Abstract
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 μM.
Original language | English |
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Pages (from-to) | 10-15 |
Number of pages | 6 |
Journal | Dyes and Pigments |
Volume | 94 |
Issue number | 1 |
DOIs | |
Publication status | Published - Jul 2012 |
Keywords
- Colorimetric
- Cysteine
- Naphthalimide
- Nucleophilic aromatic substitution
- Probe
- Ratiometric