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Heat capacity and thermodynamical properties of the crystal of [RE_2(Glu)_2(H_2O)_8](ClO_4)_4·H_2O (RE = Nd, Eu, Dy)

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Science china Chemistry 2009年第7期52卷 862-867页

作者： WU XinMin1, LI Wei1, TAN ZhiCheng2 & QU SongSheng3 1 Department of chemical Engineering, Beijing institute of Petro-chemical Technology, Beijing 102617, china 2 thermochemistry laboratory, dalian institute of chemical physics, chinese academy of sciences, dalian 116023, china 3 College of Chemistry and Molecular Science, Wuhan University, Wuhan 430072, china Department of chemical Engineering Beijing Institute of Petro-chemical Technology Beijing 102617 China thermochemistry laboratory Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China College of Chemistry and Molecular Science Wuhan University Wuhan 430072 China

Thermodynamical data of rare earth complexes with amino acid are important for engineering chemistry and fundamental chemistry. However, they have rarely been reported. In this work, a series of crystalline complexes of rare earth perchlorate coordinated with glutamic acid have been synthesized in water medium, and their thermodynamical data, including the heat capacity in low temperature range and the standard enthalpy of formation, were determined. These complexes were identified to be [RE2(Glu)2(H2O)8](ClO4)4·H2O (RE = Nd, Eu, Dy) by using thermogravimetric analysis (TG), differential thermal analysis (DTA), and chemical and elementary analyses. Their purity has been determined. No melting points were observed for all the three complexes. The heat capacity of the complexes was measured by an adiabatic calorimeter from 79 to 370 K. Abnormal heat capacity values were detected for two of the complexes and the decomposition range of one complex was found. The temperature, enthalpy change and entropy change of the decomposition processes of the three complexes were calculated. The polynomial equations of heat capacity in the experimental temperature range have been obtained by least squares fitting. The standard enthalpy of formation was determined by an isoperibol reaction calorimeter at 298.15 K.

关键词： complex of rare earth, [RE2(Glu)2(H2O)8](ClO4)4·H2O (RE = Nd, Eu, Dy Glu = glutamic acid), low-temperature heat capacity, standard enthalpy of formation

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Cluster-based composition rule for Laves phase-related BCC solid solution hydrogen storage alloys

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Rare Metals 2006年第z1期25卷 252-255页

作者： WANG Qing CHEN Feng WU Jiang QIANG Jianbing DONG Chuang ZHANG Yao XU Fen SUN Lixian State Key laboratory of Materials Modification Dalian University of Technology Dalian 116024 China State Key Laboratory of Materials Modification Dalian University of Technology Dalian 116024 China State Key Laboratory of Materials Modification Dalian University of Technology Dalian 116024 China State Key Laboratory of Materials Modification Dalian University of Technology Dalian 116024 China State Key Laboratory of Materials Modification Dalian University of Technology Dalian 116024 China International Center of Materials physics Metals Research Institute Chinese Academy of Sciences Shenyang 110015 China Materials & Thermochemistry Laboratory Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China Materials & Thermochemistry Laboratory Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China Materials & Thermochemistry Laboratory Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China

A new cluster line approach for the composition rule of Laves phase-related BCC solid solution hydrogen-storage alloys was presented. The cluster line in a ternary phase diagram refers to a straight composition line linking a specific binary cluster to the third element. In the Laves phase-related BCC solid solution alloy system such as Ti-Cr-V, Ti-Cr tends to form binary Cr2Ti Laves phase while Ti-V and Cr-V to form solid solutions. This Laves phase is characterized by a close-packing icosahedral cluster Cr7Ti6. A cluster line Cr7Ti6-V is then constructed in this system. Alloy rods with a diameter of 3 mm of compositions along this line were prepared by copper-mould suction method. The alloy structure is found to vary with the V contents. Furthermore, the P-C-T measurements indicate that the cluster-line (Cr7Ti6)1-xVx alloys have large hydrogen storage capacities.

关键词： Ti-Cr-V alloys composition rule cluster hydrogen storage

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Adsorption and reaction of CO and O_2 on the Ag/Pt(110) surface studied by photoemis-sion electron microscopy

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chinese Science Bulletin 2001年第12期46卷 998-1002页

作者： HUANG Weixin & BAO XinheState Key laboratory of Catalysis, dalian institute of chemical physics, chinese academy of sciences, dalian 116023, china State Key laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian China

The Ag/Pt(110) model catalyst was prepared by evaporating silver on Pt(110). Adsorption and reaction of CO and O2 on Ag/Pt(110) surface were studied in situ by photo-emission electron microscopy (PEEM) during the pressure range of 10-5-10-2 Pa at 480 K. The Ag/Pt(110) surface consisted of Pt(110), AgPt interface and Ag area after annealing at 500 K. The dosing pressure of CO and O2 had a larger influence on their adsorption on the Ag area than on the Pt(110) and AgPt interface. Small Pt clusters formed on the Ag area and AgPt interface, which had a stronger ability to adsorb CO than Pt(110) terrace. The existence of Ag had an obvious influence on the kinetic of CO oxidation on Pt(110). No pattern was observed on the AgPt interface under the same condition when the formation of reaction-diffusion waves occurred on Pt(110).

关键词： silver Pt(110) carbon monoxide oxygen adsorption reaction photoemission electron microscopy.

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THE　THEORY　OF　RESONANT　AND　NONRESONANT　PUMP－PROBE　POLARIZATIONSPECTROSCOPYFORGROUND－STATECOHERENCE

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chinese chemical Letters 1996年第4期7卷 353-356页

作者： Yi ZHAO Guo Zhong HE(State Key laboratory of Molecular Reaction Dynamics, dalian institute of chemical physics. chinese academy of sciences, dalian 116023) chinese ACAD SCI DALIAN INST CHEM PHYSSTATE KEY LAB MOL REACT DYNAMDALIAN 116023PEOPLES R CHINA

A density matrix treatment of the time evolution of the third order polarization response describing the ground state coherence induced by ultrafast pulses is given. The explicit formulas of polarization response for nonresonant and resonant excitation are derived. The results show that the signal can be greatly enhanced in case of resonance. For specification, we discuss the ground- state rotational coherence based on the if irreducible tensor algebra.

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A ^(13)CO isotopic study on the CO promotion effect in methane dehydroaromatization reaction over a Mo/HMCM-49 catalyst

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Journal of Natural Gas Chemistry 2010年第1期19卷 1-5页

作者： Songdong Yao, Changyong Sun, Juan Li, Xiumin Huang, Wenjie Shen State Key laboratory of Catalysis, dalian institute of chemical physics, chinese academy of sciences, dalian 116023, Liaoning, china [a] State Key laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 Liaoning China

The promotion effect of CO in methane dehydroaromatization was investigated using ^13CO probe molecules. By alternative injection of ^13CO to the methane feed, the distribution of ^13CxC6-xH6（x= 0-3） products changed significantly, confirming the participation of ^13CO in the reaction network. The addition of ^13CO did not change the conversion of CH4 but improved slightly the durability of the methane dehydroaromatization （MDA） reaction, which might be caused by the interaction of the dissociated oxygen species and the deposited carbon species. The ratio of ^13CxC6-xH6 （x = 0-3） varied with the time on stream, which was determined by the competitive reactions of methane decomposition and ^13CO dissociation.

关键词： ^13CO labeling methane dehydroaromatization Mo/HMCM-49 catalyst deactivation

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H_2 production with low CO selectivity from photocatalytic reforming of glucose on metal/TiO_2 catalysts

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Science china Chemistry 2008年第2期51卷 97-100页

作者： WU GuoPeng1,2, CHEN Tao2, ZHOU GuoHua 2, ZONG Xu2 & LI Can2 1 laboratory of Plasma Physical Chemistry, dalian University of Technology, dalian 116024, china 2 State Key laboratory of Catalysis, dalian institute of chemical physics, chinese academy of sciences, dalian 116023, china laboratory of Plasma Physical Chemistry Dalian University of TechnologyDalian 116024China State Key laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

H2 with low CO concentration is produced via photocatalytic reforming of glucose (as a representative of biomass component) on metal/TiO2 catalyst (metals: Pt, Rh, Ru, Ir, Au, Ni, Cu). It is shown that the loaded metals generally enhance the rate of H2 production, while they depress the CO selectivity. Both H2 production and CO selectivity are strongly dependent on the kind of deposited metals on TiO2. For example, Rh/TiO2 catalyst is found to be most active for H2 production while with the most extremely low CO concentration from the photocatalytic reforming of glucose.

关键词： photocatalysis H2 production CO selectivity glucose metal (Rh Pt Ru Ir Au Cu or Ni)/TiO2

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Algebraic approach to stretching vibrational spectrum of H_2S

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chinese Science Bulletin 1999年第21期44卷 1961-1964页

作者： FENG Zhaochi, XIONG Guang, YANG Qihua, XIN Qin and LI CanState Key laboratory of Catalysis , dalian institute of chemical physics , chinese academy of sciences , dalian 116023, china State Key laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian China

The stretching vibrational spectra of H2S have been calculated by using the algebraic model, and the local mode characteristics have been analyzed. Within the vibrational quanta v=5, the standard deviation is 1.71 cm-... 详细信息

关键词： algebraic model vibrational spectrum local mode.

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A strategy with label-free quantification of the targeted peptides for quantitative peptidome analysis of human serum

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Science china Chemistry 2010年第4期53卷 759-767页

作者： ZHU Jun, WANG FangJun, DONG XiaoLi, YE MingLiang & ZOU HanFa Key laboratory of Separation sciences for Analytical Chemistry National Chromatographic Research and Analysis Center dalian institute of chemical physics, chinese academy of sciences, dalian 116023, china 1. Key laboratory of Separation sciences for Analytical Chemistry Chinese Academy of Sciences Dalian 116023 China2. National Chromatographic Research and Analysis Center Chinese Academy of Sciences Dalian 116023 China3. Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China

Peptidomics draws more and more attention in discovering useful biomarkers for early diagnosis of disease. However, there is lack of efficient quantification strategy in peptidome analysis. In this study, a strategy with label-free quantification of the targeted endogenous peptides based on peak intensity using μUPLC-Q-TOF-MS/MS was developed for quantitative peptidome analysis of human serum. Different amounts of standard BSA tryptic digesting peptides were added into the same serum extracts for evaluation of the developed strategy, and it was observed that the average relative error of the targeted peptides was 6.42%, which was superior to the result obtained directly by commercially available software PLGS. It was also demonstrated that this quantification strategy could obviously increase the detection sensitivity of the peptide by DDA analysis. Then, this strategy was applied to comparatively analyze the peptides extracted from the serum of HCC or breast cancer patients and healthy individuals, respectively. Peptides with charge states up to 5 and molecular weight over 4000 can be reliably identified and quantified. This quantitative analysis method based on μUPLC-Q-TOF-MS/MS exhibited superior sensitivity than that by MALDI-TOF-MS commonly used in peptidome analysis. Finally, some interesting endogenous peptides related to corresponding diseases were successfully obtained.

关键词： peptidomics label-free quantification hepatocellular carcinoma breast cancer human serum

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DEHYDROGENATION AND AROMATIZATION OF CH4 IN THE ABSENCE OF O2 ON Mo/HZSM-5

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chinese Journal of Catalysis 1996年第2期17卷 99-100页

作者： Liu Wei Xu Yide Liu Shetian Guo Xiexian (State Key laboratory of Catalysis, dalian institute of chemical physics,chinese academy of sciences, dalian 116023) State Key laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023

ＤＥＨＹＤＲＯＧＥＮＡＴＩＯＮＡＮＤＡＲＯＭＡＴＩＺＡＴＩＯＮＯＦＣＨ＿４ＩＮＴＨＥＡＢＳＥＮＣＥＯＦＯ＿２ＯＮＭｏ／ＨＺＳＭ－５￥ＬｉｕＷｅｉ；ＸｕＹｉｄｅ；ＬｉｕＳｈｅｔｉａｎ；ＧｕｏＸｉｅｘｉａｎ（ＳｔａｔｅＫ... 详细信息

ＤＥＨＹＤＲＯＧＥＮＡＴＩＯＮＡＮＤＡＲＯＭＡＴＩＺＡＴＩＯＮＯＦＣＨ＿４ＩＮＴＨＥＡＢＳＥＮＣＥＯＦＯ＿２ＯＮＭｏ／ＨＺＳＭ－５￥ＬｉｕＷｅｉ；ＸｕＹｉｄｅ；ＬｉｕＳｈｅｔｉａｎ；ＧｕｏＸｉｅｘｉａｎ（ＳｔａｔｅＫｅｙＬａｂｏｒａｔｏｒｙｏｆＣａｔ...

关键词： methane dehydrogenation aromatization Mo/HZSM- 5

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OPTICAL DETERMINATION OF THE PRODUCT ALIGNMENT FOR A SYMMETRIC TOP

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原子与分子物理学报 1998年第S1期15卷 329-331页

作者： Han KeliState Key laboratory of Molecular Reaction Dynamics, dalian institute of chemical physics,chinese academy of sciences, dalian china 116023

Ｔｈｅｅａｒｌｓｔｕｄｙｏｆｃｈｅｍｉｃａｌｒｅａｃｔｉｏｎｄｙｎａｍｉｃｓｈａｓｂｅｅｎｍａｉｎｌｙｆｏｃｕｓｅｄｏｎｔｈｅｍｅａｓｕｒｅｍｅｎｔｏｆｓｃａｌａｒｐｒｏｐｅｒｔｉｅｓｓｕｃｈａｓｒａｔｅｃｏｎｓｔａ...

Ｔｈｅｅａｒｌｓｔｕｄｙｏｆｃｈｅｍｉｃａｌｒｅａｃｔｉｏｎｄｙｎａｍｉｃｓｈａｓｂｅｅｎｍａｉｎｌｙｆｏｃｕｓｅｄｏｎｔｈｅｍｅａｓｕｒｅｍｅｎｔｏｆｓｃａｌａｒｐｒｏｐｅｒｔｉｅｓｓｕｃｈａｓｒａｔｅｃｏｎｓｔａｎｔｓ，ｃｒｏｓｓｅｃｔｉｏｎｓ，...

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