1. A novel homolateral and dicationic AIEgen for the sensitive detection of casein.
- Author
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Li, Zenghe, Wang, Lianying, Guan, Weijiang, Ding, Caifeng, Yuan, Zhiqin, and Lu, Chao
- Subjects
CASEINS ,HYDROPHOBIC interactions ,STANDARD deviations ,DRIED milk ,DETECTION limit ,AMINO acids - Abstract
The exploitation of highly soluble and responsive AIEgens is essential for further expansion of their practical applications. In this study, dipropyltrimethylammonium bromide-substituted TPE (denoted as o-TPEDTA), a homolateral and dicationic AIEgen, was synthesized and applied for the turn-on detection of casein via hydrophobic interactions. The rapid and sensitive detection of casein was achieved using the designed o-TPEDTA probe with the limit of detection of 0.05 μg mL
−1 . The satisfying selectivity of over 1000-fold concentration of other probably existing chemicals, including amino acids, sugars and salts, was achieved due to the strong binding affinity between o-TPEDTA and casein. The evaluation of casein in milk powder samples with small relative standard deviations was realized using the o-TPEDTA probe. The accuracy of the o-TPEDTA probe-based detection method was validated by the consistency of the casein detection results with those obtained via a national standard casein evaluation approach. [ABSTRACT FROM AUTHOR]- Published
- 2019
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