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Applications of functionalized ionic liquids

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Science china chemistry 2006年第5期49卷 385-401页

作者： LI Xuehui1, ZHAO Dongbin2,3. FEI Zhaofu2 & WANG Lefu1 1. Department of Chemical engineering, Guangdong Provincial laboratory of green Chemical Technology, South{3. Uni-versity of Technology, Guangzhou 510641,{3. 2. Swiss Federal Institute of Technology, Lausanne, EPFL, CH-1015 Lausanne, Switzerland 3. pku green chemistry center, beijing national laboratory for molecular sciences, college of chemistry and molecular engineering, peking university, beijing 100871,{3. 1. Department of Chemical engineering Guangdong Provincial Laboratory of Green Chemical Technology South China University of Technology Guangzhou 510641 China 2. Lausanne EPFL Swiss Federal Institute of Technology CH-1015 Lausanne Switzerland 3. pku green chemistry center Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular Engineering Peking University Beijing 100871 China

Recent developments of the synthesis and applications of functionalized ionic liquids (including dual-functionalized ionic liquids) have been highlighted in this review. Ionic liquids are at-tracting attention as alternative solvents in green chemistry, but as more functionalized ILs are pre-pared, a greater number of applications in increasingly diverse fields are found.

关键词： ionic liquids functionalized ionic liquids dual-functionallzed ionicliquids reaction media asymmetric synthesis nano-materials porous materials lubricants flue-gas desulfurization oil desul-furization

Luminescence resonance energy transfer based on β-NaYF_4:Yb,Er nanoparticles and TRITC dye

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Science china chemistry 2009年第10期52卷 1590-1595页

作者： SUN LingDong, GU JianQin, ZHANG ShuZhuo, ZHANG YaWen & YAN ChunHua beijing national laboratory for molecular sciences, State Key Lab of Rare Earth Materials chemistry and Applications & pku-HKU Joint Lab in Rare Earth Materials and Bioinorganic chemistry, college of chemistry and molecular engineering, peking university, beijing 100871, china 1. beijing national laboratory for molecular sciences State Key Lab of Rare Earth Materials Chemistry and Applications & PKU-HKU Joint Lab in Rare Earth Materials and Bioinorganic Chemistry College of Chemistry and Molecular Engineering Peking University Beijing 100871 China

β-NaYF4:Yb,Er nanoparticles (NPs) are one of the most efficient upconversion materials, which can convert near-infrared light to higher-energy light through multiple photon absorptions or energy transfer. In addition, they may be attractive alternative donors for luminescence resonance energy transfer (LRET) studies, because of their sharp absorption and emission profiles, high quantum yields, large anti-stokes shifts, long lifetime, low toxicity, and superior photo-stability. In principle, many problems of fluorescence resonance energy transfer (FRET), such as excitation of acceptors, emission overlaps between donors and acceptors, high background noise, potential toxicity, and instability, can be overcome using β-NaYF4:Yb,Er NPs as energy donors. Because the organic coating induced separation can significantly reduce the energy transfer efficiency and aqueous FRET system is difficult to be applied in devices, we demonstrate a novel NP-dye LRET system in solid state. The emission of the β-NaYF4:Yb,Er NPs at 53. nm overlaps with the absorption of the tetrametrylrhodarnine isothiocyante (TRITC), satisfying the requirement of LRET process. Since TRITC molecules are adsorbed on the β-NaYF4:Yb,Er NPs by an electrostatic interaction, the interaction distance is suitable for LRET without any further modulation. The resultant solid LRET system is ready for the further applications for devices.

关键词： upconversion emission β-NaYF4:Yb Er nanoparticles TRITC assembly luminescence resonance energy transfer (LRET)

Fe-Catalyzed Cross-Coupling of Aryl and Vinyl Carboxylates with Grignard Reagents under Mild Conditions

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Fe-Catalyzed Cross-Coupling of Aryl and Vinyl Carboxylates w...

第十六届全国金属有机化学学术讨论会

作者： Bi-Jie Li,Li Xu,and Zhang-Jie Shi~* beijing national laboratory of {3. sciences(BNLMS) and Key laboratory of Bioorganic chemistry and {3. engineering of Ministry of Education,college of chemistry and green chemistry {{13.,peking university,beijing 100080,china

＜正＞Previously,we have reported the nickel-catalyzed cross-coupling of aryl carboxylates with aryl boron and aryl zinc reagents,a class of novel transformation based on the C（aryl）-O bond *** reported herein an iron-catalyzed cross-coupling of aryl and vinyl carboxylates with Grignard reagents which proceeded with lower

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C-H Functionalization via Transition Metal Catalyzation

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C-H Functionalization via Transition Metal Catalyzation

中国化学会第二十五届学术年会

作者： Xiaobing Wan, Zhongxun Ma, Zhangjie Shi* beijing national laboratory for molecular sciences (BNLMS) and The Key laboratory of Bioorganic chemistry and {3. engineering of Ministry of Education, college of chemistry and green chemistry center, peking university, beijing 100871, china and State Key laboratory of Organometallic chemistry, Chinese Academy of sciences, Shanghai 20003., china

LiCl-Promoted Pd（Ⅱ）-Catalyzed ortho Carbonylation of N,N-Dimethylbenzylamines

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LiCl-Promoted Pd（Ⅱ）-Catalyzed ortho Carbonylation of N,N-...

第十六届全国金属有机化学学术讨论会

作者： Hu Li,~1 Gui-Xin Cai,~1 Zhang-Jie Shi~(*1,2) 1 beijing national laboratory of {3. sciences(BNLMS),pku green chemistry center and Key laboratory of Bioorganic chemistry and {3. engineering of Ministry of Education,{{13. of chemistry, peking university,beijing 100871,china 2 State Key laboratory of Organometallic chemistry,Chinese Academy of sciences,Shanghai 20003.,china

＜正＞Palladium-catalyzed highly regioselective carbonylation of substituted N,N-dimethylbenzylamines was developed with the assistance of *** ortho-functionalized N,N-dimethylbenzylamine was further transformed into ...

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New Strategy to Construct Fused/Bridged/Spiro Carbocyclic Scaffolds Based on the Design of Novel 6-C Synthon Precursor

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New Strategy to Construct Fused/Bridged/Spiro Carbocyclic Sc...

第十六届全国金属有机化学学术讨论会

作者： Jia Liu,~(1,2) Xi Wang,~1 Chang-Liang Sun,~1 Bi-Jie Li,~1 Min Wang,~2 Zhang-Jie Shi~(*1,3. 1 beijing national laboratory of {3. sciences(BNLMS) and Key laboratory of Bioorganic chemistry and {3. engineering of Ministry of Education,college of chemistry and {3. engineering and {{13. chemistry center,peking university,beijing 100871 and Department of chemistry,2 university of Agriculture of china,beijing 100094 and 3.State Key laboratory of Organometallic chemistry,Shanghai Institute of Organic chemistry,Chinese Academy of sciences,Shanghai 20003.,china

＜正＞Fused/bridged/spiro carbocyclic ring scaffolds are one of most important motifs in natural and synthetic organic *** design a new 6-C synthon,which could be applied to construct complex poly-,spiro-and bridged systems through the simple sequential chemical transformations from acyclic precursor by a one-pot strategy from

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Cloning and characterization of a vasa gene from the green mud crab Scylla paramamosain and its expression during gonadal development and gametogenesis

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Cloning and characterization of a vasa gene from the green m...

中国生理学会第23.全国会员代表大会暨生理学学术大会

作者： Yi-Lei WANG~1,Yu-Dong CHEN~1,Zhi-HuaZOU~1,Zi-PingZHANG~2 1 The Key laboratory of Science and Technology for Aquaculture and Food Safety,Fisheries college,Jimei university,Xiamen 3.1021,{3. 2 Department of chemistry and Biochemistry,Texas State university,San Marcos TX 78666,USA

＜正＞VASA is an important member of DEAD-box family,and it is one of the important regulatory factors which determine the development of reproductive *** order to gain a better understanding of the function of vasa gene in Scylla paramamosain（Sp-vasa） during gonadal development and gametogenesis,a full-length（2 851 bp） Sp-vasa encoding 63. amino acids with an estimated molecular weight of 68.756 kDa of Sp-vasa was cloned. DEAD family proteins have nine conserved regions including AQTGSGKT（I）,PTRELA（Ia）,TPGRI（Ib）,DEAD （II）,SAT（III）,LVFVE（IV）,RGLD（V）,HRIGRTGR（VI） and xYxxPTPVQ（Q）.In Sp-vasa,seven of the nine regions are conserved exactly,while two regions contain modifications:TPGRI becomes TPGKL and xYxxPTPVQ becomes ***-quantitative PCR and quantitative real-time PCR showed that Sp-vasa was specifically expressed in testis and ovary,like vasa genes previously reported in other ***,the gonad maturation was staged by GSI（gonadosomatic index）,and the expression level of Sp-vasa in the growth stage of ovaries was higher than in the maturation stage of ovaries as well as in the *** in situ hybridization,during oogenesis Sp-vasa mRNA were detected in the large part of oocytes in stage I,nucleus zone in stage III and perinuclear zone in stage ***,in stage I and III,the signals of Sp-vasa were significantly higher than in stage *** spermatogenesis,the hybridization intensity of Sp-vasa gene gradually increased from spermatogonia to spermatids, however,no hybridization signal was detected in *** differences of Sp-vasa mRNA expression in the different stages in gonadal development and gametogenesis suggest that Sp-vasa gene plays an important role in the reproductive process.

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The First Principle Study on the Rectification of molecular Junctions Based on the Alkyl-chain-modified Phenyl Benzothiophene Derivative

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Chinese Journal of Structural chemistry 2018年第7期37卷 1037-1044页

作者： Fuzhou 3.0007 china） college of chemistry and Materials Science Fujian Normal University college of Electronics and Information Science Fujian Jiangxia University State Key laboratory of Structural chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences

Using density functional theory（DFT） combined with nonequilibrium green＇s function investigates the electron-transport properties of several molecular junctions based on the PBTDT-CH=NH molecule, which is modified by one to four alkyl groups forming PBTDT-（CH2）nCH=NH. The electronic structures of the isolated molecules（thiol-ended PBTDT-（CH2）nCH=N） have been investigated before the electron-transport calculations are performed. The asymmetric current-voltage characteristics have been obtained for the molecular junctions. Rectifying performance of Au/S-PBTDT-CH=N-S/Au molecular junction can be regulated by introducing alkyl chain. The N3.molecular junction exhibits the best rectifying effect. Its maximum rectifying ratio is 878, which is 80 times more than that of the molecular junction based on the original N molecular junction. The current-voltage（I-V） curves of all the sandwich systems in this work are illustrated by transmission spectra and molecular projection density analysis.

关键词： the first principle phenyl benzothiophene alkyl chain rectification

Microwave absorption of aluminum/hydrogen treated titanium dioxide nanoparticles

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Journal of Materiomics 2019年第1期5卷 133-146页

作者： Michael green Peng Xiang Zhanqiang Liu James Murowchick Xinyu Tan Fuqiang Huang Xiaobo Chen Department of chemistry University of MissourieKansas CityKansas CityMO64110USA college of Materials and Chemical engineering Hubei Provincial Collaborative Innovation Center for New Energy MicrogridChina Three Gorges UniversityYichang443002China State Key laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai200050China Department of Geosciences University of MissourieKansas CityKansas CityMO64110USA State Key laboratory of Rare Earth Materials chemistry and Applications College of Chemistry and Molecular EngineeringPeking UniversityBeijing100871China

Interactions between incident electromagnetic energy and matter are of critical importance for numerous civil and military applications such as photocatalysis,solar cells,optics,radar detection,communications,information processing and transport et *** mechanisms for such interactions in the microwave frequency mainly rely on dipole rotations and magnetic domain *** this study,we present the first report of the microwave absorption of Al/H2 treated TiO_(2) nanoparticles,where the A_(l)/H_(2) treatment not only induces structural and optical property changes,but also largely improves the microwave absorption performance of TiO_(2) ***,the frequency of the microwave absorption can be finely controlled with the treatment temperature,and the absorption efficiency can reach optimal values with a careful temperature tuning.A large reflection loss of58.02 dB has been demonstrated with 3.1mm TiO_(2) coating when the treating temperature is 700℃.The high efficiency of microwave absorption is most likely linked to the disordering-induced property changes in the *** with the increased microwave absorption properties are largely increased visiblelight and IR absorptions,and enhanced electrical conductivity and reduced skin-depth,which is likely related to the interfacial defects within the TiO_(2) nanoparticles caused by the Al/H2 treatment.

关键词： Microwave absorption Black TiO_(2)nanoparticles Hydrogenation Aluminum reduction