Abstract
New BODIPY dyes have been synthesized via the condensation of R-CH2COCl (R = H, Br, Cl and Et2N) with 2,4-dimethylpyrrole and the coordination with BF3 etherate. The acetyl chlorides with electron-withdrawing substituents (R = Br or Cl) are easier to react with the 2,4-dimethylpyrrole to form the related dyes and make a red-shift in absorbance and fluorescence maximum. Dye 4 (R = Et2N), based on PET mechanism, exhibits good properties as a pH fluorescent sensor with a pKa of 8.74 and a 15-fold fluorescence enhancement in the pH range of 9.38-7.60.
Original language | English (US) |
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Pages (from-to) | 206-210 |
Number of pages | 5 |
Journal | Dyes and Pigments |
Volume | 73 |
Issue number | 2 |
DOIs | |
State | Published - 2007 |
Keywords
- BODIPY
- Biological label
- Fluorescent dyes
- PET
- pH probe
ASJC Scopus subject areas
- Chemical Engineering(all)
- Process Chemistry and Technology