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Substructure Prediction from Infrared Spectra by Using Support Vector Machines

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Chinese Chemical Letters 2005年第10期16卷 1354-1356页

作者： jun Hong liu min Chun LU Fu Sheng NIE Xiao Yu FENG Meng Long LI College of Chemistry Sichuan University Chengdu 610064

The potential of support vector machines （SVMs） for the substructure elucidation of infrared spectra have been investigated. The trained SVMs can identify the 16 substructures with high accuracy.

关键词： Infrared spectra substructures support vector machines.

Hybridization of covalent organic frameworks and photosensitive metal-organic rings:A new strategy for constructing supramolecular Z-scheme heterostructures for ultrahigh photocatalytic hydrogen evolution

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Aggregate 2024年第2期5卷 239-249页

作者： Xin-Ao Li Zi-Zhan Liang Ye-Cheng Zhou Jian-Feng Huang Xiao-Lin Wang Li-min Xiao jun-min liu The Key Laboratory of Low-Carbon Chemistry&Energy Conservation of Guangdong Province School of Materials Science and EngineeringSun Yat-sen UniversityGuangzhouChina School of Computer Science and Engineering Beihang UniversityBeijingChina

The rational design of Z-scheme heterojunction photosystems based on covalent organic frameworks(COFs)is a promising strategy for harnessing solar energy for hydrogen ***,a direct Z-scheme single-atom photocatalyst based on COF and metal-organic ring has been constructed through the supramolecular interactions of coral-like COF(S-COF)and photosensitized Pd2L2 type metal-organic ring(MAC-FA1).The MAC-FA1/S-COF heterojunction exhibits good light absorption,efficient charge separation and transfer,slow electron-hole recombination,and highly dispersed Pd active sites,enabling an efficient and stable H_(2) evolution *** optimized 4%MAC-FA1/S-COF achieves an H_(2) evolution rate of 100 mmol g^(−1)h^(−1)within 5 h and obtains a total accumulated turn-over number relative to Pd(TON_(Pd))of 437,685 within 20 h,far superior to S-COF,MAC-FA1,M-5/S-COF,Pd/S-COF,and M-5/Pd/S-COF,which is one of the highest records among COF-based photocatalysts for solar-driven H_(2)*** is the first work to incorporate photosensitized metal-organic rings/cages into porous crystalline COFs to form a supramolecular Z-scheme heterojunction,which has significant potential as a high-performance photocatalyst for solar-driven H_(2)production.

关键词： covalent organic framework metal-organic ring single-atom catalyst visible-light-driven H2 production Z-scheme heterojunction

One-step synthesis of inherently chiral p-tert-butylcalix[4]azacrown

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Chinese Chemical Letters 2009年第6期20卷 640-642页

作者： Shao Yong Li Bei Sun Zhi Chao Xiao ming Hui Huang Wei Xue Xie jun min liu College of Pharmacy lianjin Medical University Tianjin 300070 China School of Chemistry and Chemical Engineering Sun Yat-Sen University Guangzhou 510275 China

A one-step procedure is developed to synthesize inherently chiral p-tert-butylcalix[4]azacrown 1 through etherification between p-tert-butylcalix[4]arene and compound 3, which can be amplifed to efficiently prepare mo... 详细信息

关键词： Calixarene Inherently chiral One-step

CEO职业生涯关注与财务报告质量——来自中国上市公司的经验证据

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武汉大学学报（哲学社会科学版） 2017年第4期70卷 103-117页

作者：谢珺刘敏武汉大学经济与管理学院湖北武汉430072

以2003至2013年我国沪深A股上市公司为研究对象,分析CEO职业生涯关注与财务报告质量的关系,用CEO年龄、新上任哑变量和临退休哑变量作为职业生涯关注的代理变量进行研究,其实证结果表明:CEO职业生涯关注和上市公司的财务报告质量显著负... 详细信息

以2003至2013年我国沪深A股上市公司为研究对象,分析CEO职业生涯关注与财务报告质量的关系,用CEO年龄、新上任哑变量和临退休哑变量作为职业生涯关注的代理变量进行研究,其实证结果表明:CEO职业生涯关注和上市公司的财务报告质量显著负相关。进一步区分股权结构后发现,职业生涯关注对CEO行为的影响机制在不同股权性质企业中有所不同。该研究有助于进一步认识财务报告质量的影响因素,也丰富了CEO个人特征和公司决策的相关研究。

关键词： CEO职业生涯关注财务报告质量股权结构

Controlling the Molecular Weight and Molecular Weight Distribution using Compressed CO_2 Antisolvent

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Chinese Chemical Letters 2000年第10期11卷 933-934页

作者： jun liu, Zhi min liu, Bu Xing HAN, Jian WANG, Qing HUO, Fang Fang liu (Center For Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080 (Chemical Engineering College of Beijing United University, Beijing 100023) (Department of Chemical Engineering, University of Science and Technology of Hebei, Shijiazhuang 050018) Center for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China Chemical Engineering College Beijing United University Beijing 100023 China

Effect of CO2 dissolved in tetrahydrofuran (THF) on the polymerization of styrene in THF was studied at 333.2 K and different pressures. It was found that the molecular weight (MW) and MW distribution of the polystyre... 详细信息

关键词： CO_2 antisolvent styrene polymerization

Stereoselective [2+2] photodimerization within the Confined Space of a Ruthenium/Palladium Heterometallic Coordination Cage

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Stereoselective [2+2] photodimerization within the Confined ...

中国化学会第八届全国配位化学会议

作者： Jing Guo jun-min liu Cheng-Yong Su School of Chemistry and School of Materials Science and EngineeringSun Yat-Sen University

In recent decades, chemists have drawn inspiration from nature to design of supramolecular complex hosts that mimic the properties of enzymes.A heteronuclear self-assembled Ru-Pd cage has been developed as a new potential photochemical molecular device to unify multiple photosensitizing, electron relay and catalytic *** we report an example of stereoselectivephotocatalysis of the [2+2] photodimerization of olefins within self-assembled coordination *** supramolecular catalyst Pd-Ru MOC is capable of inducing [2+2] photodimerizationof acenaphthylene to give anti isomersin >80% yieldsat blue *** results indicate the Pd-Ru MOC not only serves as molecular flask to govern the host-guest interactions and control the stereoselectivephotodimerization, but also participates in the reactions as photoredoxactive nanoreactor byenergry transfer and/orelectron transfer methods.

关键词： MOCs Photocatalysis Photodimerization Olefins Stereoselective

Stereoselective [2+2] photodimerization within the Confined Space of a Ruthenium/Palladium Heterometallic Coordination Cage

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Stereoselective [2+2] photodimerization within the Confined ...

第十五届全国光化学学术讨论会

作者： Jing Guo jun-min liu Cheng-Yong Su School of Chemistry and School of Materials Science and Engineering Sun Yat-Sen University

In recent decades, chemists have drawn inspiration from nature to design of supramolecular complex hosts that mimic the properties of enzymes. A heteronuclear self-assembled Ru-Pd cage has been developed as a new potential photochemical molecular device to unify multiple photosensitizing, electron relay and catalytic units. Herein we report an example of stereoselective photocatalysis of the [2+2] photodimerization of olefins within self-assembled coordination *** supramolecular catalyst Pd-Ru MOC is capable of inducing [2+2] photodimerization of acenaphthylene to give anti isomers in >80% yields at blue LED. The results indicate the Pd-Ru MOC not only serves as molecular flask to govern the host-guest interactions and control the stereoselective photodimerization, but also participates in the reactions as photoredox active nanoreactor by energry transfer and/orelectron transfer methods.

关键词： MOCs Photocatalysis Photodimerization Olefins Stereoselective

Cavity-induced stereocontrol in photoredox catalysis within a chiral Ru（Ⅱ）-metalloligand-based palladium（Ⅱ） nanocages

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Cavity-induced stereocontrol in photoredox catalysis within ...

第七届全国物理无机化学学术会议

作者： Jing Guo jun-min liu Cheng-Yong Su School of Chemistry and Chemical Engineering Sun Yat-Sen University

＜正＞In recent decades,chemists have drawn inspiration from nature to design of supramolecular complex hosts that mimic the properties of *** one approach toward the catalytic activation of organic molecules that has also received much attention is visible light photoredox catalysis.1 The nanosized Pd-Ru heteronuclear metal-organic cages（MOCs）contain two enantiomeric forms:????????-cage（?-cage）

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Visible-light photoreduction of CO2 by a Re(Ⅰ) complex stabilized on HO-TPA/TiO2 organic-inorganic hybrid materials

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Visible-light photoreduction of CO2 by a Re(Ⅰ) complex stab...

2017全国光催化材料及创新应用学术研讨会

作者： Yi-Fan Chen jun-min liu Cheng-Yong Su School of Chemistry and School of Materials Science and Engineering Sun Yat-sen University

With increasing atmospheric CO concentration and energy crisis,converting CO efficiently to useful compounds has attracted much ***,it is a multiple-electron chemical process for CO reduction in artificial photosynthesis,which can lead to many *** and his coworkers reported a highly selective photoreduction of CO to CO by Re(I)complexes in *** then,versatile related Re(I)complexes have been extensively ***-sensitized TiO is a way to utilize the visible light region for water photolysis and CO *** dye molecule aggregation and detaching easily from TiO limit its ***,we exploit the sol-gel method to prepare organic-inorganic hybrid materials HO-TPA/TiO based on calixarene dyes and titamium *** then Re(I)complex(ReP)is immobilized on this hybrid materials to obtain the photocatalyst ReP@HO-TPA/TiO,which reveals outstanding performance in the photoreduction of CO to CO(TON = 569 mol/mol(Re)))under visible-light irradiation in the presence of an electron donor(BIH).

关键词： Hybrid material Photoreduction CO2 High performance Calixarene