensing methods, color change, and fluorescence. |
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Keywords: | Colorimetric Fluorescent sensor Copper Cyanide Julolidine Naphthol |
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