VUV Photo-reactions over Solid Surfaces studied by Techniques of Surface Science
通过表面科学技术研究固体表面上的真空紫外光反应
基本信息
- 批准号:05650034
- 负责人:
- 金额:$ 1.34万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for General Scientific Research (C)
- 财政年份:1993
- 资助国家:日本
- 起止时间:1993 至 1994
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Surface photochemistry has been applied to the preraration of thin films of metal and semiconductor for microelectronics. The purpose of this study is to investigate a mechanism of the photodecomposition of iron pentacarbonyl(Fe(CO)_5, IPC)adsorbed on solid surfaces at low temperatures using IR reflection absorption spectroscopy, X-ray photoelectron spectroscopy, and thermal desorption spectroscopy, and to examine effects of the physical and chemical properties of solid surface on the reactions.The results are summarized as follows.1.IPC is molecularly adsorbed on clean Ag, Au(111), and SiO_2 surfaces at tenperatures bellow 150K and undergoes photodecarbonylation upon irradiation with the light of wavelengths < 360nm.The photoproduct is the oligomer of Fe(CO)_4, which is quite stable under illumination but undergoes thermal decomposition at temperatures above 300K to deposit Fe metal on the surface. A mechanism of the thermal process depends on the catalytic properties of substrate surface.2.The dependence of photo-decarbonylation yield on the wavelength of light was observed for Ag and Au substrates and found different from the absorption spectrum of gas phase IPC.On Ag surfaces the yield is maximized at around 320 nm, at which gaseous IPC shows little absorption, while on Au(111) the decarbonylation occurs at significant yield at around 320nm but exhibits no maximum yield in longer wavelength range. These results show that the adsorption of IPC on solid surfaces would lead to the red shift of absorption spectrum. In addition, the photoexcitation of Ag surface plasmon(3.88eV * 320nm)could cause the decarbonylation of adsorbed IPC.
表面光化学已被应用于微电子用金属和半导体薄膜的制备。本文用红外反射吸收光谱、X射线光电子能谱和热脱附谱研究了吸附在固体表面的五羰基铁(Fe(CO)_5,IPC)在低温下的光分解机理。考察了固体表面的物理化学性质对反应的影响,结果如下:1. IPC分子吸附在在低于150 K的温度下清洁Ag、Au(111)和SiO_2表面,在波长<360 nm的光照射下发生光脱羰反应,光产物是Fe(CO)_4的低聚物,它在光照下很稳定,但在高于300 K的温度下发生热分解,在表面上存款Fe金属。2.在Ag和Au衬底上,光脱羰反应的产率与光的波长有关,这与气相IPC的吸收光谱不同,在Ag衬底上,产率在320 nm附近达到最大值,而气相IPC在320 nm附近几乎没有吸收,而在Au(111)上,在320 nm附近发生显著的脱羰基反应,但在较长的波长范围内没有表现出最大产率。这些结果表明,IPC在固体表面的吸附会导致吸收光谱的红移。此外,Ag表面等离子体激元(3.88eV * 320nm)的光激发也能引起IPC的脱羰基反应。
项目成果
期刊论文数量(28)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
T.Urisu: "Meleculor orientation and photochemical reaction of organo-aluminum compounds inrestigated by buried metal IRAS" Jpn.J.Appl.Phep.33. 7123-7129 (1994)
T.Urisu:“埋藏金属 IRAS 引起的有机铝化合物的分子取向和光化学反应”Jpn.J.Appl.Phep.33。
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S.Sato: "Surface intermediotes formed during photolytic decarbonylation of iron peutacarbonyl adsorbed on silver sulface" Appl.Sarf.Sci.79/80. 428-433 (1994)
S.Sato:“吸附在硫磺上的焦羰基铁光解脱羰过程中形成的表面中间体”Appl.Sarf.Sci.79/80。
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S.Sato: "Photochemical diodes of a TiO_2 film prepared by a sol-gel method" Catal.Lett.26. 141-147 (1994)
S.Sato:“溶胶-凝胶法制备的 TiO_2 薄膜的光化学二极管”Catal.Lett.26。
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S.Sato: "Infrared reflection absorption spectroscopy, X-ray photoelectron spectroscopy and temperature-programd desorption study on the adsorption and decomposition of Fe(CO)_5 over silver surfaces" J.Chem.Soc.Faraday Trans.89. 4387-4392 (1993)
S.Sato:“银表面 Fe(CO)_5 吸附和分解的红外反射吸收光谱、X 射线光电子能谱和程序升温解吸研究”J.Chem.Soc.Faraday Trans.89。
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- 影响因子:0
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S.Sato: "Mechanism of the phctolysis of izon pentacarlonyl adsorbed on a pt surface" Surf.Sci.283. 137-142 (1993)
S.Sato:“吸附在 pt 表面上的 izon pentacarlonyl 光解机制”Surf.Sci.283。
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相似海外基金
Ligand substitution dynamics of solvated iron pentacarbonyl measured by ultrafast x-ray absorption spectroscopy
超快 X 射线吸收光谱测量溶剂化五羰基铁的配体取代动力学
- 批准号:
0405599 - 财政年份:2004
- 资助金额:
$ 1.34万 - 项目类别:
Continuing Grant