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Characterization and Properties of a New Amorphous Small-molecule material Containing Both Donor and Acceptor Moieties for Photovoltaic Application

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Chemical Research in Chinese Universities 2013年第6期29卷 1193-1198页

作者： ZHAO Yang ZHANG Feng-ling ZHANG Ming ma yu-guang State Key Laboratory of Supramolecular Structure and materials Jilin University Changchun 130012 P.R.China Biomolecular and Organic Electronics Department of Physics Chemistry and BiologyLink(o)ping University Link(o)ping Sweden

A new amorphous small-molecule material, in which the electron-donating carbazole units are connected to the backbone by flexible side chains, has been synthesized and utilised in the photovoltaic（PV） field. This material exhibits the amorphous feature, higher thermal stability and good film forming ability. The influence of the heat-treatment on the morphology and the performance of PV devices were studied. Eventually, a relatively high photovoltaic conversion efficiency was achieved. At the same time, the PV device displayed an ideal open-circuit voltage（over 1 V） which is very close to the upper limit of its theoretical value.

关键词： Amorphous material Donor-acceptor bonding Photovoltaic device

Thermal and Optoelectronic Properties of Anthracene and Dibenz[a,c]Anthracene

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Chemical Research in Chinese Universities 2013年第1期29卷 110-115页

作者： MUDDASIR Hanif WANG Zhi-ming YANG Bing LU Ping ma yu-guang State Key Laboratory of Supramolecular Structure and materials Jilin University Changchun 130012 P. R. China School of Petrochemical Engineering Shenyang University of Technology Liaoyang 111003 P. R. China

The basic characteristics of anthracene（AN） and dibenz[a,c]anthracene（D[a,c]A） derivatives, important semiconductors, were systematically studied. Differential scanning calorimetry（DSC） shows that D[a,c]A has the reversibility of solid and liquid phases. Thermalgravimetric analysis（TGA） shows that D[a,c]A exhibits higher Td（decomposition temperature）, which indicates D[a,c]A, as active layers, should be more suitable to being made into stable devices. D[a,c]A shows blue-shifted UV-Vis absorption and emission despite increased conjugation compared to anthracene due to different symmetries. Both the compounds are planar and show weak blue fluorescence in the tetrahydrofuran（THF） solution and higher fluorescence in the solid-state, due to different energy levels in solution and solid-state, explained via Jablonski diagram.

关键词： Anthracene Dibenz[a,c]anthracene Molecular property Thermal Electrochemistry

Synthesis, Crystal Structure, Physical Properties, and Application of a Series of Functional Dibenzo[d,f][1,3]dioxepine Derivatives

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Chemical Research in Chinese Universities 2008年第6期24卷 798-804页

作者： ZHANG Hai-quan ZHANG Cheng-bo ZHENG Yan YANG Bing ma yu-guang State Key Laboratory of Metastable materials Science and Technology Yanshan University Qinhuangdao 066004 P. R. China State Key Lab for Supramolecular Structure and materials Jilin University Changchun 130012 P. R. China

The twisted aromatics, functional dibenzo[d,f][1,3]dioxepine derivatives were synthesized in high yields from reactions of 5,5＇-dibromo-2,2＇-biphenol with corresponding ketal or ketone compounds under acid catalysis. The structures of these compounds were characterized by ^1H NMR, elemental analysis, UV-Vis absorption spectrum and X-ray diffraction analysis. The conformation of O--C--O bridged biphenyl derivatives with varied substitute groups on 6,6＇-position was studied by X-ray crystallography and force-field simulation. The result of calculations by UNIVERSAL 1.02 force field in Cerius2 package（4.6） indicates that dibenzo[d,f][1,3]dioxepine derivatives show twisted conformations and the twisted angle between the phenyl rings is about 40°, which is accordant with the result from crystal structure determination, though the obtained angles in the crystal of dibenzo[d,f][1,3]dioxepine derivatives with the varied substitute groups on 6,6＇-position are shown to be slightly shifted to 40° owing to intermolecular interactions in crystal stacking. DSC studies exhibit that the substitute groups on 6,6＇-position can induce a large variation of endothermic peaks ranging from 80 to 135 ℃. The conjugated polymers based on dibenzo[d,f][1,3]dioxepine derivatives, which have ultraviolet emitting with a quantum efficiency of 10%, were obtained by Yamamoto coupling.

关键词： Dibenzo[d,f]dioxepine Twisted angle Crystal structure Twisted conformation Ultraviolet emission

Poly(meta-phenylene) Derivative with Rigid Twisted Biphenyl Units in Backbone:Synthesis,Structural Characterization,Photophysical Properties and Electroluminescence

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Chemical Research in Chinese Universities 2007年第6期23卷 720-725页

作者： ZHENG Yan YANG Bing ZHANG Hai-quan LU Ping SHEN Fang-zhong LIU Lin-lin XU Hai YANG guang-di ma yu-guang Key Lab for Supramolecular Structure and materials of Ministry of Education Jilin University Changchun 130012 P. R. China

A soluble poly（meta-phenylene） derivative with rigid twisted biphenyl unit was synthesized by the Yamamoto coupling reaction. The polymer is soluble in common organic solvents, and the number-average molecular weight is about 6500. The UV-Vis and quantum chemical calculation indicate that the different conformation segments named ＂conformers＂ exist in the polymer backbones; it was also further confirmed by the single crystal X-ray diffraction study of the dimeric model compound. The π-π^＊ transition of biphenyl segments of twisted and planar conformations made the polymer exhibit a strong absorption around 256 nm and a weak absorption at about 300 nm. Furthermore, the polymer exhibits a strong UV photoluminescence at 372 nm when the excitation wavelengths are longer than 300 run. The ultraviolet-emitting electroluminescence（EL） device with the single layer structure shows EL λmax of the derivative at 370 nm.

关键词： Poly(phenylene) Conformation UV light-emitting

Photoluminescence and Electroluminescence from Plasma Ploymerized Naphthalene Films

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Chinese Physics Letters 1996年第10期13卷 794-796页

作者： ZHANG Hai-feng ma yu-guang TIAN Wen-jing SHEN Jia-cong TANG Jian-guo LIU Shi-yong Key Laboratory of Molecular Spectra and Structures Jilin UniversityChangchun 130023 National Labaratory of Integrated Optical Electronics Jilin UniversityChangchun 130023

A polymer thin film electroluminescence (EL) device has been prepared by using plasma polymerization technique. Its basic structure consists of an emitting layer of plasma polymerized naphthalene (PPN) which is sandwiched between two metal electrodes. A uniform blue emission is observed under 8-20 V. Some electrical and optical properties of the device are described. The possible explanations for the blue EL from PPN are discussed.

关键词： technique. sandwich polymerization

Sintered Ore Sprayed by Acid and Alkaline Waste Water Resulted From Cold Rolling

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Journal of Iron and Steel Research International 2013年第3期20卷 36-38页

作者： YANG Da-zheng QI Dian-wei XU Peng-fei ZHANG Da-kui ma guang-yu LI Jing Technology Center of Angang Anshan Iron and Steel Co.Ltd. School of material and Metallurgy University of Science and Technology Liaoning

In order to prevent the powdering of a sintered ore from influencing the smooth operation of a blast furnace,the conventional way to deal with it is that the CaCl2 solution is prepared by tap water,and then the solution is sprayed onto the sintered ore for improving its RDI（low temperature reduction degradation index）.The CaCl2 solution prepared by adding acid and alkaline waste water resulted from cold rolling is sprayed onto the sintered ore to improve its *** values of RDI＋6.3 and RDI＋3.15 of the sintered ore which is sprayed by the CaCl2 solution with the CaCl2 concentration of 3.5%（mass percent） are increased by 17.5% and 11.63%,but the index of RDI-0.5 is decreased by 3.1% when the spraying amount of the solution is making up 0.5% of the total sintered ore sprayed in comparison with those of the sintered ore which is not sprayed by using the CaCl2 *** results show that after the CaCl2 solutions prepared by adding the acid and alkaline waste water are sprayed on the sintered ore,RDI of the ore can be remarkably improved and therefore another way for recycling acid and alkaline waste water can be available,by which both cost for treating waste water and cost for producing a sintered ore can be decreased and environment is free of pollution by harmful substances in the waste water.

关键词： waste water sintered ore low temperature reduction degradation index(RDI)

Mechanistic Aspects of Monomer, Polymer Formation, and Synthesis of PQ-Alt-Dialkyl-fluorene Conjugated Copolymer

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Chemical Research in Chinese Universities 2008年第1期24卷 110-115页

作者： Muddasir Hanif LU Ping ZHENG Yan LI mao XIE Zeng-qi ma yu-guang LI Di LI Jing-hong Key Lab for Supramolecular Structure and materials of Ministry of Education Jilin University Changchun 130012 P. R. China Department of Chemistry Tsinghua University Beijing 100084 P. R. China

Suzuki coupling reaction is widely used in the construction of conjugated polymers; however, there is still no report describing the mechanism and coupling of 9,10-phenanthrenequinone（PQ） building blocks via Suzuki reaction because PQ is sensitive to bases and light. Herein is reported the efficient Suzuki coupling of PQ with 9,10-dialkylfluorene with Na2CO3 as basic species and high molecular weight PQ-Alt-Dialkyl-Fluorene conjugated copolymer obtained in an yield of 42%. Based on the characterization data and well-accepted literature, we proposed a step-by-step mechanistic explanation for the formation of the PQ containing alternating conjugated copolymer.

关键词： 9,10-Phenanthrenequinone Rearrangement Mechanism Conjugated polymer

Newly elected Chinese Academy of Sciences academicians in chemistry division in 2021

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Aggregate 2021年第6期2卷 4-7页

作者： Chi, Lifeng Xian-He Bu Fang, yu Liu, maili ma, yu guang ma, guanghi Mei-Xiang Wang yu, Biao Su-yuan Xie yuan, Yingjin Zhou, Xiang Soochow Univ Suzhou Peoples R China Nankai Univ Sch Mat Sci & Engn Tianjin Peoples R China Shaanxi Normal Univ Xian Peoples R China Chinese Acad Sci Innovat Acad Precis Measurement Sci & Technol Wuhan Peoples R China South China Univ Technol Guangzhou Peoples R China Chinese Acad Sci State Key Lab Biochem Engn Inst Proc Engn Beijing Peoples R China Tsinghua Univ Dept Chem Beijing Peoples R China Chinese Acad Sci Shanghai Inst Organ Chem Shanghai Peoples R China Xiamen Univ Xiamen Peoples R China Tianjin Univ Sch Chem Engn & Technol Tianjin Peoples R China Wuhan Univ Wuhan Peoples R China

On November 18,2021,the Chinese Academy of Sciences(CAS)announced the names of newly elected *** to all the elected academicians!In this Profile column,we introduce 11 scientists in the Chemistry Division of the *** expertise covers organic chemistry,inorganic chemistry,physical chemistry,analytical chemistry,polymer chemistry and physics,biochemical engineering,and chemical biology.

关键词： chemistry inorganic academic

Influence of the Energy Level matching on the Performances of Organic/Polymeric Electroluminescent Devices

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Chinese Physics Letters 1996年第10期13卷 790-793页

作者： TIAN Wen-jing HUANG Jin-song WU Fang SUN Chang-qing LIU Xiao-dong ma yu-guang LIU Shi-yong SHEN Jia-cong Key Laboratory of Molecular Spectra and Structures Jilin UniversityChangchun 130023 National Laboratory of Integrated Optic Electronics Jilin UniversityChangchun 130023 Chemical Department Jilin UniversityChangchun 130023 Basic Medical College Norman Bethum University of medical ScienceChangchun 130023

The performances such as the operating-voltage and the brightness of three types of devices: single-layer device, double-layer device and three-layer device, were examined. It is demonstrated that the I-V characteristics of single-layer device depends not on the applied voltage but instead on the electric-field strength, and the brightness increased by a factor of 50 and the operating-voltage decreased when introducing one electron transporting layer or an electron transporting layer and one hole blocking layer between the light emitting layer and the negative electrode. In fact, it is imperative to match the energy level of each layer in the electroluminescent device in order to improve its comprehensive performances.

关键词： matching Electroluminescent layer