Reaction in Two Dimensional Space at the Solid Surface. Control of Reaction Using the Metastable Atom as a Probe

1十六烷二炔(HTDY，C_&lt；16&gt；H_&lt；33&gt；C=CC=CC_&lt；16&gt；H_&lt；33&gt；)和DOToriaconatetyne(DTTY，HC=CC_&lt；12&gt；H_&lt；24&gt；C=CC=C-C_&lt；12&gt；H_&lt；24&gt；在213K的石墨解理面上用气相沉积法制备了Hc=C)薄膜，并用Penning电离电子能谱(PIES)监测了紫外光照射下薄膜中的反应过程。结果表明：(1)在213K的石墨平面上，分子链平行于衬底；(2)在紫外光照射下，分子间发生聚合反应。对于HTDY，分子中心的两个三键参与了反应，而对于DTTY，分子中心和末端的四个三键参与了反应。(3)聚合反应在衬底上形成了单层分子片(或原子布)。2.亚稳态电子…观察二维空间反应更多的发射显微镜(1)为了灵敏地探测分子的扩散和反应，观察了局部区域表面的Penning电离电子能谱和能量滤波图像。前者提供了分子在表面局部区域的取向和电子态的信息，而后者使我们能够绘制分子在表面的取向分布。本文首次对能量滤波图像进行了观察。(2)研究了酞菁在石墨和MoS_2解理面上以及在单晶硅表面上的分子扩散和反应。结果表明：(A)在石墨表面，分子扩散迅速，其分子平面平行于衬底平面定向；(B)在MoS_2上，分子缓慢扩散并平行于衬底取向，如(A)加热衬底时的情况。(C)在硅单晶表面，分子与衬底发生反应，没有观察到分子扩散。较少

1 Polymerization Reaction in Monolayr FilmFilms of hexatriacontadiyne (HTDY,C_<16>H_<33> C=CC=CC_<16>H_<33>) and dotoriacontatetrayne (DTTY,HC=CC_<12>H_<24> C=CC=C-C_<12>H_<24>HC=C) were prepared by vapor deposition onto a graphite cleavage plane held at 213 K.The process of the reaction in the films induced by irradiation with ultraviolet light was monitored by Penning ionization electron spectroscopy (PIES). The following findings were made.(1) On the graphite plane at 213 K molecular chains are oriented parallel to the substrate.(2) Polymerization reaction proceed among molecules by UV irradiation. For HTDY the two triple bonds at the center of the molecule are involved in the reaction, where for DTTY the four triple bonds at the center and the ends of the molecule take part in the reaction.(3) The monolayr molecular sheet (or atomic cloth) is formed on the substrate as a result of the polymerization reaction.2 Observation of Reaction in Two Dimensional Space by Metastable Electron … More Emission Microscope(1) In order to probe the molecular diffusion and reaction sensitively, the Penning ionization electron spectrum of the surface in the local region and the energy-filtered image were observed. The former provides information on the molecular orientation and the electronic state in the local region of the surface, whereas the latter enables us to map the distribution of the molecular orientation at the surface. The observation of the energy-filtered image was carried out for the first time in this study.(2) The molecular diffusion and the reaction of phthalocyanines were studied on cleavage planes of graphite and MoS_2 as well as on a Si single crystal surface. The following findings were made : (a) On graphite molecules diffuse rapidly and orient with their molecular planes parallel to the substrate plane. (b) On MoS_2 molecules diffuse slowly and orient parallel to the substrate as in the case of (a) upon heating the substrate. (c) On the Si single crystal surface, molecules react with the substrate and no molecular diffusion is observed. Less