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第八届高分子化学国际学术研讨会

作者： Qingyi Lu Haijun Niu Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education Department of Macromolecular Science and Engineering School of Chemistry and Chemical Engineering Heilongjiang University

We reported that a series of novel D–A conjugated polymers based on isoindigo were synthesis and *** novel electrochromic materials,their optical,electrochemical have been *** voltammograms(CV)of the polymer films on the indium–tin oxide(ITO)coated glass substrate exhibited two pairs of obvious redox peaks in the range of 0.76 V-1.65 V with strong color changes in

关键词： DONOR-ACCEPTOR CONJUGATED POLYMER BASED ON ISOINDIGO WITH STRONG FLUORESCENCE FOR ELECTROCHROMIC EXPLOSIVE DETECTION AND PHOTODETECTOR MEMORY

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MULTIFUNCTIONAL CONJUGATED POLYMERS CONTAINING NOVEL TRIARYLAMINE AND FLUORENE UNITS WITH ELECTROCHROMIC, ELECTROFLUOROCHROMIC PHOTOELECTRON CONVERSION AND MEMORY PROPERTIES

MULTIFUNCTIONAL CONJUGATED POLYMERS CONTAINING NOVEL TRIARYL...

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第八届高分子化学国际学术研讨会

作者： Caiyu Yang Haijun Niu Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education Department of Macromolecular Science and Engineering School of Chemistry and Chemical EngineeringHeilongjiang University

Three kinds of novel conjugated polymers containing novel triarylamine and fluorene units were synthesized via the Suzuki coupling reaction from dibromo monomers with9,9-dioctylfluorene-2,7-diboronic acid bis(pinacol)*** polymers showed excellent thermal stability associated with the 5%decomposition temperature up to 450°C in N2 *** the electrochemical reoxidation process,the color of the polymer films showed strong color changes from

关键词： ELECTROFLUOROCHROMIC PHOTOELECTRON CONVERSION AND MEMORY PROPERTIES MULTIFUNCTIONAL CONJUGATED POLYMERS CONTAINING NOVEL TRIARYLAMINE AND FLUORENE UNITS WITH ELECTROCHROMIC

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APPLICATION OF BLOCK COMPOUNDS CONTAINING DPP STRUCTURAL UNITS IN ELECTROCHROMISM AND PHOTOELECTRIC RESPONSE

APPLICATION OF BLOCK COMPOUNDS CONTAINING DPP STRUCTURAL UNI...

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第八届高分子化学国际学术研讨会

作者： Ye Chen Haijun Niu Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education Department of Macromolecular Science and Engineering School of Chemistry and Chemical EngineeringHeilongjiang University

In the course of our study,we devoted ourselves to the research and development of the synthesis and properties of acceptor block conjugated *** main novel block polymer materials have electrochromic properties,optical properties and memory *** cyclic voltammograms(CV)of the polymer films measured in the three-electrode system exhibited two distinct redox peaks in the range of 0.74-1.23 V with significant color *** the near-infrared region,the polymer color has a

关键词： DPP APPLICATION OF BLOCK COMPOUNDS CONTAINING DPP STRUCTURAL UNITS IN ELECTROCHROMISM AND PHOTOELECTRIC RESPONSE

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Localized Enzymatic Degradation of Polymers: Physics and Scaling Laws

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Physical Review Applied 2018年第3期9卷 031001-031001页

作者： Shankar Lalitha Sridhar Franck Vernerey Department of Mechanical Engineering University of Colorado Boulder Boulder 80309 CO United States Material Science and Engineering Program University of Colorado Boulder Boulder 80309 CO United States

Biodegradable polymers are naturally abundant in living matter and have led to great advances in controlling environmental pollution due to synthetic polymer products, harnessing renewable energy from biofuels, and in the field of biomedicine. One of the most prevalent mechanisms of biodegradation involves enzyme-catalyzed depolymerization by biological agents. Despite numerous studies dedicated to understanding polymer biodegradation in different environments, a simple model that predicts the macroscopic behavior (mass and structural loss) in terms of microphysical processes (enzyme transport and reaction) is lacking. An interesting phenomenon occurs when an enzyme source (released by a biological agent) attacks a tight polymer mesh that restricts free diffusion. A fuzzy interface separating the intact and fully degraded polymer propagates away from the source and into the polymer as the enzymes diffuse and react in time. Understanding the characteristics of this interface will provide crucial insight into the biodegradation process and potential ways to precisely control it. In this work, we present a centrosymmetric model of biodegradation by characterizing the moving fuzzy interface in terms of its speed and width. The model predicts that the characteristics of this interface are governed by two time scales, namely the polymer degradation and enzyme transport times, which in turn depend on four main polymer and enzyme properties. A key finding of this work is simple scaling laws that can be used to guide biodegradation of polymers in different applications.

关键词： Chemical kinetics, dynamics & catalysis Polymer behavior Tissue engineering Enzymes Front propagation Hydrogels Polymer gels Reaction diffusion systems

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Revealing the Side-Chain-Dependent Ordering Transition of Highly Crystalline Double-Cable Conjugated Polymers

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Angewandte Chemie 2021年第48期133卷

作者： Guitao Feng Wenliang Tan Safakath Karuthedath Cheng Li Xuechen Jiao Amelia C. Y. Liu Hariprasad Venugopal Zheng Tang Long Ye Frédéric Laquai Christopher R. McNeill Weiwei Li Beijing Advanced Innovation Center for Soft Matter Science and Engineering & State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology Beijing 100029 China Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China Department of Materials Science and Engineering Monash University Wellington Road Clayton Victoria 3800 Australia King Abdullah University of Science and Technology (KAUST) KAUST Solar Center (KSC) Physical Sciences and Engineering Division (PSE) Material Science and Engineering Program (MSE) Thuwal 23955-6900 Kingdom of Saudi Arabia School of Physics and Astronomy Monash University Wellington Road Clayton Victoria 3800 Australia Ramaciotti Centre for Cryo-Electron Microscopy Monash University Clayton Victoria 3800 Australia Center for Advanced Low-dimension Materials College of Materials Science and Engineering Donghua University Shanghai 201620 P. R. China School of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic Science Tianjin University Tianjin 300350 P. R. China

We developed a series of highly crystalline double-cable conjugated polymers for application in single-component organic solar cells (SCOSCs). These polymers contain conjugated backbones as electron donor and pendant perylene bisimide units (PBIs) as electron acceptor. PBIs are connected to the backbone via alkyl units varying from hexyl (C 6 H 12 ) to eicosyl (C 20 H 40 ) as flexible linkers. For double-cable polymers with short linkers, the PBIs tend to stack in a head-to-head fashion, resulting in large d -spacings (e.g. 64 Å for the polymer P12 with C 12 H 24 linker) along the lamellar stacking direction. When the length of the linker groups is longer than a certain length, the PBIs instead adopt a more ordered packing likely via H -aggregation, resulting in short d -spacings (e.g. 50 Å for the polymer P16 with C 16 H 32 linker). This work highlights the importance of linker length on the molecular packing of the acceptor units and the influences on the photovoltaic performance of SCOSCs.

关键词： cryo-transmission electron microscopy double-cable conjugated polymers lamellar stacking single-component organic solar cells

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Anti-Reflective Coating for Flexible Devices Using Plasma Enhanced Chemical Vapor Deposition Technique 23

Anti-Reflective Coating for Flexible Devices Using Plasma En...

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23rd International Conference on Optical MEMS and Nanophotonics, OMN 2018

作者： Monne, Mahmuda Akter Zaid, Almusaied Mia, Dalim Khanal, Jagadish Zakhidov, Alexender Chen, Maggie Yihong Material Science Engineering and Commercialization Program Texas State University San MarcosTX United States Ingram School of Engineering Texas State University San MarcosTX United States Department of Physics Texas State University San MarcosTX United States

ISBN: (纸本)9781509063727

In this work, high performance anti-reflective coating (ARC) is achieved using plasma enhanced chemical vapor deposition (PECVD) on the flexible substrate at 100°C, which is the lowest growth temperature reported so far. PECVD is used to deposit double-layer ARC (DLARC) of SiOx and SiNx (wavelengths between 600 nm and 700 nm) on nylon-6. Optical parameters of different deposited layers are controlled by varying gas flow ratio, growth temperature, and chamber pressure. It has been observed that the bare nylon-6 has a reflection of about 4% itself, and with the DLARC the reflection of light is reduced by about 50%. © 2018 IEEE.

关键词： Refractive index

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Extended Drude Model for Intraband-Transition-Induced Optical Nonlinearity

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Physical Review Applied 2019年第6期11卷 064062-064062页

作者： Heng Wang Kang Du Chuhao Jiang Zhiqiang Yang Lixia Ren Wending Zhang Soo Jin Chua Ting Mei MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions and Shaanxi Key Laboratory of Optical Information Technology School of Science Northwestern Polytechnical University Xi’an 710072 China Department of Electrical and Computer Engineering National University of Singapore 4 Engineering Drive 3 Singapore 117583 LEES Program Singapore-MIT Alliance for Research & Technology (SMART) 1 CREATE Way #10-01 CREATE Tower Singapore 138602

No existing model has completely explained the physics of the optical nonlinearity for epsilon-near-zero materials, which have recently emerged as candidates for design and fabrication of active nanophotonic devices. We propose to extend the Drude model by adopting a weighted electron effective mass, which takes into account the electron distribution in the nonparabolic conduction band. The extended Drude model is able to interpret the cause of the nonlinearity and provide a functional relationship between the refractive index and wavelength. Both the band nonparabolicity and the temperature-dependent mobility are responsible for the intraband-transition-induced optical nonlinearity. The spectrally resolved nonlinear refractive index and nonlinear susceptibilities are obtained from this model. The results can be applied to other transparent conducting oxides and will help in the design and modeling of spectral responses of nonlinear plasmonic devices.

关键词： Electronic transitions Nonlinear optical susceptibility Optoelectronics Plasmonics Ultrafast optics Thin films Free-electron model Ultrafast pump-probe spectroscopy

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Lithium-Ion Batteries: Operando Magnetometry Probing the Charge Storage Mechanism of CoO Lithium-Ion Batteries (Adv. Mater. 12/2021)

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Advanced materials 2021年第12期33卷

作者： Hongsen Li Zhengqiang Hu Qingtao Xia Hao Zhang Zhaohui Li Huaizhi Wang Xiangkun Li Fengkai Zuo Fengling Zhang Xiaoxiong Wang Wanneng Ye Qinghao Li Yunze Long Qiang Li Shishen Yan Xiaosong Liu Xiaogang Zhang Guihua Yu Guo-Xing Miao College of Physics Center for Marine Observation and Communications Qingdao University Qingdao 266071 China School of Physics State Key Laboratory of Crystal Materials Shandong University Jinan 250100 China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology (SIMIT) Chinese Academy of Sciences Shanghai 200050 China College of Material Science and Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China Materials Science and Engineering Program and Department of Mechanical Engineering The University of Texas at Austin Austin TX 78712 USA Department of Electrical and Computer Engineering & Institute for Quantum Computing University of Waterloo Waterloo ON N2L 3G1 Canada

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Combination of Knoevenagel Polycondensation and Water-Assisted Dynamic Michael-Addition-Elimination for the Synthesis of Vinylene-Linked 2D Covalent Organic Frameworks

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Angewandte Chemie 2022年第21期134卷

作者： Dr. Shunqi Xu Dr. Zhongquan Liao Dr. Arezoo Dianat Dr. Sang-Wook Park Dr. Matthew A. Addicoat Dr. Yubin Fu Dominik L. Pastoetter Filippo Giovanni Fabozzi Dr. Yannan Liu Prof. Gianaurelio Cuniberti Dr. Marcus Richter Prof. Stefan Hecht Prof. Xinliang Feng Chair of Molecular Functional Materials Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry Technische Universität Dresden Mommsenstrasse 4 01069 Dresden Germany Department of Synthetic Materials and Functional Devices Max-Planck Institute of Microstructure Physics 06120 Halle Germany Fraunhofer Institute for Ceramic Technologies and Systems (IKTS) 01109 Dresden Germany Chair of Material Science and Nanotechnology Faculty of Mechanical Science and Engineering Technische Universität Dresden Hallwachstraße 3 01069 Dresden Germany Leibniz-Institute for Polymer Research Dresden e.V. (IPF) 01069 Dresden Germany School of Science and Technology Nottingham Trent University Clifton Lane Nottingham NG11 8NS UK DWI-Leibniz Institute for Interactive Materials & Institute of Technical and Macromolecular Chemistry RWTH Aachen University 52074 Aachen Germany

Vinylene-linked two-dimensional conjugated covalent organic frameworks (V-2D-COFs), belonging to the class of two-dimensional conjugated polymers, have attracted increasing attention due to their extended π-conjugation over the 2D backbones associated with high chemical stability. The Knoevenagel polycondensation has been demonstrated as a robust synthetic method to provide cyano (CN)-substituted V-2D-COFs with unique optoelectronic, magnetic, and redox properties. Despite the successful synthesis, it remains elusive for the relevant polymerization mechanism, which leads to relatively low crystallinity and poor reproducibility. In this work, we demonstrate the novel synthesis of CN-substituted V-2D-COFs via the combination of Knoevenagel polycondensation and water-assisted dynamic Michael-addition-elimination, abbreviated as KMAE polymerization. The existence of C=C bond exchange between two diphenylacrylonitriles ( M1 and M6 ) is firstly confirmed via in situ high-temperature NMR spectroscopy study of model reactions. Notably, the intermediate M4 synthesized via Michael-addition can proceed the Michael-elimination quantitatively, leading to an efficient C=C bond exchange, unambiguously confirming the dynamic nature of Michael-addition-elimination. Furthermore, the addition of water can significantly promote the reaction rate of Michael-addition-elimination for highly efficient C=C bond exchange within 5 mins. As a result, the KMAE polymerization provides a highly efficient strategy for the synthesis of CN-substituted V-2D-COFs with high crystallinity, as demonstrated by four examples of V-2D-COF-TFPB-PDAN, V-2D-COF-TFPT-PDAN, V-2D-COF-TFPB-BDAN, and V-2D-COF-HATN-BDAN, based on the simulated and experimental powder X-ray diffraction (PXRD) patterns as well as N 2 -adsorption–desorption measurements. Moreover, high-resolution transmission electron microscopy (HR-TEM) analysis shows crystalline domain sizes ranging from 20 to 100 nm for the newly synthesized V-2D-COF

关键词： Dynamic Chemistry Knoevenagel Polymerization Two-Dimensional Organic Framework Vinylene-Linked Systems

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In-situ TEM Heating Experiment to Study Effects of Cyclic Thermal Gradients on Ti-6Al-4V under Additive Manufacturing Growth Conditions

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Microscopy and Microanalysis 2018年第S1期24卷 1932-1933页

作者： Meiyue Shao Cheng-Han Li Curtis L. Frederick Sudarsanam S. Babu Joerg R. Jinschek Department of Material Science and Engineering The Ohio State University Columbus OH. Department of Material Science and Engineering University of Tennessee Knoxville TN. Department of Mechanical Aerospace and Biomedical Engineering University of Tennessee Knoxville TN. Advanced Manufacturing Program Energy and Environmental Sciences Division Oak Ridge National Laboratory Knoxville TN.

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