title: A Colorimetric and Fluorescent Chemosensor for the Selective Detection of Cu2+and Zn2+Ions.
abstract: A new bi-functional chemosensor 1 based on 3,5-dichlorosalicylaldehyde and 2-(methylthio)aniline has been synthesized. It can detect Cu2+with a color change from pale yellow to dark yellow in aqueous solution. The selective mechanism of 1 for Cu2+was proposed to be the enhancement of the intramolecular charge transfer (ICT) band, which was explained by theoretical calculations. The sensor 1 could be used to detect and quantify Cu2+in water samples. In addition, the sensor 1 displayed "turn-on" fluorescence response only to Zn2+, based on an effect of chelation-enhanced fluorescence (CHEF). Therefore, 1 can serve as a 'single sensor for two different targets' with dual modes.
authors: Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials, Seoul National University of Science and Technology, Seoul, 139-743, South Korea.
authors: Min Seon
authors: MS
authors: Kim
authors: Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials, Seoul National University of Science and Technology, Seoul, 139-743, South Korea.
authors: Tae Geun
authors: TG
authors: Jo
authors: Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials, Seoul National University of Science and Technology, Seoul, 139-743, South Korea.
authors: Hye Mi
authors: HM
authors: Ahn
authors: Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials, Seoul National University of Science and Technology, Seoul, 139-743, South Korea. chealkim@seoultech.ac.kr.
authors: Cheal
authors: C
authors: Kim
keywords: Chemosensor; Colorimetric; Copper ion; Fluorescent; Zinc ion