检索结果-南通市图书馆

维普期刊数据库

Ultrathin, Lightweight, and Flexible CNT Buckypaper Enhanced Using MXenes for Electromagnetic Interference Shielding

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2021年第4期13卷 208-220页

作者： Rongliang Yang Xuchun Gui Li Yao qingmei hu Leilei Yang Hao Zhang Yongtao Yao hui Mei Zikang Tang State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologySun Yat-Sen UniversityGuangzhou 510275People’s Republic of China Science and Technology on Thermostructural Composite Materials Laboratory School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072ShaanxiPeople’s Republic of China Instrumental Analysis and Research Center(IARC) Sun Yat-Sen UniversityGuangzhou 510275People’s Republic of China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150080People’s Republic of China Institute of Applied Physics and Materials Engineering University of MacaoTaipa 999078MacaoPeople’s Republic of China

Lightweight,flexibility,and low thickness are urgent requirements for next-generation high-performance electromagnetic interference(EMI)shielding materials for catering to the demand for smart and wearable electronic *** several efforts have focused on constructing porous and flexible conductive films or aerogels,few studies have achieved a balance in terms of density,thickness,flexibility,and EMI shielding effectiveness(SE).Herein,an ultrathin,lightweight,and flexible carbon nanotube(CNT)buckypaper enhanced using MXenes(Ti3C2Tx)for high-performance EMI shielding is synthesized through a facile electrophoretic deposition *** obtained Ti3C2Tx@CNT hybrid buckypaper exhibits an outstanding EMI SE of 60.5 dB in the X-band at 100μ*** hybrid buckypaper with an MXene content of 49.4 wt%exhibits an EMI SE of 50.4 dB in the X-band with a thickness of only 15μm,which is 105%higher than that of pristine CNT ***,an average specific SE value of 5.7×10^(4) dB cm^(2) g^(−1) is exhibited in the 5-μm hybrid ***,this assembly process proves promising for the construction of ultrathin,flexible,and high-performance EMI shielding films for application in electronic devices and wireless communications.

关键词： Carbon nanotube MXene Buckypaper Electromagnetic interference shielding

维普期刊数据库

Vertical graphene-coated Cu wire for enhanced tolerance to high current density in power transmission

在线全文

学校读者我要写书评

暂无评论

Nano Research 2022年第11期15卷 9727-9733页

作者： Kun Wang Shuting Cheng qingmei hu Feng Yu Yi Cheng Kewen huang Hao Yuan Jun Jiang Wenjuan Li Junliang Li Shichen Xu Jianbo Yin Yue Qi Zhongfan Liu Center for Nanochemistry(CNC) Beijing Science and Engineering Center for NanocarbonsBeijing National Laboratory for Molecular SciencesCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Beijing Graphene Institute(BGI) Beijing 100095China State Key Laboratory of Heavy Oil Processing College of ScienceChina University of PetroleumBeijing 102249China

Cu wires(CuWs)are widely used as electric transmission ***,their limited thermal and chemical stabilities become challenges under the high-power and harsh *** is regarded as an ideal protective barrier for CuW benefiting from its impermeability to all atoms and ***,the excellent hydrophobicity of vertical graphene(VG)will strengthen its protective capability as a corrosion and oxidation ***,VG is directly synthesized on CuW by plasmaenhanced chemical vapor deposition *** hydrophobic VG coating with a high water contact angle can effectively exclude the corrosive liquid and moisture from CuW surface and prevent their further ***,the electrochemical corrosion rate of VG-CuW is reduced by~13,8,and 2 times,compared with bare CuW,VG-CuW with hydrophilic treatment,and CuW coated with thick horizontal graphene layers,*** oxidation occurs on VGCuW after the long-time exposure to humid air at~200℃ along with the largely enhanced tolerance under high-current operating *** study reveals the impressive potentials of hydrophobic VG as a robust corrosion and oxidation barrier for metal wires used in high-power cables and electronic devices in harsh environment.

关键词： vertical graphene Cu wire oxidation and corrosion plasma-enhanced chemical vapor deposition

STUDIES ON SUBSTITUTION OF C=O IN BIS(μ-ALKYLTHIO)-HEXACARBONYLDI-IRONS----THE SYNTHESIS AND STRUCTURES OF(μ-RS)(μ-R'S)Fe2(CO)5Ph3

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 1986年第2期 32-37页

作者： Song Licheng,hu qingmei and Wang Jitao (Department of Chemistry,Nankai University)

Fourteen new PPh3 substituted Fe-S clusters,with general formula (μ-RS)(μ-R’S)Fe2(CO)5 PPh3,have been synthesized by reaction of unsymmetrical type of bis(μ-alkylthio ) hexacarbonyldiirons with *** on the discussi... 详细信息

关键词：叫口 STUDIES ON SUBSTITUTION OF C=O IN BIS HEXACARBONYLDI-IRONS STUDIES ON SUBSTITUTION OF C R’S)Fe2 THE SYNTHESIS AND STRUCTURES OF ALKYLTHIO 口甲 Fe RS

SYNTHESIS AND SPECTRAL STUDIES OF(μ-PHENYLTHIO) (μ-ALKYLTHIO) HEXACARBONYLDIIRON COMPLEXES

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chemical Journal of Chinese Universities 1985年第2期 55-62页

作者： Song Licheng,hu qingmei,Liu Xiangyang ana Wang Jicao (Department of Chemistry,Nankai University)

Through reductive reaction between PhL1 and μ-S2 Fe (CO/6,tollowed by nucleophilicsubstitution of the intermediate (μ-PhS} (μ-LIS} Fe2 (CO)6 toward RX,nine Fe-S clus-ter complexes of (μ-PhS)(μ-RS)Fe2(CO)6 series have been *** influence of RX structures on the activities in nucleophilic substitution has been examined and possible steroisomers and isomer ratios of the complexes *** addition,the regular variations of isomer’s CH3-S and CH2-S which are caused by the anisotropic effects of C-O and orientations of unshared electron pairs on sulfurs,have also been preliminarily discussed.

关键词： SYNTHESIS AND SPECTRAL STUDIES OF ALKYLTHIO HEXACARBONYLDIIRON COMPLEXES PHENYLTHIO OC Co

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

金属有机化合物中的绿色化学反应进展

有机化学 2001年第10期21卷 713-720页

作者：宋礼成范洪涛等南开大学化学系，天津300071

着重阐述了金属有机化学领域中所涉及的与绿色化学概念有关的一些化学反应，如水相反应、超临界流体及离子液体中的反应、固态反应、原子经济性及过渡金属催化的有机反应。

关键词：绿色化学金属有机反应金属有机化学水介质超临界流体水相反应离子液体

CRYSTAL AND MOLECULAR STRUCTURE OF （μ-SPh）（μ-SCH2CH2CN）Fe2 （CO）6

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

结构化学 1987年第3期 201-204页

作者： Wang Ruji Song Licheng Wang Hongen hu qingmei Nakai University, Tianjin

The crystal and molecular structure of (μ-SPh)(μ-SCH2CH2CN)Fe2-(CO)5 has been determined by X-ray diffraction method. The crystals of this complex are triclinic, space group P1,with a=ll.175(1), b=ll.877(2), c= 15.640(2)1,α=106.20(1),β=103.15(1),γ=98.46(1)°; Z=4; Dc=1.67g/cm3. The final structure refinement converged with unweighted and weighted R factors of 0.028 and 0.034 for 2853 observed unique reflections.

关键词： Fe SPh CRYSTAL AND MOLECULAR STRUCTURE OF SCH2CH2CN)Fe2 CN CO

Studies on Functionally Substituted n5-Cyclopentadienyl Transition-Metal Compounds --Synthesis and Crystal Structure of η5-CH3COC5H4W(CO)3CH2C5H5

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 1990年第1期6卷 14-19页

作者： Song Licheng , Yang hua and hu qingmei (Department of Chemistry, Nankai University, Tianjin)Zhou Zhongyuan (Chengdu Center of Analysis and. Determination, Academia Sinica, Chengdo)

Reaction of benzyl chloride with η5-CH3COC5H4W(CO)2Na formed in situ from η6-CH3CO C6H4Na and W(CO)2 gives η6-CH3COC6H4W(CO)*** single crystal structure of the product was determined by X-ray diffraction method. It crystallizes in the triclinlc space group P1 with unit cell parameters a= 10.199(5),b=12.116(7), c=14.207(6)A;a=69.47(5),β=72. 38(3),γ= 85.89(4);V= 1569. 9A3, Dc= 1.98 g/cm2; Z=4. Least-square refinement led to final R value of 0. 0539 and Rw value of 0. 0553, based on 3548 independent observed reflections.

关键词： η5-Acetylcyclopentadienyl 6-Benzyl tungsten compounds Synthesis Crystal structure

维普期刊数据库

STUDIES ON ADDITION OF （μ-ALKYLTHIO）-（μ-HALOMAGNESIUMTHIO）HEXACARBONY-DIIRON WITH α,β-UNSATURATED ORGANIC SUBSTRATES——SYNTHESIS AND CHARACTERIZATION OF β-FUNCTIONALLY SUBSTITUTED IRON-SULFUR COMPLEXES （μ-RS）-（μ-ZCH2CH2S）-Fe2（CO）6

在线全文

学校读者我要写书评

暂无评论

Science in China,Ser.B 1988年第4期31卷 393-400页

作者：宋礼成胡青眉单志兴王积涛 Department of Chemistry Nankai University Tianjin

Through addition of （μ-alkylthio）（μ-halomagnesiumthio）hexacarbonyldiiron, （μ-RS）（ν-XMgS）Fe2（CO）6,to α,β-unsaturated esters or nitrile, followed by alcoholysis of the intermediates in situ, eighteen β-func-tionally substituted iron-sulfur clusters （μ-RS）（μ-ZCH2CH2S）Fe2（CO）6 have been synthesized in high *** structures and conformers of thirteen new complexes have been confirmed by C/H analysis and thedata of IR and 1H NMR. This method, compared with a known Michael reaction procedure, has threeadvantages: starting materials are cheaper and easily available; manipulation is simple and yields of thecomplexes are quite high.

关键词： OCH Fe2 FUNCTIONALLY SUBSTITUTED IRON-SULFUR COMPLEXES HALOMAGNESIUMTHIO)HEXACARBONY-DIIRON WITH STUDIES ON ADDITION OF SYNTHESIS AND CHARACTERIZATION OF UNSATURATED ORGANIC SUBSTRATES ALKYLTHIO CO RS

Studies on Nucleophilic Ring-Opning Reaction of Ethylene Epoxide by (μ - CH,S )(μ-IMIgS ) Fea (CO)a——Syntheais and Crystal Structure of (μ-Methylthio)- (μ- R -Hydroxylethylthio)hexacarbonyldiiron

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chemical Journal of Chinese Universities 1988年第1期 38-44页

作者： Song Licheng, Wang Ruji, hu qingmei and Wang Honggen(Department of Chemistry and Testing Center, Nankai University,Tianjin)

A new type of Fe-S complex (C), (μ -CH3S) (μ-HOCH2CH2S) Fe2(CO)6which contains μ-β-hydroxyethyl, has been synthesized in high yield through ring-opening reaction of ethylene epoxide under uncleophilic attack of active complex (A), (μ-CH3S)(μ-IMgS) Fe2(CO)6, followed byan alcoholysis of the intermediate (B). The crystal structure of (C)was determined by an X-ray diffraction technique. The crystal belongs to monoclinic system with space group of C2/c. Cell parameters a= 15.784(3), b = 22.172(3), c=9.774(2)A, β=119.53(2)°, V=2976.3A. Dc = *** cm-3 , Z=8, F(000)=1616 and final R=0.077.

关键词： Syntheais and Crystal Structure of Methylthio CH,S CO)a Fea IMIgS Studies on Nucleophilic Ring-Opning Reaction of Ethylene Epoxide by