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Vibration-Regulated Multi-State Long-Lived Emission from Star-Shaped Molecules

Angewandte Chemie 2022年第48期134卷

作者： Yiran Li Dr. Glib V. Baryshnikov Dr. Farhan Siddique Dr. Peng Wei Prof. Hongwei Wu Prof. Tao Yi State Key Laboratory for Modification of Chemical Fiber and Polymer Materials Key Lab of Science and Technology of Eco-Textile Ministry of Education College of Chemistry and Chemical Engineering Donghua University Shanghai 201620 China State Key Laboratory of Molecular Engineering of Polymers Department of Chemistry Fudan University Shanghai 200433 China Laboratory of Organic Electronics Department of Science and Technology Linköping University 60174 Norrköping Sweden

How to utilize molecular vibration to tune triplet-involved emissions in multiple states is highly challenging. Here, star-shaped triphenylamine derivatives have been employed as model systems to understand how molecular vibration affects thermally activated delayed fluorescence (TADF) and room temperature phosphorescence (RTP) emissions in multiple states. Nonplanar, star-shaped conformations allow molecules to generate appropriate vibrations in the solution state, facilitating vibronic coupling between their T 1 and T 2 states to generate effective TADF. More importantly, a relatively dispersed state can allow the molecules to efficiently vibrate in the solid state, and a crystalline environment further promotes a more efficient TADF. Lastly, by suppressing molecular vibration to inhibit the TADF, ultra-long RTP was observed upon doping these molecules into polymers. These molecules can be used in information encryption and storage as well as bioimaging.

关键词： Anti-Counterfeiting Bioimaging Room Temperature Phosphorescence Thermal Activation Delayed Fluorescence Vibronic Coupling

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A Dynamic Metal-Organic Radical Emission System

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Angewandte Chemie 2024年第12期137卷

作者： Xiang Li Prof. Yuan Wang Prof. Glib V. Baryshnikov Ihor Sahalianov Prof. Hans Ågren Yuri Tanuma Prof. Zhiyun Zhang Prof. Cheng Qian Dr. Muyu Cong Prof. Tao Yi Prof. Hongwei Wu State Key Laboratory for Modification of Chemical Fiber and Polymer Materials Key Lab of Science and Technology of Eco-Textile Ministry of Education College of Chemistry and Chemical Engineering Donghua University Shanghai 201620 China Beijing National Laboratory of Molecular Sciences and CAS Key Laboratory of Colloid Interface and Thermodynamics Institute of Chemistry Chinese Academy of Sciences North First Street 2 Zhongguancun Beijing 100190 China Laboratory of Organic Electronics Department of Science and Technology Linköping University SE-60174 Norrköping Sweden Wallenberg Initiative Materials Science for Sustainability Department of Science and Technology Linköping University SE-60174 Norrköping Sweden Department of Physics and Astronomy Uppsala University Uppsala SE-751 20 Sweden Jožef Stefan Institute Jamova 39 1000 Ljubljana Slovenia Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Center for Materiobiology and Dynamic Chemistry East China University of Science & Technology Shanghai 200237 P. R. China

Developing new organic radical emission systems and regulating their luminescence properties presents a significant challenge. Herein, we build dynamic and multi-emission band radical luminescence systems by co-assembling inorganic metal salts with carbonyl compounds in ionic liquids. After the assembling, dual-band, and excitation wavelength-dependent emission was observed upon ultraviolet light irradiation, one emission band originates from carbonyl radical after light irradiation, the other band from the ligand-metal charge transfer (LMCT) state, which benefits from the charge transfer from the radicals to the metal salts. The dual emission centers also introduce excitation wavelength-dependent properties for the molecules. In addition, three-band emission covering the visible and near-infrared regions can be shown when two or three kinds of metal ions are simultaneously doped into the radical system driven by the ligand-metal-metal charge transfer (LMMCT). Interestingly, visible light can quickly quench the radical emission of systems, thus realizing a dynamic luminescence. The LMMCT effect and strong supramolecular interactions significantly improve the photoluminescence quantum yield by up to 67.2 %. Moreover, such materials can be successfully used for detecting radioactive metal ions and information encryption. This study develops a platform for manufacturing various metal-organic radical emission systems with diverse properties.

关键词： metal-organic radical multi-band emission dynamic luminescence supramolecular interactions information encryption

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Electrospinning and electrospun nanofibers: From academic research to industrial production

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Progress in Materials science 2025年 154卷

作者： Wang, Ce Wang, Wei Qi, Hongxu Dai, Yunqian Jiang, Shaohua Ding, Bin Wang, Xianfeng Li, Congju Zeng, Jinfeng Wu, Tong Li, Haoyi Wang, Yuanfei Zhao, Yong Wang, Wenli Li, Zhenyu Mo, Xiumei Hou, Haoqing Dong, Lijie Ma, Hongyang Liu, Yong Su, Chunlei Bai, Jie Wu, Weiwei Guo, Gang Nie, Guangdi Wang, Nü Zhu, Han Bai, Jing Fang, Jian Liang, Daxin Ba, Zhichen Han, Guangping Lu, Xiaofeng Wang, Kaizhong Zhang, Xiaoyong Kang, Weimin Deng, Nanping Hu, Wei Chen, Weihua Zhang, Xiuling Yang, Dongzhi Wang, Fengyun Bian, Ye Liu, Zi'ang Zhang, Liang Li, Xiang Li, Lei Li, Yongxin Huang, Hui Jia, Xiaoteng Li, Xiaofeng Yang, Daxiang Jin, Xianchang Li, Shiyang Zhang, Xindan Tang, Nan Hao, Ruinan Tian, Feng Mai, Liqiang Wei, Yen Xue, Jiajia Alan G. MacDiarmid Institute Jilin University Changchun130012 China Harbin Institute of Technology Harbin150001 China Tsinghua University Beijing100084 China Southeast University Nanjing211189 China Nanjing Forestry University Nanjing210037 China Donghua University Shanghai201620 China Qingdao University Qingdao266071 China State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology Beijing100029 China Qingdao Stomatological Hospital Affiliated to Qingdao University Qingdao260001 China School of Chemistry Beihang University Beijing100191 China College of Textile and Clothing Engineering Jiangsu Engineering Research Center of Textile Dyeing and Finishing for Energy Conservation Discharge Reduction and Cleaner Production National Engineering Laboratory for Morden Silk Soochow University Suzhou215123 China Southwest Petroleum University Chegdu610500 China Jiangxi Normal University Nanchang330022 China Wuhan University of Technology Wuhan430070 China Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China Inner Mongolia University of Technology Hohhot010051 China Xidian University Xian710071 China Sichuan University Chengdu610065 China Beihang University Beijing100191 China Jiangnan University Wuxi214122 China Northeast Forestry University Harbin150040 China Jilin University Changchun130012 China First Hospital of Jilin University Changchun130031 China Nanchang University Nanchang330031 China Tiangong University Tianjin300387 China Northeast Normal University Changchun130024 China Zhengzhou University Zhengzhou450001 China University of Science and Technology Beijing Beijing100083 China Co. Ltd. Chongqing404617 China Beijing Guo Wei Na Research Center for Fiber Materials Beijing China Shanghai University Shanghai200444 China South China University of Technology Guangzhou510006 China State Key Laboratory of Advanced Technology for Materials Synthesis and Pr

Electrospinning is a versatile and rapidly evolving technique that has gained significant attention for its ability to produce nanofibers with unique structures and properties. Over the past few decades, the scope of electrospun nanofibers has expanded from simple polymer fibers to more complex composites and ceramics, enabling a wide range of applications across fields such as environmental protection, biomedical engineering, energy storage, and smart materials. This review provides a comprehensive overview of recent advancements, covering material selection, process optimization, and innovative applications. We discuss the unique structural features of electrospun nanofibers, including their tunable diameters, porous architectures, and diverse compositions, which underpin their multifunctionality. Key applications are highlighted in areas including environmental protection and safety, biomedical engineering, energy storage and conversion, and catalysis, as well as emerging uses in flexible electronics, advanced engineering materials, and textiles. Additionally, we review state-of-the-art characterization techniques and discuss the challenges and opportunities involved in scaling up industrial production. Finally, we offer a forward-looking perspective on the future of electrospun nanofibers, emphasizing the need for continued innovation in both academic research and commercial applications. © 2025 Elsevier Ltd

关键词： Medical applications

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Bistable polymer Actuators: Bioinspired Electrically Activated Soft Bistable Actuators (Adv. Funct. Mater. 35/2018)

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Advanced Functional Materials 2018年第35期28卷

作者： Huiqi Shao Shuzhen Wei Xin Jiang Douglas P. Holmes Tushar K. Ghosh Department of Textile Engineering Chemistry and Science Fiber & Polymer Science Program North Carolina State University Raleigh NC 27695 USA Department of Mechanical Engineering Boston University Boston MA 02215 USA

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Recycling Of PP/LDPE blend: Miscibility, thermal properties, rheological behavior and crystal structure 74

Recycling Of PP/LDPE blend: Miscibility, thermal properties,...

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74th Annual Technical Conference and Exhibition of the Society of Plastics Engineers, SPE ANTEC Indianapolis 2016

作者： Aumnate, Chuanchom Spicker, Claudia Kiesel, Raphael Samadi, Majid Rudolph, Natalie Mechanical Engineering Department Polymer Engineering Center University of Wisconsin-Madison WI United States Textile Science Department of Design Studies and Materials Science Graduate Program University of Wisconsin-Madison WI United States

ISBN: (纸本)9780692719619

Blending of plastics used in packaging is an interesting approach for recycling or upcycling. Therefore, this study focused on the effects of processing on the properties of recycled PP and PP/LDPE blends. MFI measurements, Differential Scanning Calorimetry (DSC) and hot-stage polarized optical microscopy techniques were used to investigate the miscibility of PP/LDPE blends based on the thermal properties, degree of crystallinity, crystallization and morphology development in the blends. The MFI indicates, that PP and PP/LDPE blends are marginally sensitive to degradation at common processing conditions. The degree of crystallinity of the blends decreases with an increase of the LDPE content. Furthermore, the spherulite growth rate and crystal size of PP decrease with an increase of LDPE content. The shifts of crystallization temperatures from the DSC measurement, in conjunction with the crystallization kinetics, indicate that PP/LDPE (25 wt% LDPE) is partially miscible.

关键词： Crystal structure

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Unconfined, melt-edge electrospinning for scale-up

Unconfined, melt-edge electrospinning for scale-up

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fiber Society 2016 Spring Conference: textile Innovations - Opportunities and Challenges

作者： Wang, Qingqing Randolph, Addison Thoppey, Nagarajan Muthuraman Bochinski, Jason R. Clarke, Laura I. Gorga, Russell E. School of Textiles and Clothing Jiangnan University China Biomedical Engineering NC State University United States Fiber and Polymer Science Program NC State University United States Department of Physics NC State University United States

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Bioprinting: 3D Bioprinting: from Benches to Translational Applications (Small 23/2019)

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Small 2019年第23期15卷

作者： Marcel Alexander Heinrich Wanjun Liu Andrea Jimenez Jingzhou Yang Ali Akpek Xiao Liu Qingmeng Pi Xuan Mu Ning Hu Raymond Michel Schiffelers Jai Prakash Jingwei Xie Yu Shrike Zhang Division of Engineering in Medicine Department of Medicine Brigham and Women's Hospital Harvard Medical School Cambridge MA 02139 USA Department of Biomaterials Science and Technology Section Targeted Therapeutics Technical Medical Centre University of Twente Enschede 7500AE The Netherlands Key Laboratory of Textile Science and Technology College of Textiles Donghua University Shanghai 201620 P. R. China Biomedical Engineering Laboratory Instituto Tecnológico y de Estudios Superiores de Monterrey Monterrey Nuevo León 64849 Mexico Center of Biomedical Materials 3D Printing National Engineering Laboratory for Polymer Complex Structure Additive Manufacturing Baoding 071000 P. R. China Department of Bioengineering Gebze Technical University 41400 Gebze Kocaeli Turkey Sabanci University Nanotechnology Research and Application Center Sabancı University 34956 Tuzla Istanbul Turkey Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education School of Biological Science and Medical Engineering Beijing Advanced Innovation Center for Biomedical Engineering Beihang University Beijing 100083 China Department of Plastic and Reconstructive Surgery Renji Hospital Shanghai Jiao Tong University School of Medicine Shanghai 200127 P. R. China Biosensor National Special Laboratory Key Laboratory of Biomedical Engineering of Education Ministry Department of Biomedical Engineering Zhejiang University Hangzhou 310027 P. R. China Department of Clinical Chemistry and Hematology University Medical Center Utrecht Utrecht 3584 CX The Netherlands Holland Regenerative Medicine Program University of Nebraska Medical Center Omaha NE 68198 USA

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Centrifugally-Spun energy-storage nanofibers

Centrifugally-Spun energy-storage nanofibers

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fiber Society's Spring 2015 Conference, in conjunction with the 2015 International Conference on Advanced fibers and polymer Materials: Functional fibers and textiles

作者： Zhang, Xiangwu Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University RaleighNC United States

Centrifugal spinning is a simple and versatile technique for producing nanofibers from various materials. One major application of centrifugal spinning is to produce advanced functional nanofibers for energy storage. Among the various energy storage technologies, supercapacitors have been considered as effective solution to the increasing need for high-power energy storage. Novel centrifugally-spun nanofibers with functional properties can dramatically alter surface reaction rates and charge transport throughout the supercapacitors, causing significant improvement in energy storage efficiency. Here, we present our work on the development of advanced functional nanofibers and the integration of these materials into advanced supercapacitors to achieve high system performance.

关键词： Nanofibers

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Carbon nanotube sheet electrodes for anisotropic actuation of dielectric elastomers

Carbon nanotube sheet electrodes for anisotropic actuation o...

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fiber Society's Spring 2015 Conference, in conjunction with the 2015 International Conference on Advanced fibers and polymer Materials: Functional fibers and textiles

作者： Fang, Xiaomeng Cakmak, Enes Yildiz, Ozkan Bradford, Philip D. Ghosh, Tushar K. Fiber and Polymer Science Program Textile Engineering Chemistry and Science Department North Carolina State University RaleighNC United States

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Electrochemical performance of electrospun α-Fe2O3/C nanofibers as anodes for lithium-ion batteries

Electrochemical performance of electrospun α-Fe2O3/C nanofi...

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fiber Society 2015 Fall Meeting and Technical Conference - fibers: Where Tradition Meets Innovation

作者： Zhu, Jiadeng Lu, Yao Chen, Chen Jasper, Samuel Zhang, Xiangwu Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University RaleighNC27695-8301 United States

Hematite iron oxide (α-Fe2O3) has received much attention for use as anode material in lithium-ion batteries not only due to its high theoretical capacity but also to its nontoxicity and low cost. However, its practical applications are limited by its low electrical conductivity as well as the large volume change during Li ion insertion/extraction process. Carbon coated α-Fe2O3 nanofibers were prepared via electrospinning followed by a thermal treatment process in this work, which were used as anode material for lithium-ion batteries. A high reversible capacity of 842 mAh g-1 at a current density of 50 mA g-1 at the 50th cycle was achieved for α-Fe2O3/C nanofibers containing 12.5 wt% carbon. Such excellent electrochemical performance could be attributed to their unique fabric structure and the conductive carbon coating which could shorten Li ion transport distance, improving Li ion reversibility and kinetic properties.

关键词： Nanofibers

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