Research on Chemical Intermediates

, Volume 19, Issue 4, pp 299–306 | Cite as

Transient absorption spectra and photochromic mechanism of schiff bases

  • F. Wang
  • L. Qin
  • M. Fan


The transient absorption spectra of salicylideneaniline (SA) and salicylidenebenzylamine (SBA) have been investigated by means of the nanosecond laser flash photolysis. It has been found that the intermediates from the two compounds have different properties. According to the properties of the intermediates for compound SA, the primary photoproduct is a zwitterion produced by the excited singlet state, rather than a trans- keto isomer. The intermediate of compound SBA also was found to be a zwitterion, but produced not only by the excited singlet state but also by the excited triplet state. The photochromic mechanisms of the two compounds are proposed and discussed respectively.


Transient Absorption Zwitterion Excited Singlet State Excited Triplet State Transient Species 
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Copyright information

© VSP 1993

Authors and Affiliations

  • F. Wang
    • 1
  • L. Qin
    • 1
  • M. Fan
    • 1
  1. 1.Institute of Photographic ChemistryAcademia SinicaBeijingChina

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