检索结果-南通市图书馆

Effect of chenodeoxycholic acid (CDCA) additive on phenothiazine dyes sensitized photovoltaic performance

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2011年第4期54卷 699-706页

作者： LI Jing,WU WenJun,YANG JiaBao,TANG Jin,LONG YiTao & HUA JianLi Key Laboratory for Advanced Materials and Institute of fine chemicals East China University of Science & Technology,shanghai 200237,China Key Laboratory for Advanced Materials and Institute of fine chemicals East China University of Science & Technology Shanghai China

The effects of chenodeoxycholic acid (CDCA) in a dye solution as a co-adsorbent on the photovoltaic performance of dye-sensitized solar cells (DSSCs) based on two organic dyes containing phenothiazine and triarylamine segments (P1 and P2) were *** was found that the coadsorption of CDCA can hinder the formation of dye aggregates and improve electron injection yield and thus *** has also led to a rise in photovoltage,which is attributed to the decrease of charge *** DSSC based on dye P2 showed better photovoltaic performance than P1:a maximum monochromatic incident photon-to-current conversion efficiency (IPCE) of 89.5%,a short-circuit photocurrent density (Jsc) of 9.57 mA/cm2,an open-circuit photovoltage (Voc) of 697 mV,and a fill factor (FF) of 0.66,corresponding to an overall conversion efficiency of 4.42% under the standard global AM 1.5 solar light *** overall conversion efficiency was further improved to 5.31% (Jsc=10.36 mA/cm2,Voc=0.730 V,FF=0.70) upon addition of 10 mM CDCA to the dye solution for TiO2 *** impedance data indicate that the electron lifetime was improved by coadsorption of CDCA,accounting for the significant improvement of *** results suggest that interfacial engineering of the organic dye-sensitized TiO2 electrodes is important for highly efficient photovoltaic performance of the solar cell.

关键词： dye-sensitized solar cells phenothiazine additive co-adsorption

Synthesis of conjugated Aryleneethynylenesiloles Dendron

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2012年第12期30卷 2861-2868页

作者： Liu Jie Yan Chenxu Li Shanshan Wang Chengyun Shen Yongjia Key Laboratory for Advanced Materials and Institute of fine chemicals East China University of Science and Technology Shanghai 200237 China

Three routes were designed to synthesize a n-conjugated aryleneethynylenesiloles dendron. With the desilylation of the disilole mono（silylethynyl） derivative in the presence of potassium carbonate （K2co3）, the silole-containing oligomer has been successfully synthesized without impact on the Si-（CH3）2 group. The disilole mono- （silylethynyl） derivative was prepared by means of the Sonogashira heterocoupling reaction between the diacetylene compound and asymmetrical silole, catalyzed by the dichloro bis（triphenylphosphine）palladium, in a divergent synthesis. Due to their steric effect and triethynylbenzene self-coupling Glaser reaction, the endeavour to prepare the dendron by controlling the molar ratio of asymmetrical silole and 1,3,5-triethynylbenzene was failed. The another attempt to prepare the dendron by different desilylation condition of triisopropylsilyl group and trimethylsilyl group was also failed, the desilylation of Si-（CH3）2 group in silacyclopentadiene unit was also easily accomplished in the presence of tetrabutylammonium fluoride（Bu4NF）, whereas no reaction occurred when K2co3 was used instead of Bu4NF.

关键词： heterocycles dendrimers silole sonogashira reaction desilylation

co2-Triggered Metal Catalyst- and Solvent-free Aminochlorination of Methylenecyclopropanes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2011年第12期29卷 2739-2743页

作者：齐明辉邵黎雄施敏 Lab for Advanced Materials and Institute of fine chemicals East China University of Science ＆ Technology Shanghai 200237 China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China

Aminochlorination of methylenecyclopropanes （MCPs） 1 can be achieved under co2 atmosphere using N,N-dichlorotoluenesulfonamine （TsNCl2） as the nitrogen and halogen sources at room temperature to give the corresponding normal ring-remaining aminochlorinated products 2 along with/without the ring-opened aminochlorinated products 3 in moderate to good total yields. The present process takes the advantage of the green benign reaction conditions in the absence of any metal catalyst and solvent.

关键词： aminochlorination methylenecyclopropanes carbon dioxide

Effect of Free Radicals on Irradiation Chemistry of a Double-coordination Organotin(Sn_(4))Photoresist by Adjusting Alkyl Ligands

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CCS Chemistry 2024年第8期6卷 2044-2053页

作者： Hao Chen Yifeng Peng Haichao Fu Fuping Han Guangyue Shi Feng Luo Jun Zhao Danhong Zhou Pengzhong Chen Xiaojun Peng State Key Laboratory of fine chemicals Frontiers Science Center for Smart MaterialsSchool of Chemical EngineeringDalian University of TechnologyDalian 116024 Research and Development Center of Valiant co. Ltd.YEDAYantai 264006 School of Materials Science and Engineering Nankai UniversityTianjin 300350 shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201203 State Key Laboratory of fine chemicals College of Materials Science and EngineeringShenzhen UniversityShenzhen 518060

Metal oxide cluster(MOC)photoresists are highly promising materials for the next generation of extreme ultraviolet lithography(EUVL).The consecutive exploration of novel MOC materials and their structural irradiation chemistry are the major concerns associated with ***,we report two bicoordinated tin-oxo clusters(TOCs),the organic ligands of which contain both adamantane carboxylic acids and alkyl groups(methyl:Sn_(4)–Me–C10;butyl:Sn_(4)–Bu–C10).We explore the correlation between the structures of the TOCs and their patterning properties by adjusting the alkyl groups coordinated to the Sn *** structural variation causes different irradiation chemistry,with Sn_(4)–Me–C10 exhibiting improved resolution and Sn_(4)–Bu–C10 demonstrating higher *** differences are attributed to the bonding energies of the Sn-methyl and Sn-butyl groups,the size of the resulting alkyl radicals,and their reaction *** clusters occur in the reactions of Sn–C bond cleavage and the decarboxylation of adamantane carboxylic acids upon ***,the entire process exhibits distinct *** on the electron-beam lithography and other experiments,we proposed irradiationinduced reaction mechanisms for both *** Sn_(4)–Bu–C10 cluster predominantly undergoes alkane chain linkage,whereas the Sn_(4)–Me–C10 cluster mainly follows the adamantanes linkage pathway.

关键词： extreme ultraviolet photoresist tin-oxo clusters free radical alkyl ligand lithographic process semiconductor manufacturing

Magnetic separation of metal sulfides/oxides by Fe3O4 at room temperature and atmospheric pressure

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2019年第5期38卷 379-389页

作者： Jia-Hui Ji Yi-Fei Xiao Bin Shen Qiu-Ying Yi Jin-Long Zhang Ming-Yang Xing Key Laboratory for Advanced Materials and Institute of fine chemicals School of Chemistry and Molecular Engineering East China University of Science and Technology

The recovery of heterogeneous catalysts can save costs and avoid secondary pollution,but its separation efficiency and recovery cost are limited by conventional separation methods such as precipitation–flocculation,centrifugation and *** this paper,we found that surface-defective metal sulfides/oxides(WS2,CuS,ZnS,MoS2,CdS,TiO2,MoO2 and ZnO)commonly used in advanced oxidation processes(AOPs)could be magnetically recovered at room temperature and atmospheric pressure by mechanically mixing with *** potential,Raman,X-ray photoelectron spectroscopy(XPS)and electro-spin resonance(ESR)spectra were measured to explore the mechanism of the magnetic separation *** exposed active metal sites on the surface of defective metal sulfides/oxides are beneficial for the formation of chemical bonds,which are combined with electrostatic force to be responsible for the magnetic ***,other factors affecting the magnetic separation were also investigated,such as the addition of amount of Fe3O4,different solvents and particle ***,WS2 was chosen to be applied as a co-catalyst in Fenton reaction,which could be well separated by the magnetic Fe3O4 to achieve the recycle of catalyst in Fenton *** research provides a general strategy for the recycle of metal sulfides/oxides in the catalytic applications.

关键词： Magnetic separation Metal sulfides/oxides Recycle Fenton reaction

Optically probing molecular shuttling motion of[2]rotaxane by a conformation-adaptive fluorophore

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2022年第11期33卷 4904-4907页

作者： Chengyuan Yu Xiaodong Wang Cai-Xin Zhao Shun Yang Jiaan Gan Zhuo Wang Zhanqi Cao Da-Hui Qu Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research CenterFrontiers Science Center for Materiobiology and Dynamic ChemistryInstitute of Fine ChemicalsSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China shanghai Gantian Optical Material co. Ltd.Shanghai 201512China college of Science Henan Agricultural UniversityZhengzhou 450002China

A bistable[2]rotaxane with a conformation-adaptive macrocycle bearing a 9,14-diphenyl-9,14-dihydrodibenzo[a,c]phenazine(DPAC)unit was synthesized,which could be utilized to optical probe the molecular shuttling motion of the functionalized rotaxane *** UV-vis,^(1) H NMR and PL spectroscopic data clearly demonstrated that the DPAC ring was interlocked onto the thread and the fluorescence intensity of the DPAC unit in the macrocycle was effectively regulated by the location change of the macrocycle along the thread under acid/base stimulation,which was attributed to the modulation of the intramolecular photo-induced electron transfer between the DPAC unit and the methyltriazole(MTA)*** bistable rotaxane system containing a conformation-adaptive fluorophore unit in the macrocycle moiety opens an alternative way to design functional bistable mechanically interlocked molecules.

关键词： Rotaxane Optically probe Mechanical shuttling Molecular conformations conformation-adaptive macrocycle

Synthesis,characterization and reactivity of thiolate-bridged cobalt-iron and ruthenium-iron complexes

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2022年第1期33卷 217-220页

作者： Chao Guo Linan Su Dawei Yang Baomin Wang Jingping Qu State Key Laboratory of fine chemicals Dalian University of TechnologyDalian 116024China State Key Laboratory of Bioreactor Engineering Shanghai Collaborative Innovation Centre for BiomanufacturingFrontiers Science Center for Materiobiology and Dynamic ChemistryEast China University of Science and TechnologyShanghai 200237China

Thiolate-bridged hetero-bimetallic complexes[Cp^(*)M(MeCN)N_(2)S_(2)FeCl][PF_(6)](2,M=Ru;3,M=co,Cp^(*)=η^(5)-C_(5)Me_(5),N_(2)S_(2)=N,N'-dimethyl-3,6-diazanonane-1,8-dithiolate)were prepared by self-assembly of dimer[N_(2)S_(2)Fe]2 with mononuclear precursor[Cp^(*)Ru(MeCN)_(3)][PF_(6)]or[Cp^(*)co(MeCN)_(3)][PF_(6)]_(2)in the presence of CHCl_(3)as a chloride *** 2 and 3 exhibit obviously different redox behaviors investigated by cyclic voltammetry and spin density distributions supported by DFT ***,iron-cobalt complex 3 possesses versatile reactivities that cannot be achieved for complex *** the presence of coCp_(2),complex 3 can undergo one-electron reduction to generate a stable formally co^(II)Fe^(II)complex[Cp^(*)coN_(2)S_(2)FeCl](4).Besides,the terminal chloride on the iron center in 3 can be removed by dehalogenation agent AgPF_(6)or exchanged with azide to afford the corresponding complexes[Cp^(*)co(MeCN)N_(2)S_(2)Fe(MeCN)][PF_(6)]_(2)(5)and[Cp^(*)co(MeCN)N_(2)S_(2)Fe(N_(3))][PF_(6)](6).In addition,complexes 2,3 and 4 show distinct catalytic reactivity toward the disproportionation of hydrazine into *** results may be helpful to understand the vital role of the heterometal in some catalytic transformations promoted by heteromultinuclear complexes.

关键词： Metallic cooperativity Heterobinuclear complex Hydrazine disproportionation Metallothiolate ligand Metal-sulfur cluster

Tuning the coordination environment of single-atom catalyst M-N-C towards selective hydrogenation of functionalized nitroarenes

在线全文

学校读者我要写书评

暂无评论

Nano Research 2022年第1期15卷 519-527页

作者： Dan Zhou Leilei Zhang Xiaoyan Liu Haifeng Qi Qinggang Liu Ji Yang Yang Su Jingyuan Ma Jianzhong Yin Aiqin Wang School of Chemical Engineering State Key Laboratory of Fine ChemicalsDalian University of TechnologyDalian 116024China CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China shanghai Synchrotron Radiation Facility Zhangjiang Laboratory(SSRFZJLab)Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China

fine-tuning of the coordination environment of single-atom catalysts(SACs)is effective to optimize their catalytic performances,yet it remains challenging due to the vulnerability of ***,we report a new approach to engineering the coordination environment of M-N-C(M=Fe,co,and Ni)SACs by using glutamic acid as the N/C source and pyrolysis atmosphere as a *** with that in N2,NH3 was able to promote the doping of N at 7coordination number(CN)and the electronic structure were delicately *** was found that the electron density of Ni single atoms increased with the decrease of Ni-N *** a consequence,the capability of Ni-N-C to dissociate H2 was greatly enhanced and a higher catalytic activity in chemoselective hydrogenation of functionalized nitroarenes was ***,this modulation method could be applied to other transition metals including Fe and *** particular,the as-synthesized co-N-C SAC afforded a turnover frequency of 152.3 h~1 with 99%selectivity to 3-vinylaniline in the hydrogenation of 3-nitrostyrene,which was the highest ever reported thus far and was at least one order of magnitude more active than state-of-the-art noble-metal-free M-N-C catalysts,demonstrating the great potential of engineering the coordination environment of SACs.

关键词： single-atom catalysts coordination environment Ni-N-C chemoselective hydrogenation pyrolysis atmosphere

Baker's yeast mediated reduction of substituted acenaphthenequinones: Regio-and enantioselective preparation of mono-hydroxyacenaphthenones

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2007年第6期18卷 681-684页

作者： Xing Yong Wang, Jing Nan Cui, Wei Min Ren, Feng Li, Chun Liang Lu, Xu Hong Qian State Key Laboratory of fine chemicals, Dalian University of Technology, Dalian 116012, China School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou 221008, China shanghai Key Laboratory of Chemical Biology, East China University of Science and Technology, shanghai 200237, China State Key Laboratory of fine chemicals Dalian University of Technology Dalian 116012 China School of Chemical Engineering and Technology China University of Mining & Technology Xuzhou 221008 China shanghai Key Laboratory of Chemical Biology East China University of Science and Technology Shanghai 200237 China

Baker's yeast mediated reduction of acenaphthenequinone within 4-10 h afforded mono-hydroxyacenaphthenone mainly with low enantioselectivity, the substrate and mono-hydroxyacenaphthenone product almost converted to dihydroxyacenaphthene after 48 h. By control of the reaction time and in the presence of DMF as co-solvent, the reduction of 6-substituted acenaphthenequinones under vigorous agitation afforded the corresponding 2-hydroxyacenaphthenones in 24-84% yields with 10-93% ee.

关键词： Baker's yeast Reduction Regio- and enantioselectivity Chiral hydroxyacenaphthenone