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Electrochemistry and In-situ Spectroelectrochemistry Studies of Carbazole and 9-Ethylcarbazole

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Chinese Chemical Letters 2005年第12期16卷 1621-1624页

作者： Zi Pin ZHANG Bao Kang JIN yu peng tian Shi Jun WANG School of Chemistry and Chemical Engineering Anhui University Hefei 230039

Mechanisms of electron transfer of carbazole （CZ） and 9-ethylcarbazole （ECZ） were studied by electrochemistry and in-situ spectroelectrochemistry. The result indicated that the electrochemical reaction mechanism of ECZ was the same as that of CZ. Both of them undergo ECE process： the initial step is removal of one electron to generate very reactive cation radical, this species then proceeded by deprotonation-coupling reaction to form the corresponding dimer, which was oxidized continuously.

关键词： Carbazole in-situ spectroelectrochemistry cation radical

Two-photon Pumped Up-conversion Lasing Properties of A Series of Organic Salts with Different Side-chains

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Chinese Chemical Letters 2001年第7期12卷 631-634页

作者： yu peng tian Fu Ying HAO Jie Ying WU Qi FANG Min Hua JIANG Department of Chemistry Anhui UniversityHefei 230039 State Key Laboratory of Coordination Chemistry Nanjing University 210093 Institute of Crystal Materials Shandong Universityjinan 250100

The synthesis and upconverted fluorescent properties of a series of organic compounds with the structure: donor/bridge/acceptor, and different side-chains are reported. The results show that the compounds with different side-chains exhibit different two-photon induced fluorescent properties, although they have the same main donor/bridge/acceptor structure.

关键词： Two-photon upconverted fluorescence side chain

Synthesis and Photovoltaic Properties of Non-fullerene Solution Processable Small Molecule Acceptors

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Chemical Research in Chinese Universities 2013年第3期29卷 596-599页

作者： LI Hui LIU Zhao-yang ZHANG Xiao-yu YAO Shi-yu WEN Shan-peng tian Wen-jing State Key Laboratory of Supramolecular Structure and Materials Jilin University Changchun 130012 P. R. China

Two non-fullerene small molecules, BT-C6 and BT-C12, based on the vinylene-linked benzothiadiazole-thiophene（BT） moiety flanked with 2-（3,5,5-trimethylcyclohex-2-en-l-ylidene）malononitrile have been synthesized and characterized by solution/thin film UV-Vis absorption, photoluminescence（PL）, and cyclic voltammetry（CV） measurements. The two molecules show intense absorption bands in a wide range from 300 nm to 700 nm and low optical band- gaps for BT-C6（1.60 eV） and for BT-C12（1.67 eV）. The lowest unoccupied molecular orbital（LUMO） levels of both the molecules are relatively higher than that of [6,6]-phenyl C61 butyric acid methyl ester（PCBM）, promising high open circuit voltage（Voc） for photovoltaic application. Bulk heterojunction（BHJ） solar cells with poly（3-hexylthiophene）（P3HT） as the electron donor and the two molecules as the acceptors were fabricated. Under 100 mW/cm2 AM 1.5 G illumination, the devices based on P3HT：BT-C6（1：1, mass ratio） show a power conversion efficiency（PCE） of 0.67%, a short-circuit current（Jsc） of 1.63 mA/cm2, an open circuit voltage（Vow） of 0.74 V, and a fill factor（FF） of 0.56.

关键词： Non-fullerene small molecule Electron acceptor Bulk heterojunction

Floor heave mechanism for gob-side entry retaining with concrete blocks and control method:A case study

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Underground Space 2024年第2期15卷 244-259页

作者： Jiong Wang peng Liu Manchao He Guangyuan yu Huanzhi tian State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and Technology(Beijing)Beijing 100083China School of Mechanics and Civil Engineering China University of Mining and Technology(Beijing)Beijing 100083China College of Mining Engineering North China University of Science and TechnologyTangshan 063210China

The issue of significant floor heave deformation in gob-side entry retaining has long been a challenging problem in the context of longwall *** paper studies the floor heave failure mechanism and control method for gob-side entry retaining with concrete blocks in Guizhou Faer Coal Mine in *** on Rankine’s earth pressure theory,the effective shear stress equation for the plastic slip of roadway floor is *** deformation mechanism of floor heave in a retaining roadway with a block wall is revealed in this *** new comprehensive control method is proposed,encompassing roof pre-splitting blasting for pressure relief,reinforcing cables for roof control,double directions control bolts for concrete block,and pliability cushion yielding ***3D numerical calculation model is established,which shows that the new method can effectively reduce the average vertical stress peak value of the entity coal floor by 34.6%and significantly reduce the pressure source causing the roadway floor ***,a multi-parameter real-time online monitoring system for mine pressure was designed,and field tests were carried *** results show that the maximum value of roadway floor heave under the new method is 163 mm,reduced by 66.9%,and the roadway floor heave is effectively *** research findings offer a fresh perspective and new ideas for controlling floor heave in mining operations.

关键词： Gob-side entry retaining Floor heave mechanism Plastic slip Control methods Mine pressure monitoring

Expression of SOCS-1 in the liver tissues of chronic hepatitis B and its clinical significance

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World Journal of Gastroenterology 2008年第4期14卷 607-611页

作者： Zhi-Xin Zhao Qing-xian cai Xiao-Mou peng yu-tian Chong Zhi-Liang Gao Department of Infectious Diseases of The ThirdAffiliated Hospital of Sun Yat-Sen University Guangzhou 510630Guangdong Province China

AIM： To study the expression of suppressor of cytokine signaling-1 （SOCS-1） in the liver tissues of chronic hepatitis 13 （CHB） and the clinical significance of this expression. METHODS： The expression of SOCS-1 in liver tissues of 45 cases of CHB was investigated by immunohistochemical staining, and its correlations with inflammation grades and fibrosis stage were analyzed by SPSS statistics software. RESULTS： The result showed SOCS-1 expressing could be observed in the liver tissue of CriB. The expression of SOCS-1 was mainly distributed near the portal area in the liver tissue of mild inflammation CriB group, and was diffusely distributed in the liver tissue of moderate and severe inflammation groups. SOCS-1 positive stains mainly appear in the hepatocytes, only a few of liver interstitial cells were involved. Inside the hepatocyte, SOCS-1 positive stains are mainly distributed in the plasma. Some of the staining was observed on the membrane. The inclusion bodies in the plasma of hepatocytes were observed occasionally. There were both obvious correlations between the expression of SOCS-1 and the inflammatory grade, and that between the expression of SOCS-1 and the fibrosis stage, CONCLUSION： The distribution of SOCS-1 in the liver tissue of CriB is variable. This expression was correlated with the inflammation grade and fibrosis stage.

关键词： Suppressor of cytokine signaling-I, Janus kinase-signal transducer and activator of transcription Chronic hepatitis B Inflammation Fibrosis

Laser-induced damage threshold in HfO_2/SiO_2 multilayer films irradiated by β-ray

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Chinese Physics B 2019年第2期28卷 294-298页

作者： Mei-Hua Fang peng-yu tian Mao-Dong Zhu Hong-Ji Qi Tao Fei Jin-peng Lv Hui-Ping Liu College of Astronautics Nanjing University of Aeronautics&Astronautics Laboratory of Thin Film Optics Key Laboratory of Materials for High Power LaserShanghai Institute of Optics and Fine MachanicsChinese Academy of Sciences Institute of Modern Physics Chinese Academy of Sciences

Post-processing can effectively improve the resistance to laser damage in multilayer films used in a high power laser system. In this work, HfO_2/SiO_2 multilayer films are prepared by e-beam evaporation and then β-ray irradiation is employed as the post-processing method. The particle irradiation affects the laser induced damage threshold(LIDT),which includes defects, surface roughness, packing density and residual stress. The residual stress that is relaxed during irradiation changes from compressive stress into tensile stress. Our results indicate that appropriate tensile stress can improve LIDT remarkably. In view of the fact that LIDT rises from 8 J/cm^2 to 12 J/cm^2, i.e., 50% increase, after the film has been irradiated by 2.2×10^(13)/cm^2 β-ray, the particle irradiation can be used as a controllable and desirable postprocessing method to improve the resistance to laser induced damage.

关键词： β-ray irradiation HfO2/SiO2 multilayer film residual stress laser-induced damage threshold

A Novel Biferrocene Trinuclear Complex with Cis-Configuration

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Chinese Chemical Letters 1999年第3期10卷 251-254页

作者： Jie Ying WU yu peng tian Fu Xin XIE Shi Sheng NI(Department of Chemistry, Anhui University, Hefei 230039) Department of Chemistry Anhui University Hefei 230039 China

A novel biferocene trinuclear complex for Schiff base ligand S-methyl-N- (ferrocenyl-1-methyl -methylidene) dithiocarbazate thereafter abbreviated as HL) is described. X-ray diffraction studies established the structure of the palladium complex, PdL2. The geometry of Pd (II) in the complex is close to square planar and in novel cis-configuration with two ferrocene moieties on the same side. Degenerate four-wave mixing (DFWM) measurements show that the complex exhibit obvious nonlinear optical response.

关键词： palladium complex cis-configuration biferrocene third-order nonlinear optical property

Combined effects of ultrasonic vibration and FeCoNiCrCu coating on interfacial microstructure and mechanical properties of Al/Mg bimetal by compound casting

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China Foundry 2024年第5期21卷 588-598页

作者： yuan-cai Xu Wen-ming Jiang Qing-qing Li Ling-hui yu Xiao-peng yu Zi-tian Fan State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

In this work,a new treatment method combining ultrasonic vibration with FeCoNiCrCu high entropy alloy(HEA)coating was used to prepared Al/Mg bimetal through the lost foam compound *** effects of composite treatment involving ultrasonic vibration and HEA coating on interfacial microstructure and mechanical properties of Al/Mg bimetal were *** demonstrate that the interface thickness of the Al/Mg bimetal with composite treatment significantly decreases to only 26.99%of the thickness observed in the untreated Al/Mg *** HEA coating hinders the diffusion between Al and Mg,resulting the significant reduction in Al/Mg intermetallic compounds in the *** Al/Mg bimetal interface with composite treatment is composed of Al_(3)Mg_(2)and Mg_(2)Si/AlxFeCoNiCrCu+FeCoNiCrCu/δ-Mg+Al_(12)Mg_(17)eutectic *** interface resulting from the composite treatment has a lower hardness than that without *** acoustic cavitation and acoustic streaming effects generated by ultrasonic vibration promote the diffusion of Al elements within the HEA coating,resulting in a significant improvement in the metallurgical bonding quality on the Mg *** fracture position shifts from the Mg side of the Al/Mg bimetal only with HEA coating to the Al side with composite *** shear strength of the Al/Mg bimetal increases from 32.16 MPa without treatment to 63.44 MPa with ultrasonic vibration and HEA coating,increasing by 97.26%.

关键词： ultrasonic vibration FeCoNiCrCu HEA coating Al/Mg bimetal interfacial microstructure shear strength compound casting

A Weighted Flow related to a Trudinger–Moser Functional on Closed Riemann Surface

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Acta Mathematica Sinica,English Series 2024年第9期40卷 2244-2262页

作者： peng Xiu yu School of Mathematics Renmin University of ChinaBeijing 100872P.R.China

In this paper,with(Σ,g)being a closed Riemann surface,we analyze the possible concentration behavior of a heat flow related to the Trudinger–Moser *** obtain a long time existence for the *** along some sequence of times t_(k)→+∞,we can deduce the convergence of the flow in H2(Σ).Furthermore,the limit function is a critical point of the Trudinger–Moser functional under certain constraint.

关键词： Trudinger-Moser inequality global convergence heat flow