title: Dual-channel detection of Cu(2+) and F(-) with a simple Schiff-based colorimetric and fluorescent sensor.
abstract: A simple and easily synthesized colorimetric and fluorescent receptor 1, based on 4-diethylaminosalicylaldehyde moieties as a binding and signaling unit, has been synthesized and characterized. The receptor 1 has a selective colorimetric sensing ability for copper (II) ion by changing color from colorless to yellow in aqueous solution, and could be utilized to monitor Cu(II) over a wide pH range of 4-11. In addition, the detection limit (12μM) of 1 for Cu(2+) is much lower than that (30μM) recommended by WHO in drinking water, and its copper complex could be reversible simply through treatment with a proper reagent such as EDTA. Moreover, receptor 1 exhibited both a color change from colorless to yellow and fluorescence enhancement with a red shift upon addition to F(-) in DMSO. The recognition mechanism was attributed to the intermolecular proton transfer between the hydroxyl group of the receptor and the fluoride.
authors.affiliation: Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials, Seoul National University of Science and Technology, Seoul 139-743, Republic of Korea.
authors.forename: Yu Jeong
authors.initials: YJ
authors.lastname: Na
authors.affiliation: Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials, Seoul National University of Science and Technology, Seoul 139-743, Republic of Korea.
authors.forename: Ye Won
authors.initials: YW
authors.lastname: Choi
authors.affiliation: Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials, Seoul National University of Science and Technology, Seoul 139-743, Republic of Korea.
authors.forename: Jin Yeong
authors.initials: JY
authors.lastname: Yun
authors.affiliation: Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 151-742, Republic of Korea.
authors.forename: Kyung-Min
authors.initials: KM
authors.lastname: Park
authors.affiliation: Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 151-742, Republic of Korea. Electronic address: pschang@snu.ac.kr.
authors.forename: Pahn-Shick
authors.initials: PS
authors.lastname: Chang
authors.affiliation: Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials, Seoul National University of Science and Technology, Seoul 139-743, Republic of Korea. Electronic address: chealkim@seoultech.ac.kr.
authors.forename: Cheal
authors.initials: C
authors.lastname: Kim
keywords: Colorimetric; Copper; Fluorescent; Fluoride; Reversible