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研究生:楊哲銘
研究生(外文):Che-ming Yang
論文名稱:碘乙月青在Cu(100)表面上的熱化學研究
論文名稱(外文):Thermal Chemistry of Iodoacetonitrile on Cu(100)
指導教授:林榮良
指導教授(外文):Jong-Liang Lin
學位類別:碩士
校院名稱:國立成功大學
系所名稱:化學系碩博士班
學門:自然科學學門
學類:化學學類
論文種類:學術論文
論文出版年:2008
畢業學年度:96
語文別:中文
論文頁數:59
中文關鍵詞:碘乙月青程序控溫反應/脫附反射吸收紅外光譜
外文關鍵詞:RAIRSiodoacetonitrileCu(100)TPR/D
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本篇論文是以程序控溫反應/脱附(TPR/D)和反射吸收紅外光譜(RAIRS)探討超高真空系統中,ICH2CN 在Cu(100)表面的熱化學和反應中間物。TPR/D的研究指出有生成氣相的CH3CN、HCN、H2和C2N2產物。歐傑電子譜顯示這些產物脱附後表面會殘留少量的C、N和I原子。ICH2CN在180 K吸附後分解形成-CH2CN,於240 K 時-CH2CN部份轉換成-CHCN。在240-300 K 之間,-CH2CN和-CHCN兩中間物共存於Cu(100)表面上。密度泛函數理論(DFT)預測-CH2CN最可能吸附在Atop位置。較低暴露量時,-CH2CN的C-C-N骨架可能平行於表面,但在高暴露量時,此骨架不再平行於表面。
Temperature-programmed reaction/desorption (TPR/D) and reflection absorption infrared spectroscopy (RAIRS) have been employed to investigate the thermal reactions and intermediates of ICH2CN on Cu(100) in an ultra-high vacuum system. The TPR/D study shows the evolution of reaction products of CH3CN, HCN, H2 and C2N2. After the desorption of the products, atomic C, N and I are left on the surface, examined by Auger electron spectroscopy. The RAIRS investigation shows that -CH2CN is generated from ICH2CN dissociative adsorption on Cu(100) at 180 K. A part of -CH2CN molecules transforms to -CHCN at 240 K. Between 240-300K,-CH2CN and -CHCN is coexist on the surface. Theoretical calculation predicts that -CH2CN is most likely to be adsorbed at atop sites on Cu(100). -CH2CN generated at low coverages has its C-C-N backbone approximately parallel to the surface. At higher coverages, the backbone tilts away from the surfaces.
第一章、緒論
1.1 表面的定義......................................1
1.2 表面吸附的形式..................................1
1.3 真空的定義及應用................................2
1.4 Cu(100)面......................................3
1.5研究動機........................................4
第二章、表面研究之分析技術
2.1 歐傑電子能譜....................................5
2.2 程式控溫反應/脫附..............................10
2.3 反射吸收紅外光譜儀.............................12
第三章、實驗系統與方法
3.1 超高真空系統..................................14
3.2 Cu(100)單晶表面的清潔方法.....................16
3.3 藥品及其前處理................................18
第四章、結果與討論
4.1 程序控溫反應/脫附研究.........................19
4.2 反射吸收紅外光譜研究及表面中間物之理論預測....34
4.3 反應機制探討..................................52
第五章、結論......................................55
參考文獻..........................................56
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