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A highly selective 1,8-naphthalimide probe for recognition of casein based on aggregation induced emission enhancement characteristics

Paper ID Volume ID Publish Year Pages File Format Full-Text
27240 44011 2013 7 PDF Available
Title
A highly selective 1,8-naphthalimide probe for recognition of casein based on aggregation induced emission enhancement characteristics
Abstract

A water-soluble 1,8-naphthalimide-based fluorescent probe 1, bearing four acetic carboxylic groups, exhibited high selectivity and sensitivity for recognition of casein based on the aggregation induced emission enhancement (AIEE) character. The AIEE mechanism of probe 1 with casein was studied by fluorescence and circular dichroism (CD) spectra. Base on the AIEE characteristics of probe 1, a novel fluorometric method for casein quantification in the PBS (pH = 7.4) was developed. The linear range of the calibration curve was 0.1–11.0 μg mL−1 with a correlation coefficient of 0.9978. The detection limit was estimated to be 2.0 ng mL−1. The proposed method has been applied to the determination of casein in milk powder samples and the results were in good agreement with the result of Biuret method.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► A water-soluble 1,8-naphthalimide-based fluorescent probe 1 was synthesized. ► Photophysical characterization of 1 was studied. ► Binding mechanism of 1 with casein was studied ► Aggregation induced emission enhancement of 1 with casein was investigated. ► A novel casein quantification method was developed.

Keywords
1,8-Naphthalimide; Fluorescent probe; Casein quantification; Aggregation induced emission enhancement (AIEE)
First Page Preview
A highly selective 1,8-naphthalimide probe for recognition of casein based on aggregation induced emission enhancement characteristics
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 253, 1 February 2013, Pages 81–87
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering