Journal
DYES AND PIGMENTS
Volume 94, Issue 1, Pages 10-15Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2011.10.013
Keywords
Ratiometric; Colorimetric; Cysteine; Probe; Nucleophilic aromatic substitution; Naphthalimide
Funding
- National Nature Science Foundation of China [20975012]
- 111 Project [B07012]
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Based on the nucleophilic aromatic substitution reaction mechanism, a new highly selective probe for cysteine (Cys), N-butyl-4-bromo-3-nitro-1,8-naphthalimide (1), was designed and synthesized. The probe displayed a remarkable (58 nm) red-shift in the absorption spectra and the color changes from colorless to yellow upon reaction with Cys. The probe could detect Cys quantitatively in the range of 0 -0.9 mM by both normal and ratiometric absorption spectrometry methods. Moreover, 1 could also serve as a naked-eye probe for Cys with a minimum detectable concentration of approximately 50 mu M. (C) 2011 Elsevier Ltd. All rights reserved.
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