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固体表面材料
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     Solid Surface Fluorescence for the Determination of Protein
     蛋白质固体表面荧光分析法研究
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     SURFACE MELTING
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Infrared spectroscopy, chemisorption and pulse CO2 laser techniques have been used to investigate the behaviors of laser stimulated n- butane cracking on the surfaces of ZSM- 5 zeolite, γ- Al2O3 and SiO2 at room temperature and atmospheric pressure. A reaction mechanism of laser stimulated n-butane cracking on the solid surfaces and a model of energy transfer and relaxation in such a process are proposed based on the experimental results.

本文利用红外光谱、化学吸咐和激光表面反应技术,研究了丁烷在H-ZSM-5分子筛、SiO_2和γ-A1_2O_3表面上的激光表面反应规律;研究了不同激发模式、固体表面材料的红外特性及化学吸附能力、激光脉冲次数及脉冲间隔时间等因素对激光光能利用率的影响;证实了固体表面键激发模式的有效性,探讨了激光表面反应过程中能量吸收、积累、传递和损失的途径,提出了激光促进丁烷裂解的表面反应机理。

Infrared spectroscopy, chemisorption and pulse CO_2 laser techniques have been used to investigate the title reaction on the surfaces of SiO_2, γ-Al_2O_3 and Fe_2O_3 at room temperature and atmospheric pressure: This study has revealed that the reaction of n-butanol cracking occurred obviously on the surfaces with the help of a peculiar frequency laser excitation, the solid surface bond or the c-o and c-c bond in the adsorbed n-butanol molecules. The products of this reaction are ethane, ethene, acetylene, propylene,...

Infrared spectroscopy, chemisorption and pulse CO_2 laser techniques have been used to investigate the title reaction on the surfaces of SiO_2, γ-Al_2O_3 and Fe_2O_3 at room temperature and atmospheric pressure: This study has revealed that the reaction of n-butanol cracking occurred obviously on the surfaces with the help of a peculiar frequency laser excitation, the solid surface bond or the c-o and c-c bond in the adsorbed n-butanol molecules. The products of this reaction are ethane, ethene, acetylene, propylene, 1-butene and 2-butene; the selectivity of ethene in the reaction products is about 37%. The efficiency of laser photon energy depends strongly on the frequency and pulse interval time of the laser, on the infrared characteristics of the solid material and on the adsorbing capability of the reactant molecule. The selectivity of the reaction products depends essentially on the chemisorption state of n-butanol and on the energy transfer from the excited bond to other bonds in the adsorbent n-butanol molecules. A reaction mechanism of laser-stimulated n-butanol cracking and a model of energy transfer and relaxation in such a process are proposed based on the experimental results.

利用红外光谱、化学吸附和激光表面反应技术研究了丁醇在SiO_2、γ-Al_2O_3和Fe_2O_3上的激光表面反应规律。结果表明:固体表面材料的红外特性及化学吸附能力、激光频率等是影响激光能量利用率的主要因素;丁醇在固体表面上的吸附态及受激吸附态分子内键与键间的能量传递是影响反应产物选择性的主要因素。根据实验结果,探讨了激光促进丁醇裂解反应过程的能量传递规律,提出了激光促进丁醇裂解表面反应机理。

Infrared spectroscopy, XRD and pulse CO2 laser techniques have been employed to investigate the behaviors of laser stimulated stirface reaction (LSSR) of ethanol oxidative coupling to 1,4-butanediol upon the surface of Cu2(PO4)(OH) which was prepared by the method of precipitation. A reaction mechanism of laser stimulated ethanol okidative coupling on this solid surface and a model of energy transfer and relaxation in such a process are proposed on the basis of the experimental results. In this paper, it has...

Infrared spectroscopy, XRD and pulse CO2 laser techniques have been employed to investigate the behaviors of laser stimulated stirface reaction (LSSR) of ethanol oxidative coupling to 1,4-butanediol upon the surface of Cu2(PO4)(OH) which was prepared by the method of precipitation. A reaction mechanism of laser stimulated ethanol okidative coupling on this solid surface and a model of energy transfer and relaxation in such a process are proposed on the basis of the experimental results. In this paper, it has been shown that the LSSR is an excellent reaction technique for ethanol oxidative coupling to 1,4-butanediol. Under the conditions of atmospheric pressure and temperature of 200℃ with 1079cm-1 laser photon exciting the surface of Cu2(PO4)(OH) for 1000 times, the CH3CH2OH conversion is above 12% and the product is solely 1,4-butanediol.The vibrational excitation of the solid surface bonds is proved an effective mode for LSSR. The surface lattice oxygen of the solid material plays an important role in the -CH3 dehydrogenation of ethanol oxidative coupling reaction, and the high selectivity of reaction product deponds mainly on the special chemisorption state of ethanol, methyl-adsorbed type. With respect to the course of LSSR, it is likely that when the 1079cm-1 laser photon excites the surface P=0 bond selectively and activates its surface oxygen, the energy transfers immediately to the methylic C-H bond and activates it in the methyl-adsorbed ethanol molecule by v-v energy transfer and relaxation, then the adsorbed ethanol molecule dehydrogenates and couples to 1,4-butanediol.

利用红外光谱(IR)和激光促进表面反应(LSSR)等技术,研究了沉淀法制得Cu2(PO4)(OH)表面上的乙醇氧化偶联合成1,4-丁二醇激光表面反应机理,结果表明:固体表面键激发是激光表面反应的有效激发模式。乙醇在固体表面材料上的特定化学吸附态形式(-P=O…H-CH2CH2OH)决定了反应产物的高选择性;固体材料表面晶格氧参与反应是使标题反应能够实现的一个重要因素.

 
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