Colorimetric fluorescent cyanide chemodosimeter based on triphenylimidazole derivative.
In this paper, we demonstrated a highly selective colorimetric chemodosimeter for cyanide anion detection. This chemodosimeter having a triphenylimidazole group as a fluorescent signal unit and a dicyano-vinyl group as a reaction unit was synthesized by the Knoevenagel condensation of 4-(4,5-diphenyl-1H-imidazol-2-yl)benzaldehyde with malononitrile in a reasonable yield. The probe exhibited an intramolecular charge transfer (ICT) absorption band at 420 nm and emission band at 620 nm, respectively. Upon the addition of cyanide anion, the probe displayed a blue-shifted spectrum and loss in color due to the disruption of conjugation. With the aid of the fluorescence spectrometer, the chemodosimeter exhibited a detection limit of 0.11 μM (S/N=3). Interferences from other common anions associated with cyanide anion analysis were effectively inhibited.
College of Chemistry, Xiangtan University, Xiangtan 411105, Hunan Province, PR China.
Wei
W
Zheng
College of Chemistry, Xiangtan University, Xiangtan 411105, Hunan Province, PR China.
Xiangzhu
X
He
College of Chemistry, Xiangtan University, Xiangtan 411105, Hunan Province, PR China. Electronic address: chhb606@163.com.
Hongbiao
H
Chen
College of Chemistry, Xiangtan University, Xiangtan 411105, Hunan Province, PR China.
Yong
Y
Gao
College of Chemistry, Xiangtan University, Xiangtan 411105, Hunan Province, PR China; Key Laboratory of Polymeric Materials & Application Technology of Hunan Province, Key Laboratory of Advanced Functional Polymeric Materials of College of Hunan Province, and Key Lab of Environment-Friendly Chemistry and Application in Ministry of Education, Xiangtan University, Xiangtan 411105, Hunan Province, PR China. Electronic address: lihuaming@xtu.edu.cn.
Huaming
H
Li
D065966:Absorption, Physicochemical; D003124:Colorimetry / Q000295:instrumentation*; D003486:Cyanides / Q000032:analysis*; D004121:Dimethyl Sulfoxide / Q000737:chemistry; D007093:Imidazoles / Q000737:chemistry*; D066244:Proton Magnetic Resonance Spectroscopy; D013050:Spectrometry, Fluorescence; D013997:Time Factors
D003486:Cyanides; D007093:Imidazoles; C107378:lophine; D004121:Dimethyl Sulfoxide
Chemodosimeter; Colorimetry; Cyanide anion; Intramolecular charge transfer