Abstract

Podophyllotoxin and its derivatives are very light (UV) sensitive, and can be readily photo-ionized to produce some transient species, such as radical cation, radical anion and superoxide anion radical. The laser flash photolysis of podophyllotoxin and its derivatives has been performed for the first time. The mechanism of photo-ionization has been confirmed and illustrated. In addition, the related reaction rate constants and molar extinction coefficients of the transient species have been determined.

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