MA Yong-shan, ZHANG Feng-xia, SUN You-min, WU Jun-sen, SUN Shao-hua. Synthesis and Characterization of a pH Fluorescence Probe Based on Water Soluble Perylene Diimide Derivative[J]. Chinese Journal of Luminescence, 2011,32(3): 251-255
MA Yong-shan, ZHANG Feng-xia, SUN You-min, WU Jun-sen, SUN Shao-hua. Synthesis and Characterization of a pH Fluorescence Probe Based on Water Soluble Perylene Diimide Derivative[J]. Chinese Journal of Luminescence, 2011,32(3): 251-255DOI:
Synthesis and Characterization of a pH Fluorescence Probe Based on Water Soluble Perylene Diimide Derivative
10-tetracarboxylic diimide(PTCDA)was synthesized and characterized. The UV-vis absorbance of PTCDA(10
-5
mol/L) solution is sensitive to pH value over a wide range from 10.75 to 3.97
and a gradual decrease with absorption intensity was observed as pH ranging from 10.75 to 4.73.A rapid decline in fluorescence intensity was found with pH varing from 10.75 to 9.66
while a trady reduction in fluorescence intensity was found upon a fall in pH from 9.66 to 5.12. The fluorescence of PTCDA was quenched when the pH was inferior to 5.12. The change of fluorescence spectrum and absorption spectrum can be attributed to the - stacking produced by pH value.This indicates PTCDA can be used as a pH probe in water solution.
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