A Highly Selective and Sensitive Fluorescent Probe Recognition for Co2+ in Aqueous Media Based on 8‐Hydroxyquinolin‐2‐carbaldehyde‐2‐pyridylformylhydrazone Derivative |
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| Authors: | Keli Zhong Jie Zhao Xue Zhou Shuhua Hou Yanjiang Bian Jianrong Li Lijun Tang |
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| Affiliation: | 1. College of Chemistry and Chemical Engineering, College of Food Science and Technology, Bohai University, Jinzhou, Liaoning 121013, China;2. National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products, Jinzhou, Liaoning 121013, China |
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| Abstract: | A new (8‐hydroxyquinolin‐2‐yl)methylene picolinohydrazide derivative ( L ) has been successfully synthesized and characterized. The probe L displays high selectivity to Co2+ in CH3CN/HEPES (1:1, Ｖ/Ｖ, 10 mmol·L?1, pH=7.4) with a fluorescence "ON‐OFF" response. The Co2+ ion recognition event possesses some distinct features including rapid response, high selectivity and sensitivity, good anti‐interference ability and being applicable within a wide pH range. Based on job's plot and ESI‐MS studies, the 1:1 binding mode was proposed. The binding constant of L and Co2+ is 1.63×108 L·mol?1 and the detection limit is 1.15 µmol·L?1. Natural water samples experiments revealed that probe L can be potentially applied to the detection of Co2+ in real environment. |
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| Keywords: | fluorescent probe Co2+ recognition aqueous media environmental |
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