A phthalimide-based ESIPT fluorescent probe for sensitive detection of Cu2+ in complete aqueous solution

A novel fluorescence-enhanced probe 2-butyl-1,3-dioxoisoindolin-4-yl picolinate (BDIP) has been developed for the detection of Cu 2+ based on the excited-state intramolecular proton transfer (ESIPT) process. BDIP utilized a phthalimide derivative as the fluorophore and selected picolinate ester as t...

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Bibliographic Details
Published in:Analytical sciences 2022-04, Vol.38 (4), p.689-694
Main Authors: Sheng, Xiao, Kong, Lingdong, Wang, Jun, Ding, Lin, Liu, Zhaoming, Wang, Shouxin
Format: Article
Language:English
Subjects:
Analytical Chemistry
Chemistry
Chemistry and Materials Science
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Summary:A novel fluorescence-enhanced probe 2-butyl-1,3-dioxoisoindolin-4-yl picolinate (BDIP) has been developed for the detection of Cu 2+ based on the excited-state intramolecular proton transfer (ESIPT) process. BDIP utilized a phthalimide derivative as the fluorophore and selected picolinate ester as the recognition site for Cu 2+ . The probe displayed high selectivity, strong anti-interference ability, and a significant fluorescence enhancement effect for Cu 2+ in phosphate buffer saline (PBS, 10 mM, pH 7.4) with the detection limit of 31 nM. BDIP also possesses the advantages of simple synthesis steps, large Stokes shift, and good water solubility. Moreover, BDIP was used for Cu 2+ detection in real water samples, with the result being satisfactory. Graphical abstract
ISSN:0910-6340
1348-2246
DOI:10.1007/s44211-022-00084-9