Synthesis and Spectrophotometric P-H Sensing Applications of Poly-2-[4-(diethylaminophenyl)imino]-5-nitro-phenol and its Schiff Base Monomer for Two Different P-H Ranges

KAYA İ. , AYDIN A. , Yildirim M.

JOURNAL OF FLUORESCENCE, vol.22, no.1, pp.495-504, 2012 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 22 Issue: 1
  • Publication Date: 2012
  • Doi Number: 10.1007/s10895-011-0983-3
  • Title of Journal : JOURNAL OF FLUORESCENCE
  • Page Numbers: pp.495-504
  • Keywords: Polyazomethine, P-H sensor, Fluorescence, Schiff base, Differential scanning calorimetry, ELECTRICAL-CONDUCTIVITY, SENSOR, SUBSTITUENT, SOLUBILITY, PROBE


Poly-2-[4-(diethylaminophenyl) imino]-5-nitrophenol (PEAPINP) and 2-[4-(diethylaminophenyl) imino]5- nitro-phenol (EAPINP) were prepared as new pH sensors. Spectrophotometric and spectrofluorometric response of the novel sensors in various p(H) values were investigated. EAPINP has the ability to respond linearly at alkaline p(H) values, 8 to 9, and can be utilized in absorption and wavelength radiometric methods. PEAPINP has the ability to respond linearly at lower pH values, 6 to 7, and can be used as an alternative pH sensor in this range. The new sensors are yellow-colored in acidic and neutral media and red-colored in alkaline P(H)s. With their colorimetric responses at different pH ranges EAPINP and PEAPINP can be used to develop color-tunable P-H sensors.