Journal of Photosciences
TiO2-Mediated Photoreactions of Cinnamic Acid and Related Compounds in Methanol
Volume 10(2003), 181-184 page
ÀúÀÚ: Sung Sik Kim, Hyun Jin Kim, Hye Jong Lee, and Sang Kyu Park
10-2-181.pdf (83.2K)
Keywords:
titanium dioxide trans-cinnamic acid trans-cinnamamide trans-cinnamaldehyde 1-naphthaldehyde 2-naphthaldehyde 9-anthraldehyde
Photochemical reactions of some organic molecules on titanium dioxide were investigated in methanol. A methanolic solution of trans-cinnamic acid and titanium dioxide was irradiated with 300 nm UV lamps for 24 h to afford methyl cinnamate. In the case of trans-cinnamamide, the major product was found to be 3-phenylpropionamide, i.e., a saturation product of ethylenic double bond. However, irradiation of urocanic acid, caffeic acid, ethyl cinnamate, trans-chalcone, trans-cinnamonitrile, trans-stilbene or trans,trans-1,4-diphenyl-1,3-butadiene on titanium dioxide under the same conditions did not give any noticeable products. Meanwhile, when irradiated some aromatic aldehydes, such as trans-cinnamaldehyde, 1-naphthaldehyde, and 2-naphthaldehyde in methanol, vicinal diols and alcohols derived from the diols were produced. On the other hand, irradiation of 9-anthraldehyde and titanium dioxide in methanol afforded only alcohols, in which diol was not observed.
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