Formation, structures, and properties of organic monomolecular, monatomic, and the piled-up layers

有机单分子、单原子和堆积层的形成、结构和性质

• 批准号: 12490012
• 负责人: OZAKI Hiroyuki
• 金额: $ 9.22万
• 依托单位: Tokyo University of Agriculture and Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12490012/
• 关键词: organic monatomic layer; alkadiyne; atomic sash; monolayer polymerization; scanning tunneling microscopy; Penning ionization electron spectroscopy; ultraviolet photoelectron spectroscopy; infrared reflection absorption spectroscopy; 反応性鎖状分子; 蒸着単分

1.To investigate the formation, geometrical and electronic structures, and the properties of monolayers comprising reactive molecules or networked carbon atoms laid flat on solid surfaces as well as the piled-up layers, we have developed a low-temperature scanning tunneling microscope which can be connected to our photo-and Penning electron spectrometer. We have obtained the following conclusions on the monolayers of alkadiyne or sashlike polydiacetylene (PD), atomic sash (AS) prepared on graphite (0001) surfaces. In a monomer monolayer prepared by evaporation onto a substrate held at room temperature, molecules form large (1000Å) domains with column structure although they are, liable to be desorbed, while they provide small ones at low temperature. When a monolayer prepared at 150 K is annealed at 220 K, molecules obtain suitable mobility for monolayer polymerization, loosing the column structure. when irradiated with UV light at 220 K, the molecules are transformed into AS-I in a lo … More w temperature phase having raised" PD chains orthogonal to alkyl chains with gauche conformation at f3-y methylenes. Heating the AS-I to room temperature yields A S-II in a high temperature phase ; the alkyl and PD chains intersect at ca. 70゜ and are maintained in a common plane.On cooling, the AS-II is transformed back to the AS-I. Furthermore, there are two kinds 'of AS-II with different molecule-substrate commensurations. In addition, the phase transition and deformation of a single PD chain can be induced by an STM tip.2.We carried out infrared reflection absorption spectroscopy for alkadiyne on Au(111) and found that all-trans molecules are laid flat with a column structure as in a vapor-deposited monolayer on graphite if the monolayer is prepared by adsorption from a solution. Transformation to AS is now under investgation.3.We have developed a program to synthesize the Penning ionization electron spectra of solid phase molecules theoretically for expected molecular orientation and arrangement. The flat-on and tilted-on orientation were verified for the mono-and multilayers of long chain molecules on graphite, respectively, by comparing the synthesized and observed spectra. Less

1.为了研究由活性分子或网状碳原子组成的单层膜的形成、几何结构和电子结构，以及单层膜的性质，我们研制了一台低温扫描隧道显微镜，它可以连接到我们的光电子能谱仪和潘宁电子能谱仪。我们在石墨（0001）表面上制备了链二炔（PD）、链二炔（AS）单分子膜，得到了以下结论。在通过蒸发到保持在室温下的衬底上制备的单体单层中，分子形成具有柱结构的大（1000 μ m）域，尽管它们易于解吸，而它们在低温下提供小域。当在150 K下制备的单层在220 K下退火时，分子获得单层聚合的合适的迁移率，松散的柱结构。在220 K的紫外光照射下，分子迅速转化为AS-1， ...更多信息 具有垂直于在f3-y亚甲基处具有偏置构象的烷基链的升高的”PD链"。将AS-I加热至室温产生高温相的AS-II;烷基和PD链在约100 ° C处相交。冷却后，AS-II又变回AS-I。此外，还存在两种不同分子-底物构型的AS-Ⅱ。此外，STM针尖还可以诱导PD单链的相变和形变。2.我们对链二炔在Au（111）表面的红外反射吸收光谱进行了研究，发现如果从溶液中吸附制备单分子膜，则全反式分子在石墨表面呈现出与气相沉积单分子膜一样的柱状结构。3.我们开发了一个程序，从理论上合成了固相分子的Penning电离电子能谱，以获得预期的分子取向和排列。通过比较合成的光谱和观测的光谱，分别验证了单层和多层长链分子在石墨上的取向为平贴和倾斜贴。少

项目成果

Hiroyuki Ozaki: "Growth of Organic Ultrathin Films Studied by Penning Ionization Electron and Ultraviolet Photoelectron Spectroscopies : Pentacene"Journal of Chemical Physics. 113. 6361-6375 (2000)

Hiroyuki Ozaki：“通过潘宁电离电子和紫外光电子能谱研究有机超薄膜的生长：并五苯”化学物理杂志。

Satoshi Irie: "STM Study in Polymerization of 17,19-Hexatriacontadiyne Monolayer"Probe Microscopy. 2. 1-9 (2000)

Satoshi Irie：“17,19-Hexatriacontadiyne 单层聚合的 STM 研究”探针显微镜。

Satoshi Irie, Seiji Isoda, Takashi Kobayashi, Hiroyuki Ozaki, Yasuhiro Mazaki: "STM Study on Polymerization of 17,19-Hexatriacontadiyne Monolayer"Probe Microscopy. 2. 1-9 (2000)

Satoshi Irie、Seiji Isoda、Takashi Kobayashi、Hiroyuki Ozaki、Yasuhiro Mazaki：“17,19-Hexatriacontadiyne 单层聚合的 STM 研究”探针显微镜。

Masanori Suhara, Hiroyuki Ozaki: "Local Exterior Electron Density and Molecular Orientation Reflected in Penning Ionization Electron Spectra : n-Alkane Mono-and Multilayers on Graphite"Journal of Electron Spectroscopy and Related Phenomena. 137-140. 199-2

Masanori Suhara、Hiroyuki Ozaki：“彭宁电离电子光谱中反映的局域外部电子密度和分子取向：石墨上的正烷烃单层和多层”电子光谱及相关现象杂志。

Hiroyuki Ozaki, Masanori Suhara, Taku Ohashi, Naoya Toda, Osamu Endo, Hideyuki Tukada: "Electron Spectroscopy of Extrathin Network Structures Constructed by Self-Assembly of Planar Molecules on a Solid Surface"Journal of Electron Spectroscopy and-Related

Hiroyuki Ozaki、Masanori Suhara、Taku Ohashi、Naoya Toda、Osamu Endo、Hideyuki Tukada：“固体表面上平面分子自组装构造的超薄网络结构的电子能谱”电子能谱及相关杂志