title: Several hemicyanine dyes as fluorescence chemosensors for cyanide anions.
abstract: Four hemicyanine dyes as chemosensors for cyanide anions were synthesized easily. Their photophysical properties and recognition properties for cyanide anions were investigated. The results indicate that all the dyes can recognize cyanide anions with obvious color, absorption and fluorescence change. The recognition mechanism analysis basing on in situ (1)H NMR and Job plot data indicates that to the compounds with hydroxyl group, the recognition mechanism is intramolecular hydrogen bonding interaction. However, to the compounds without hydroxyl group, cyanide anion is bonded to carbon-carbon double bond in conjugated bridge and induces N(+)CH3 to neutral NCH3. Fluorescence of the compounds is almost quenched upon the addition of cyanide anions.
authors.affiliation: School of Material Science and Engineering, Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, Shandong, China.
authors.forename: Muhan
authors.initials: M
authors.lastname: Liang
authors.affiliation: School of Material Science and Engineering, Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, Shandong, China.
authors.forename: Kangnan
authors.initials: K
authors.lastname: Wang
authors.affiliation: School of Material Science and Engineering, Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, Shandong, China.
authors.forename: Ruifang
authors.initials: R
authors.lastname: Guan
authors.affiliation: State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, Shandong, China. Electronic address: zqliu@sdu.edu.cn.
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Liu
authors.affiliation: School of Material Science and Engineering, Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, Shandong, China. Electronic address: duxiacao@ujn.edu.cn.
authors.forename: Duxia
authors.initials: D
authors.lastname: Cao
authors.affiliation: School of Material Science and Engineering, Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, Shandong, China.
authors.forename: Qianqian
authors.initials: Q
authors.lastname: Wu
authors.affiliation: School of Material Science and Engineering, Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, Shandong, China.
authors.forename: Yanyan
authors.initials: Y
authors.lastname: Shan
authors.affiliation: School of Material Science and Engineering, Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, Shandong, China.
authors.forename: Yongxiao
authors.initials: Y
authors.lastname: Xu
keywords: Cyanide; Fluorescence chemosensor; Hemicyanine dye; Photophysical property