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Titelbild: Bioinspired Color Switchable Photonic Crystal Silicone Elastomer Kirigami (Angew. Chem. 26/2021)

Angewandte Chemie 2021年第26期133卷

作者： Xintao Lai Jingsong Peng Prof. Qunfeng Cheng Prof. Antoni P. Tomsia Dr. Guanlei Zhao Prof. Lei Liu Prof. Guisheng Zou Prof. Yanlin Song Prof. Lei Jiang Prof. Mingzhu Li Key Laboratory of Green Printing Institute of Chemistry Chinese Academy of Sciences Beijing 100191 China School of Chemistry and Chemical Engineering University of Chinese Academy of Sciences Beijing 100049 China Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education School of Chemistry Beijing Advanced Innovation Center for Biomedical Engineering BUAA-UOW Joint Research Centre Beihang University Beijing 100191 China School of Materials Science and Engineering Zhengzhou University Zhengzhou 450001 China Department of Mechanical Engineering State Key Laboratory of Tribology Tsinghua University Beijing 100084 China Key Laboratory of Materials Processing and Mold (Zhengzhou University) Ministry of Education Zhengzhou 450002 China

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Bioinspired Color Switchable Photonic Crystal Silicone Elastomer Kirigami

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Angewandte Chemie 2021年第26期133卷

Bioinspired dynamic structural color has great potential for use in dynamic displays, sensors, cryptography, and camouflage. However, it is quite rare for artificial structural color devices to withstand thousands of cycles. Male hummingbird's crowns and gorgets are brightly colored, demonstrating frequent color switching that is induced by regulating the orientation of the feathers through movement of skin or joints. Inspired by this unique structural color modulation, we demonstrate a flexible, mechanically triggered color switchable sheet based on a photonic crystal (PhC)-coated polydimethylsiloxane (PDMS) kirigami (PhC-PDMS kirigami) made by laser cutting. Finite element modeling (FEM) simulation reveals that the thickness of PDMS kirigami and the chamfer at the incision induced by laser cutting both dominate the out-of-plane deformation through in-plane stretching. The bioinspired PhC-PDMS kirigami shows precisely programmable structural color and keeps the color very well after recycling over 10 000 times. This bioinspired PhC-PDMS kirigami also shows excellent viewability even in bright sunlight, high readability, robust functionality, technical flexibility, and mechanical durability, which are readily exploitable for applications, such as chromic mechanical monitors for the sports industry or for medical applications, wearable camouflage, and security systems.

关键词： bioinspired color switchable kirigami silicone elastomers

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Photo-driven Oxygen Vacancies Extends Charge Carrier Lifetime for Efficient Solar Water Splitting

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Angewandte Chemie 2021年第32期133卷

作者： Mao Sun Rui-Ting Gao Prof. Jinlu He Prof. Xianhu Liu Prof. Tomohiko Nakajima Prof. Xueyuan Zhang Prof. Lei Wang School of Chemistry and Chemical Engineering & Inner Mongolia Engineering and Technology Research Center for Catalytic Conversion and Utilization of Carbon Resource Molecules Inner Mongolia University 235 West University Street Hohhot 010021 China Key Laboratory of Materials Processing and Mold Ministry of Education Zhengzhou University Zhengzhou 450002 China Advanced Coating Technology Research Center National Institute of Advanced Industrial Science and Technology Tsukuba Central 5 1-1-1 Higashi Tsukuba Ibaraki 305-8565 Japan State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha 410082 China

A photocharge/discharge strategy is proposed to initiate the WO 3 photoelectrode and suppress the main charge recombination, which remarkably improves the photoelectrochemical (PEC) performance. The photocharged WO 3 surrounded by a 8–10 nm overlayer and oxygen vacancies could be operated more than 25 cycles with 50 h durability without significant decay on PEC activity. A photocharged WO 3 /CuO photoanode exhibits an outstanding photocurrent of 3.2 mA cm −2 at 1.23 V RHE with a low onset potential of 0.6 V RHE , which is one of the best performances of p-n heterojunction structure. Using nonadiabatic molecular dynamics combined with time-domain DFT, we clarify the prolonged charge carrier lifetime of photocharged WO 3 , as well as how electronic systems of photocharged WO 3 /CuO semiconductors enable the effective photoinduced electrons transfer from WO 3 into CuO. This work provides a feasible route to address excessive defects existed in photoelectrodes without causing extra recombination.

关键词： oxygen vacancies photocharging/discharging p-n heterojunctions solar water splitting tungsten

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[email protected] 2 hybrid microcapsules with high in vivo biocompatibility and stability for cell therapy

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Colloids and Surfaces B: Biointerfaces 2021年 203卷

作者： Grégory Leroux Myriam Neumann Christophe F. Meunier Virginie Voisin Isabelle Habsch Nathalie Caron Carine Michiels Li Wang Bao-Lian Su Laboratory of Inorganic Materials Chemistry (CMI) University of Namur 61 Rue de Bruxelles B-5000 Namur Belgium Namur Institute of Structured Matter (NISM) University of Namur 61 Rue de Bruxelles B-5000 Namur Belgium Molecular Physiology Research Unit (URPhyM) Namur Research Institute for Life Sciences (NARILIS) University of Namur 61 Rue de Bruxelles B-5000 Namur Belgium Laboratory of Biochemistry and Cell Biology (URBC) Namur Research Institute for Life Sciences (NARILIS) University of Namur 61 Rue de Bruxelles B-5000 Namur Belgium State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Luoshi Road 122 Wuhan 430070 China

Designing new materials to encapsulate living therapeutic cells for the treatment of the diseases caused by protein or hormone deficiencies is a great challenge. The desired materials need to be biocompatible towards both entrapped cells and host organisms, have long-term in vivo stability after implantation, allow the diffusion of nutrients and metabolites, and ensure perfect immune-isolation. The current work investigates the in vivo biocompatibility and stability of [email protected] 2 hybrid microcapsules and the immune-isolation of entrapped HepG2 cells, to assess their potential for cell therapy. A comparison was made with alginate-silica hybrid microcapsules (ASA). These two hybrid microcapsules are implanted subcutaneously in female Wistar rats. The inflammatory responses of the rats are monitored by the histological examination of the implants and the surrounding tissues, to indicate their in vivo biocompatibility towards the hosts. The in vivo stability of the microcapsules is evaluated by the recovery rate of the intact microcapsules after implantation. The immune-isolation of the entrapped cells is assessed by their morphology, membrane integrity and intracellular enzymatic activity. The results show high viability of the entrapped cells and insignificant inflammation of the hosts, suggesting the excellent biocompatibility of [email protected] 2 and ASA microcapsules towards both host organisms and entrapped cells. Compared to the ASA microcapsules, more intact [email protected] 2 hybrid microcapsules are recovered 2-day and 2-month post-implantation and more cells remain alive, proving their better in vivo biocompability, stability, and immune-isolation. The present study demonstrates that the [email protected] 2 hybrid microcapsule is a highly promising implantation material for cell therapy.

关键词： Hybrid hydrogels Cell encapsulation In vivo biocompatibility In vivo stability Immune isolation

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Ferroelectrics: Enhanced Ferroelectric and Visible-Light Photoelectric Properties in Multiferroic KBiFe2O5via Pressure-Induced Phase Transition (Adv. Electron. Mater. 3/2017)

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advanced Electronic materials 2017年第3期3卷

作者： Ganghua Zhang Fengliang Liu Tingting Gu Yongsheng Zhao Nana Li Wenge Yang Shouhua Feng Center for High Pressure Science and Technology Advanced Research (HPSTAR) Shanghai 201203 P. R. China Department of Physics Fudan University Shanghai 200433 P. R. China State Key Laboratory of Superhard Materials Jilin University Changchun 130012 P. R. China High Pressure Synergetic Consortium (HPSynC) Geophysical Laboratory Carnegie Institution of Washington Argonne IL 60439 USA State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China

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Formulating the Electrolyte Towards High-Energy and Safe Rechargeable Lithium–Metal Batteries

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Angewandte Chemie 2021年第30期133卷

作者： Qiang Ma Dr. Junpei Yue Min Fan Shuang-Jie Tan Dr. Juan Zhang Dr. Wen-Peng Wang Dr. Yuan Liu Yi-Fan Tian Dr. Quan Xu Prof. Ya-Xia Yin Prof. Ya You Prof. An Luo Prof. Sen Xin Prof. Xiong-Wei Wu Prof. Yu-Guo Guo College of Electrical and Information Engineering Hunan University Changsha Hunan 410082 P. R. China School of Chemistry and Materials Science College of Agronomy Hunan Agricultural University Changsha Hunan 410128 P. R. China CAS Key Laboratory of Molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular Sciences Beijing National Laboratory for Molecular Sciences (BNLMS) Institute of Chemistry Chinese Academy of Sciences (CAS) Beijing 100190 P. R. China Nanozyme Medical Center School of Basic Medical Sciences Zhengzhou University Zhengzhou 450001 P. R. China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 Hubei P. R. China

Rechargeable lithium–metal batteries with a cell-level specific energy of >400 Wh kg −1 are highly desired for next-generation storage applications, yet the research has been retarded by poor electrolyte–electrode compatibility and rigorous safety concerns. We demonstrate that by simply formulating the composition of conventional electrolytes, a hybrid electrolyte was constructed to ensure high (electro)chemical and thermal stability with both the Li-metal anode and the nickel-rich layered oxide cathodes. By employing the new electrolyte, Li∥LiNi 0.6 Co 0.2 Mn 0.2 O 2 cells show favorable cycling and rate performance, and a 10 Ah Li∥LiNi 0.8 Co 0.1 Mn 0.1 O 2 pouch cell demonstrates a practical specific energy of >450 Wh kg −1 . Our findings shed light on reasonable design principles for electrolyte and electrode/electrolyte interfaces toward practical realization of high-energy rechargeable batteries.

关键词： hybrid electrolytes in situ polymerization interfacial chemistry rechargeable lithium–metal batteries

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In Situ X-ray Absorption Spectroscopy of Metal/Nitrogen-doped Carbons in Oxygen Electrocatalysis

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Angewandte Chemie 2023年第27期135卷

作者： Bin Wu Tianxiao Sun Ya You Haibing Meng Dulce M. Morales Mailis Lounasvuori Abbas Beheshti Askari Li Jiang Feng Zeng Baoshan Hu Xiangzhi Zhang Renzhong Tai Zhichuan J. Xu Tristan Petit Liqiang Mai Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Albert-Einstein-Straße 15 12489 Berlin Germany Institute of Physics Humboldt University Berlin Newton-Straße 15 12489 Berlin Germany State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Luoshi Road 122 Wuhan 430070 China College of Chemistry Taiyuan University of Technology Taiyuan 030024 China Chemical Engineering group Engineering and Technology institute Groningen (ENTEG) Faculty of Science and Engineering University of Groningen Nijenborgh 4 9747 AG Groningen The Netherlands CAS Key Laboratory of Molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences (CAS) Beijing 100190 China State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University Nanjing 211816 China College of Chemistry and Chemical Engineering Chongqing University Chongqing 401331 (China) Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201204 China School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore

Metal/nitrogen-doped carbons (M−N−C) are promising candidates as oxygen electrocatalysts due to their low cost, tunable catalytic activity and selectivity, and well-dispersed morphologies. To improve the electrocatalytic performance of such systems, it is critical to gain a detailed understanding of their structure and properties through advanced characterization. In situ X-ray absorption spectroscopy (XAS) serves as a powerful tool to probe both the active sites and structural evolution of catalytic materials under reaction conditions. In this review, we firstly provide an overview of the fundamental concepts of XAS and then comprehensively review the setup and application of in situ XAS, introducing electrochemical XAS cells, experimental methods, as well as primary functions on catalytic applications. The active sites and the structural evolution of M−N−C catalysts caused by the interplay with electric fields, electrolytes and reactants/intermediates during the oxygen evolution reaction and the oxygen reduction reaction are subsequently discussed in detail. Finally, major challenges and future opportunities in this exciting field are highlighted.

关键词： Active Sites In Situ XAS M−N−C Catalysts Oxygen Electrocatalysis Structural Evolution

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23.1:Invited Paper:High efficiency and Stability of Ink-jet Printed Quantum Dot Light Emitting Diodes via Dual Ionic Surface Passivation

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SID Symposium Digest of Technical Papers 2021年第S1期52卷

作者： Chaoyu Xiang Longjia Wu Zizhe Lu Menglin Li Yanwei Wen Yixing Yang Wenyong Liu Ting Zhang Weiran Cao Sai-Wing Tsang Bin Shan Xiaolin Yan Lei Qian TCL Corporate Research No. 1001 Zhongshan Park Road Nanshan District Shenzhen 518067 China Division of Functional Materials and Nano Devices Ningbo Institute of Materials Technology and Engineering CAS Ningbo China Center of Super-Diamond and Advanced Films (COSDAF) City University of Hong Kong Hong Kong SAR P. R. China Department of Materials Science and Engineering City University of Hong Kong Hong Kong SAR P. R. China State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan 430074 Hubei People's Republic of China

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Ethylenedioxythiophene-Based Small Molecular Donor with Multiple Conformation Locks for Organic Solar Cells with Efficiency of 19.3 %

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Angewandte Chemie 2024年第25期136卷

作者： Dr. Qian Xie Xiangmeng Deng Prof. Chaowei Zhao Dr. Jie Fang Dr. Dongdong Xia Yuefeng Zhang Feng Ding Jiali Wang Mengdi Li Zhou Zhang Dr. Chengyi Xiao Prof. Xunfan Liao Prof. Lang Jiang Dr. Bin Huang Dr. Runying Dai Prof. Weiwei Li Institute of Applied Chemistry Jiangxi Academy of Sciences Nanchang 330096 P. R. China Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry School of Chemistry and Chemical Engineering Jiangxi University of Science and Technology Ganzhou 341000 P. R. China National Engineering Research Center for Carbohydrate Synthesis/Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education Jiangxi Normal University Nanchang 330022 P. R. China Beijing Advanced Innovation Center for Soft Matter Science and Engineering & State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology Beijing 100029 P. R. China Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China

Ternary organic solar cells (T-OSCs) represent an efficient strategy for enhancing the performance of OSCs. Presently, the majority of high-performance T-OSCs incorporates well-established Y-acceptors or donor polymers as the third component. In this study, a novel class of conjugated small molecules has been introduced as the third component, demonstrating exceptional photovoltaic performance in T-OSCs. This innovative molecule comprises ethylenedioxythiophene (EDOT) bridge and 3-ethylrhodanine as the end group, with the EDOT unit facilitating the creation of multiple conformation locks. Consequently, the EDOT-based molecule exhibits two-dimensional charge transport, distinguishing it from the thiophene-bridged small molecule, which displays fewer conformation locks and provides one-dimensional charge transport. Furthermore, the robust electron-donating nature of EDOT imparts the small molecule with cascade energy levels relative to the electron donor and acceptor. As a result, OSCs incorporating the EDOT-based small molecule as the third component demonstrate enhanced mobilities, yielding a remarkable efficiency of 19.3 %, surpassing the efficiency of 18.7 % observed for OSCs incorporating thiophene-based small molecule as the third component. The investigations in this study underscore the excellence of EDOT as a building block for constructing conjugated materials with multiple conformation locks and high charge carrier mobilities, thereby contributing to elevated photovoltaic performance in OSCs.

关键词： Organic solar cells ethylenedioxythiophene conformation locks power conversion efficiency

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High-Silica CHA Zeolite Membrane with Ultra-High Selectivity and Irradiation Stability for Krypton/Xenon Separation

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Angewandte Chemie 2021年第16期133卷

作者： Prof. Dr. Xuerui Wang Tao Zhou Ping Zhang Prof. Dr. Wenfu Yan Dr. Yongguo Li Dr. Li Peng Dylan Veerman Mengyang Shi Prof. Dr. Xuehong Gu Prof. Dr. Freek Kapteijn State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Jiangsu National Synergetic Innovation Center for Advanced Materials Nanjing Tech University No. 30 Puzhu South Road Nanjing 211816 P. R. China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China Environment Engineering Department China Institute for Radiation Protection Taiyuan 030006 P. R. China Chemical Engineering Department Delft University of Technology Van der Maasweg 9 2629 HZ Delft The Netherlands

Capture and storage of the long-lived 85 Kr is an efficient approach to mitigate the emission of volatile radionuclides from the spent nuclear fuel reprocessing facilities. However, it is challenging to separate krypton (Kr) from xenon (Xe) because of the chemical inertness and similar physical properties. Herein we prepared high-silica CHA zeolite membranes with ultra-high selectivity and irradiation stability for Kr/Xe separation. The suitable aperture size and rigid framework endures the membrane a strong size-exclusion effect. The ultrahigh selectivity of 51–152 together with the Kr permeance of 0.7–1.3×10 −8 mol m −2 s −1 Pa −1 of high-silica CHA zeolite membranes far surpass the state-of-the-art polymeric membranes. The membrane is among the most stable polycrystalline membranes for separation of humid Kr/Xe mixtures. Together with the excellent irradiation stability, high-silica CHA zeolite membranes pave the way to separate radioactive Kr from Xe for a notable reduction of the volatile nuclear waste storage volume.

关键词： CHA zeolite gas separation krypton membrane xenon

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