| Summary: | 碩士 === 國立臺北科技大學 === 有機高分子研究所 === 91 === The of alkenes chemistry on catalyst surfaces (metals and metal oxides) have been the subject of intense studies. In this thesis, the adsorption, thermal reaction, and photochemistry of 3-iodopropene, 2-bromopropene and 1-bromopropene were studied on powdered TiO2 by Fourier-Transformed infrared spectroscopy (FT-IR). 3-Iodopropene was adsorbed dissociatively, forming acrolein species on TiO2, as observed by the IR absorption peaks at 2809 cm-1 (ν=CH2), 1690 cm-1 (ν C=O), 1642 cm-1 (νC=C), 1430 cm-1 (δ CH2), 1366cm-1 (δ CH), 1293 cm-1 (δ CH) and 1160 cm-1 (νC-C). No significant decomposition reaction occurred after extended photooxidation on high temperature heat treatment. 2-Bromopropene also adsorbed dissociatively on TiO2 as indicated by the IR adsorption peaks at 1161 cm-1 (νC-C), 1387 cm-1 (δs CH3), 1441 cm-1 (δas CH3), 1635 cm-1 (νC=C), 2936 cm-1 (νs CH3) and 2979 cm-1 (νas CH3). Upon irradiation, the formation of acetate and formate species on TiO2 were oberserved absorption as indicated by IR at 1560 cm-1 (νas COO), 1442 cm-1 (νs COO), 1350 cm-1 (δs CH3) acetate and at 1560 cm-1 (νas COO)、1378 cm-1 (νs COO) formate observed. The results presented in this thesis can be successfully explained by two literature reported reaction pathways for similar reaction systems.
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