Acta Phys. -Chim. Sin. ›› 1991, Vol. 7 ›› Issue (05): 582-585.doi: 10.3866/PKU.WHXB19910513

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The Change of Absorption Spectrum of 4-Hydroxybenzylidene Malononitrile Solution Under Conditions of Different pH Value

Wang Peng-Fei; Wu Shi-Kang   

  1. Institute of Photographic Chemistry, Academia Sinica, Beijing 100101
  • Received:1990-04-04 Revised:1990-09-12 Published:1991-10-15
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Abstract: The absorption spectra of 4-hydroxybenzylidene malononitrile in different solvent systems have been studied in this work. It was found that this compound has a proton equilibrium under the different pH condition that results in a variation of absorption spectra observed. Thereby, the title compound is expected to be used as a new acidic indicator in nonaqueous media.

Key words: 4-Hydroxybenzylidene malononitrile, Proton equlilibrium, Acidicindicator in nonaqueous media