A Highly Selective and Sensitive Fluorescent Probe Recognition for Co2+ in Aqueous Media Based on 8‐Hydroxyquinolin‐2‐carbaldehyde‐2‐pyridylformylhydrazone Derivative. Issue 12 (20th December 2016) - Zhong, Keli
Abstract: A new (8‐hydroxyquinolin‐2‐yl)methylene picolinohydrazide derivative (L ) has been successfully synthesized and characterized. The probeL displays high selectivity to Co 2+ in CH3 CN/HEPES (1:1, Ｖ / Ｖ, 10 mmol·L −1, pH=7.4) with a fluorescence "ON‐OFF" response. The Co 2+ 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 ofL and Co 2+ is 1.63×10 8 L·mol −1 and the detection limit is 1.15 µmol·L −1 . Natural water samples experiments revealed that probeL can be potentially applied to the detection of Co 2+ in real environment. Abstract : A new fluorescence probe (L ) based on 8‐hydroxyquinolin was prepared. ProbeL has good selectivity and sensitivity to Co 2+ in aqueous media. The probe has potential application in real environment.