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SYNGAS CONVERSION ON THE COPPER-COBALT CATALYSTS

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Journal of Energy Chemistry 1993年第3期 173-184页

作者： KIENNEMANN A. KIEFFER R. Laboratire de Chimie Organique Appliquce UA CNRS 469 EIIICS 1 rue Blaise Pascal Strasbourg france 67008 Laboratire de Chimie Organique Appliquce UA CNRS 469 EIIICS 1 rue Blaise Pascal Strasbourg france 67008

The CO + H2reaction was studied under a pressure or 6MPa overCo/CuLaZr catalysts prepared by impregnation method. The C2+OH formationincreased with the cobalt percentage, caused probably by the augmentation ofthe number of the Co-Cu bisites, and the C2+HC formation increased simulta-neously, explained by common reactional intermediates. It was indicated thatthere was an interaction between CuO and CoOxwithin the Co/CuLaZr cata-lyst. The results of C2H4addition to syngas show that the addition of Co ontoCuLaZr leads to an augmentation of CO insertion and a diminution of the hy-drogenation capacity of the system.

关键词： Cu Co SYNGAS CONVERSION ON THE COPPER-COBALT CATALYSTS Zr CO

GEOCHEMICAL EVOLUTION OF POLYTERPENES AND STEROIDS

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有机化学 1987年第4期 296-298页

作者： P.Albrecht 67008 Strasbourg Université Louis Pasteur Institut de Chimie france 1 rue Blaise Pascal

All geological samples(recent orancient sediments,petroleums,coals etc…)contain,whatever their age and origin,sig-

关键词： GEOCHEMICAL EVOLUTION OF POLYTERPENES AND STEROIDS

High-resolution and instantaneous imaging of latent fingerprints

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Chinese Chemical Letters 2023年第4期34卷 1-2页

作者： Ming Cheng Juli Jiang Jean-Claude Chambron Leyong Wang Key Laboratory of Mesoscopic Chemistry of MOE Jiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Institut de Chimie de Strasbourg UMR 7177CNRSUniversitéde StrasbourgStrasbourg Cedex 67008France

Fingerprints can serve as an information storage platform for individuals and play an important role in forensic investigation and security[1].Most of them are invisible to the naked eye and are called latent fingerprints(LFPs).Conventional imaging techniques suffer from limitations like low resolution and sensitivity[2],restricting the recognition of LFPs to macroscopic features,such as shape,core,ending,bifurcation,island,pores,and so on,which correspond to levels 1 and *** of level 3 including ridges and their edges,are challenging to recognize.

关键词： latent resolution restrict

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Arylazopyrazole-functionalized photoswitchable octanuclear Zn(Ⅱ)-silsesquioxane nanocage

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Science China Chemistry 2021年第3期64卷 419-425页

作者： Kai Sheng Ya-Nan Liu Rakesh Kumar Gupta Mohamedally Kurmoo Di Sun School of Aeronautics Shandong Jiaotong UniversityJi'nan 250037China School of Chemistry and Chemical Engineering State Key Laboratory of Crystal MaterialsShandong UniversityJi'nan 250100China Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology School of Chemistry and Chemical Engineering厶iaocheng UniversityLiaocheng 252000China Institut de Chimie de Strasbourg Universite de StrasbourgCNRS-L/MR 71774 rue Blaise PascalStrasbourg Cedex 67008France

Photoswitchable organic materials have shown significant advancement for photonic applications,however,the polynuclear metal clusters conjugated with photoswitching properties are still ***,a novel octanuclear Zn(Ⅱ) nanocage{[Zn_(8)-(Me_(4)Si_(4)O_(8))_(2)(azopz)_(8)]·4CH_(2)Cl_(2)·MeOH·MeCN}(SD/Zn8)(Hazopz=3,5-dimethyl-4-(phenyldiazenyl)-1H-pyrazole),based on multidentate silsesquioxane and pyrazole modified by photoisomerizable azo group has been designed and synthesized to realize the reversible photoswitching behavior.X-ray crystallographic study reveals that the unique metal core consists of two annular Me_(4)Si_(4)O_(8)^(4-)sandwiching a ring of eight Zn atoms where the pyrazole end of azopz-bridges them *** azopz-ligands diverge above and below the plane defined by eight Zn ***,SD/Zn8 shows quick trans-to-cis transformation upon 365 nm light irradiation,which can be easily changed back by 450 nm light,but slow cis-to-trans reversibility at room temperature as confirmed by UV-V is and 1H NMR *** process,which presumably regulates the spaces,acts like a pump and is completely *** such,it can be considered as a molecular pump energized by ***,the molecule is an energy reservoir where it absorbs the light energy and releases it slowly with time.

关键词： silsesquioxane metal-organic nanocage photochromism X-ray single-crystal structure

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Carbonate-Water Supramolecule Trapped in Silver Nanoclusters Encapsulating Unprecedented Ag_(11) Kernel

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CCS Chemistry 2020年第1期2卷 663-672页

作者： Zhi Wang Hai-Feng Su Gui-Lin Zhuang Mohamedally Kurmoo Chen-Ho Tung Di Sun Lan-Sun Zheng Key Laboratory of Colloid and Interface Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringState Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100(China) State Key Laboratory for Physical Chemistry of Solid Surfaces and Department of Chemistry College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005(China) College of Chemical Engineering and Materials Science Zhejiang University of TechnologyHangzhou 310032(China) Institut de Chimie de Strasbourg Universitéde StrasbourgCNRS-UMR 717767008 Strasbourg Cedex(France)

In the absence of inorganic anion templates and in high pH condition(pH∼14),an unprecedented carbonate-hydrate supramolecule,[(CO_(3))_(2)(H_(2)O)]^(4−),trapped from atmospheric CO_(2),found to play an anion templating role to support the architecture of two related silver(Ag)nanoclusters(SD/Ag54a and SD/Ag55a),which are coprotected by the same organic ligands but differ by one silver atom of the metallic ***[(CO_(3))_(2)(H_(2)O)]^(4−)supramolecules are trapped into two Ag/tBuPhS/dppm pods,connected by a pair of face-shared silver pentagonal bipyramids(Ag_(11))into peanut-shaped silver ***,the equatorial Ag_(11) kernel represents a new embryonic ultrasmall silver nanocluster that is thought to follow a special facesharing growth fashion from pentagonal bipyramidal Ag7 subunit,which is also structurally elucidated in another new Ag44 nanocluster(SD/Ag44c)obtained in similar assembly system just changing tBuPhS−to iPrPhS−*** isolation of SD/Ag54a and SD/Ag55a were associated with:(1)supramolecule induction and(2)reductive and carbonate-rich assembly ***,this work brings a fresh perspective on the role of carbonate-water anion supramolecule in directing the assembly of silver ***,it realizes the control of reduction kinetics and kernel growth using multiple weak reductants and thiolate ***,it provides a possible face-shared growth route for ultrasmall silver nanoclusters.

关键词： silver nanocluster supramolecule anion-water cluster carbonate