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FORMATION OF MESOPHASE MONO-DOMAINS AND MICRO-STRUCTURES IN THIN FILMS OF A SerIES OF COPOLYETHerS CONTAINING BOTH ODD-NUMBerED METHYLENE UNITS

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chinese Journal of polymer {2. 2001年第4期19卷 391-397页

作者： Feng-chao Xie Jie-ping Liu Dong-hang Yan Tian-bai He Ru-qing Zheng er-qiang chen state key laboratory of polymer physics and Chemistry, changchun institute of applied Chemistry, chinese academy of sciences, changchun 13002., china department of polymer science and engineering college of Chemistry peking university beijing 100871, china 中科院长春应用化学所高分子物理与化学国家重点实验室吉林长春北京大学北京

The structural and morphological evolution of mono-domains in thin films has been investigated for a series of liquid crystalline (LC) copolyethers. The copolyethers studied were synthesized by the reaction of 1-(4-hydroxy-4 ' -biphenylyl)-2.(4-hydroxyl-phenyl)propane (TPP) with 1,7-dibromoheptane and 1,11-undecane at different compositions (coTPPs-7/11). In contrast to the solution-cast thin films without annealing, which exhibit the isotropic homogeneous molecular orientation, mono-domains with a homeotropic alignment were found in coTPP-7/11(5/5) after the thin films were annealed in the high-temperature columnar phase (Phi '). Similar to the nucleation process in polymer crystallization, transmission electron microscopic observations show that small mono-domains appear in the initial stage of annealing, where molecules form a uniaxial in-plane chain orientation. With increasing annealing time, the molecular orientation gradually became tilted with respect to the substrate surface, and finally, a uniaxial homeotropic molecular orientation was achieved after a prolonged annealing time. The lateral size of mono-domains was found to increase continuously with annealing time and grew into a circular shape, indicating an isotropic lateral growth scheme which implies a hexagonal molecular packing proved by the electron diffraction experiments.

关键词： main-chain liquid crystalline polymer structure morphology

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Non-conjugated Polynorbornene Hosts with High Triplet Energy Levels for Solution-processed Narrowband Blue OLEDs

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Chemical Research in chinese Universities 2023年第5期39卷 763-771页

作者： LI qiang chen Liang WANG Xingdong WANG Shumeng SHAO Shiyang WANG Lixiang state key {2. of polymer physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022P.R.China School of applied Chemistry and engineering University of Science and Technology of ChinaHefei 230026P.R.China state key {2. of Marine Resource Utilization in South china Sea School of Materials Science and EngineeringHainan UniversityHaikou 570228P.R.China

Three polymer hosts(namely PNB-tBuCz,PNB-Ac,PNB-TAc)containing non-conjugated polynorbornene(PNB)backbone and hole-transporting arylamine segments(carbazole,acridan and dendritic teracridan)in side chains are developed for solution-processed narrowband blue organic light-emitting diodes(OLEDs).It is found that the non-conjugated polynorbornenes can keep high triplet energy(ET)levels in range of 3.12.3.2. eV by interrupting the conjugation of repeating units,making them capable as host materials for blue ***,by increasing the electron-donating capability of side chain arylamine from carbazole to acridan and dendritic teracridan,the highest occupied molecular orbital(HOMO)levels for the polymer hosts are elevated from-5.50 eV to-5.11 eV,beneficial for reducing the hole injection barrier from anode to emissive *** a result,solution-processed OLEDs employing polynorbornenes with dendritic teracridan side chain(PNB-TAc)as host and boron,selenium,nitrogen-containing multiple resonance thermally activated delayed fluorescence emitter as dopant reveal efficient narrowband blue electroluminescence with emission peak at 474 nm,full-width at half maximum of 30 nm,together with maximum external quantum efficiency of 2..2.,representing the state-of-the-art device efficiency for solution-processed OLEDs with narrowband blue emission.

关键词： polymer host Polynorbornene Organic light-emitting diode Solution-processed Narrowband Blue emission

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High-Efficiency Phosphorescent White Organic Light-Emitting Diodes with Stable Emission Spectrum Based on RGB Separately Monochromatic Emission Layers

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chinese physics Lett{2.s 2014年第4期31卷 122-125页

作者： ZHANG Zhi-qiang LIU Yi-Peng DAI Yan-Feng chen Jiang-Shan MA Dong-Ge ZHANG Hong-Mei state key {2. of polymer physics and Chemistry Changchun Institute of Applied Chemistry Chan~chun 130022 university of chinese academy of sciences Beijing 100049 department of Materials {2. and engineering Nanjing University of Posts and Telecommunications Nanjing 210023

Highly efficient phosphorescent white organic light-emitting diodes （WOLEDs） with stable emission spectra are successfully fabricated by using an RGB three-color separately monochromatic emission layer （EML） struc- ture. The EML consists of a sequence of bis（2.methyldibenzo[f, h]quinoxaline）（acetylacetonate） iridium （Ⅲ）（Ir（MDQ）2.acac）） doped tris（4-carbazoyl-9-ylphenyl）amine （TCTA） as the red emission layer, iridium, tris（2. phenylpyidine）（Ir（ppy）3） doped TCTA as the green emission layer and iridium（Ill） Ibis（4, 6-difuorophenyl）- pyridinato-N, C2.]picolinate （FIrpic） doped a mixed-host of TCTA and tris（4-carbazoyl-9-ylphenyl）amine （2.DCz PPy） as the blue emission layer. Without using any out-coupling techniques, the resulting WOLEDs achieve a power efficiency of 42.m/W at lOO cd/m2. and 34 lm/W at 1000 cd/m2. The WOLEDs also show excellent spec- trum stability with bias voltages, remaining the Commission Internationale de L＇Eclairage coordinates at （0.44, 0.43） from 1000 cd/m2.to 10000 cd/m2.and the color rendering index is as high as over 80. We contribute the sta- ble emission spectrum to the RGB separate EML structure that successfully suppresses the undesired competition between host-guest energy transfer and direct exciton formation on emissive dopants by effectively controlling the position of exciton recombination region.

关键词： Layers High-Efficiency red emission

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Ni-Catalyzed Cross Coupling ofAryl Grignard Reagents with Aryl Halides in a Nonpolar Solvent and an Efficient Synthesis of Biaryls Under Neat Conditions

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Chemical Research in chinese Universities 2016年第1期32卷 55-61页

作者： WU qiang JIN Rizhe KANG Chuanqing chen Wenhui BIAN Zheng MA Xiaoye DING Jinying GUO Haiquan QIU Xuepeng GAO Llanxun state key {2. of polymer physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P. R. China university of chinese academy of sciences Beo'ing 100864 P. R. China

This study details Ni-catalyzed cross coupling of aryl Grignard reagents with aryl halides in toluene, a nonpolar solvent with a high boiling point. The reaction was applied for the synthesis of various biaryls in good yields without the introduction of a large steric ligand. The Kumada-Tamao-Corriu（KTC） reaction in toluene was then successfully modified to proceed under neat conditions for the efficient syntheses of symmetrical biaryls, particularly in large-scale preparations. Unactivated aryl chlorides show higher reactivity than aryl bromides, particularly under neat conditions. Mechanistic investigations suggest a radical procedure for the catalytic cycle, and the origin of the radical intermediates being aryl halides.

关键词： Cross-coupling Nickel Biaryl Reaction mechanism Neat condition

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STUDIES ON THE NATURE OF THE MACROMOLECULAR CONDENSED state OF "NASCENT" ULTRA HIGH MOLAR MASS POLYETHYLENE

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chinese Journal of polymer {2. 2001年第1期19卷 25-31页

作者： Zhong-yong Fan qiang Lan Hai-shan Bu Li-heng Wu Lin Sun Ren-yuan Qian Shou-xi chen Yong-feng Men Bing-zheng Jiang department of Materials {2. Fudan UniversityShanghai 200433 china Textile 4cademy PO Box 651Beijing 100025 institute of Chemistry Chinese Academy of SciencesBeijing 100080 changchun institute of {2. Chemistry Chinese Academy of SciencesChangchun 130022 Faculty of physics University of Freiburg

Ultra high molar mass polyethylene(UHPE)powder as polymerized in a slurry process has been studied,in its nascent {2.,after recrystallization on rapid cooling from the melt and after hot compression molding to a film,by DSC,effect of annealing the recrystallized specimen at 12. similar to 130 degreesC,morphology by polarizing optical microscopy and small angle X-ray *** on the experimental results obtained the macromolecular condensed {2. of the nascent UHPE powder is a rare case of a multi-chain condensed {2. of non-interpenetrating chains,involving interlaced extended chain crystalline layers and relaxed parallel chain amorphous *** melting,a nematic rubbery {2. of nanometer size domain *** nematic-isotropic transition temperature was judged from literature data to be at least 2.0 degreesC,possibly higher than 300 ℃,the exact temperature is however not sue because of chain degradation at such high *** recrystallization process from the melt is a crystallization from a nematic rubbery *** drop of remelting peak temperature by 10 K of the specimen recrystallized from its melt as compared to the nascent {2. has its origin in the decrease both of the crystalline chain stem length and of the degree of *** remelting peak temperature could be returned close to that of the nascent {2. by annealing at 12.~130 ℃.

关键词： ultra high molar mass polyethylene recrystallization remelting annealing nematic state

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polymer Electro-optic Modulator Linear Bias Using the Thermo-optic Effect

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chinese physics Lett{2.s 2012年第1期29卷 152-155页

作者： SUN Xiao-qiang chen Chang-Ming LI Xiao-Dong WANG Xi-Bin YANG Tian-Fu ZHANG Da-Ming WANG Fei XIE Zhi-Yuan changchun institute of {2. Chemistry Chinese Academy of SciencesChangchun 130022 state key {2. on Integrated Optoelectronics Jilin UniversityChangchun 130012

A quasi-rectangular waveguide polymer MacH^(-)Zehnder (M-Z) electro-optic (EO) modulator based on an organic/inorganic hybrid material with thermal bias control is fabricated and *** bias for the modulator is obtained through thermo-optic *** optical output is adjusted by changing phase difference between the two arms of the M-Z interferometer.A power consumption of 16.1 m W for π phase change is observed owing to the application of silica *** approach is proved to be effective to suppress direct current drift in polymer EO modulators.

关键词： modulator interferometer waveguide

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Organic semiconductor heterojunctions: electrode-independent charge injectors for high-performance organic light-emitting diodes

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Light(science & Applications) 2016年第1期5卷 570-576页

作者： Yong-Hua chen Dong-Ge Ma Heng-Da Sun Jiang-Shan chen Qing-Xun Guo {2. Wang Yong-Biao Zhao state key {2. of polymer physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China department of Macromolecular science and {2. School of EngineeringCase Western Reserve UniversityClevelandOH 44106USA School of Materials science and {2. Shaanxi Normal UniversityXi’an 710062China Luminous Center of Excellence for Semiconductor Lighting and DisplaysSchool of Electrical and Electronic EngineeringNanyang Technological UniversitySingapore 639798Singapore

Organic light-emitting diodes(OLEDs)are driven by injected charges from an anode and a *** low and high work function metals are necessary for the effective injection of electrons and holes,***,we introduce a fully novel design concept using organic semiconductor heterojunctions(OSHJs)as the charge injectors for achieving highly efficient OLEDs,regardless of the work functions of the *** contrast to traditional injected charges from the electrodes,the injected charges originate from the *** device performance was shown to be significantly improved in efficiency and stability compared to conventional ***,the OLEDs based on OSHJs as charge injectors still exhibited an impressive performance when the low work function Al was replaced by air-and chemistry-stable high work function metals,such as Au,Ag,and Cu,as the cathode contact,which has been suggested to be difficult in conventional *** concept challenges the conventional design approach for the injection of charges and allows for the realization of practical applications of OLEDs with respect to high efficiency,selectable electrodes,and a long lifetime.

关键词： charge injection OLEDs organic semiconductor heterojunctions

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多形貌中空介孔SiO2.可控合成及复合物对Cu2.的吸附还原

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高等学校化学学报 2019年第11期40卷 2412-2418页

作者：张辰吴畅韩伟豪宫玉梅石强大连工业大学纺织与材料工程学院大连116034 中国科学院长春应用化学研究所高分子物理与化学国家重点实验室长春130022

以间苯二酚/甲醛(RF)树脂为软模板,正硅酸乙酯(TEOS)为硅源,十六烷基三甲基溴化铵(CTAB)为制孔剂,采用一锅溶胶-凝胶法制备了多形貌中空介孔二氧化硅微球(HMSM).通过改变甲醛用量调控软模板RF树脂的结构,可以获得一系列不同形貌及结构的... 详细信息

以间苯二酚/甲醛(RF)树脂为软模板,正硅酸乙酯(TEOS)为硅源,十六烷基三甲基溴化铵(CTAB)为制孔剂,采用一锅溶胶-凝胶法制备了多形貌中空介孔二氧化硅微球(HMSM).通过改变甲醛用量调控软模板RF树脂的结构,可以获得一系列不同形貌及结构的HMSM,随着甲醛用量的增加,HMSM结构表现为单层壳空心球、蛋黄壳空心球、双层壳空心球等结构.其中具有蛋黄壳空心球结构的HMSM比表面积可达691 m2.g,孔体积达2. 2.cm^3/g,孔径均匀(3. 5nm).以硝酸铈铵为引发剂,在具有蛋黄壳空心球结构的HMSM中引发丙烯腈自由基聚合,并将支链聚丙烯腈上的氰基偕胺肟化,制得HMSM接枝聚偕胺肟(HMSMg-PAO).以100 mg/L的CuCl2.液为目标溶液,在pH=4. 0时测试合成的HMSM-g-PAO对Cu^2.的吸附效果,发现吸附平衡时Cu^2.吸附量达134 mg/g.

关键词：中空介孔二氧化硅软模板聚偕胺肟 Cu2.吸附

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不同铁源制备磁性中空介孔硅铁复合微球及应用

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复合材料学报 2020年第5期37卷 1123-1129页

作者：韩伟豪宫玉梅张辰常琳琳赵彤瑶石强大连工业大学纺织与材料工程学院大连116034 中国科学院长春应用化学研究所高分子化学与物理国家重点实验室长春130022

采用一锅溶胶-凝胶法,以酚醛树脂为软模板、十六烷基三甲基溴化铵(CTAB)为制孔剂、四乙氧基硅烷(TEOS)为硅源,通过改变铁源制备了不同形貌的磁性中空介孔硅铁复合微球(FexOy/HMS),并考察了铁源在复合微球形成中的调控作用。利用XRD、SEM... 详细信息

采用一锅溶胶-凝胶法,以酚醛树脂为软模板、十六烷基三甲基溴化铵(CTAB)为制孔剂、四乙氧基硅烷(TEOS)为硅源,通过改变铁源制备了不同形貌的磁性中空介孔硅铁复合微球(FexOy/HMS),并考察了铁源在复合微球形成中的调控作用。利用XRD、SEM、TEM以及振动样品磁强计(VSM)分别对其晶型结构、形貌和磁性进行了表征和分析。结果表明,乙酰丙酮铁(Fe(acac)3)有助于复合微球壳层的形成,合成的复合微球更加光滑规整。对以Fe(acac)3为铁源合成的Fex Oy/HMS复合微球磁性化后进行接枝聚丙烯腈(PAN),并经聚偕胺肟(PAO)化制得FexOy/HMS接枝聚偕胺肟(FexOy/HMS-g-PAO)复合材料,其比饱和磁化强度达8.6 emu/g,可用于水中Cr(Ⅵ)的吸附与快速分离。以浓度为100 mg/L的K2.r2.7溶液为目标溶液,pH=2.平衡吸附量达12..75 mg/g。

关键词：溶胶-凝胶法中空介孔二氧化硅乙酰丙酮铁磁性复合微球铬吸附

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Multifunctional electrospinning composite fibers for orthotopic cancer treatment in vivo

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Nano Research 2015年第6期8卷 1917-1931页

作者： Yinyin chen Shi Liu Zhiyao Hou Pingan Ma Dongmei Yang Chunxia Li Jun Lin state key {2. of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130024 China university of the chinese academy of sciences Beijing 100049 China state key {2. of polymer physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130024 China

A multifunctional, dual-drug carrier platform was successfully constructed. Core-sheU structured NaGdF4：Yb/er@NaGdF4：Yb@mSiO2.polyethylene glycol （abbreviated as UCNPS） nanopartides loaded with the antiturnor drug, doxorubicin （DOX） were incorporated into poly（^-caprolactone）（PCL） and gelatin loaded with antiphlogistic drug, indomethacin （MC） to form nanofibrous fabrics （labeled as MC/UCNPS/DOX） via electrospinning process. The resultant multifunctional spinning pieces can be surgically implanted directly at the tumor site of mice as an orthotopic chemotherapy by controlled-release DOX from mesoporous silicon dioxide （SiO2. and upconversion fluorescence/magnetic resonance dual-model imaging through NaGdF4：Yb/er@NaGdF4：Yb embedded in MCfldCNPS/DOX invivo.

关键词： electrospinning orthotopic treatment controlled release multiple structure

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