LASER-INDUCED PHOTOCHEMICAL REACTION OF MALEIC ACID SOLUTIONS IN THE PRESENCE OF HYDROGEN PEROXIDE
1997
Targeting the selective and direct synthesis of tartaric acid (TA), the photochemical
reactions of maleic acid (MA) solutions containing H2O2. in various solvents have been
investigated using four wavelengths in the UV region between 193 and 351 nm, with high
intensity from an excimer laser. All the laser irradiations in H2O resulted in the direct
synthesis of TA with lower selectivity and it was found that, with XeF-laser (351 nm)
irradiation in 1,4-dioxane, TA is selectively and directly synthesized from MA containing
H2O2 of lower concentration at room temperature. On the other hand, none of the
irradiations in methanol, N,N-dimethylformamide, acetonitrile, and tetrahydrofuran
gave the selective formation of TA. On the basis of these results, the reaction scheme for
the selective formation of TA is discussed.
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