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From UV to NIR: A Full‐Spectrum Metal‐Free Photocatalyst for Efficient polymer Synthesis in Aqueous Conditions

Angewandte Chemie 2020年第48期132卷

作者： Stephanie Allison‐Logan Qiang Fu Yongkang Sun Min Liu Jijia Xie Junwang Tang Greg G. Qiao Polymer Science Group Department of Chemical Engineering University of Melbourne Parkville VIC 3010 Australia Centre for Technology in Water and Wastewater (CTWW) School of Civil and Environmental Engineering University of Technology Sydney Ultimo NSW 2007 Australia Solar Energy & Advanced Materials Research Group Department of Chemical Engineering University College London Torrington Place London WC1E JE UK

Photo‐mediation offers unparalleled spatiotemporal control over controlled radical polymerizations (CRP). Photo‐induced electron/energy transfer reversible addition–fragmentation chain transfer (PET‐RAFT) polymerization is particularly versatile owing to its oxygen tolerance and wide range of compatible photocatalysts. In recent years, broadband‐ and near‐infrared (NIR)‐mediated polymerizations have been of particular interest owing to their potential for solar‐driven chemistry and biomedical applications. In this work, we present the first example of a novel photocatalyst for both full broadband‐ and NIR‐mediated CRP in aqueous conditions. Well‐defined polymers were synthesized in water under blue, green, red, and NIR light irradiation. Exploiting the oxygen tolerant and aqueous nature of our system, we also report PET‐RAFT polymerization at the microliter scale in a mammalian cell culture medium.

关键词： NIR photocatalysis photopolymerization RAFT polymerization

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Organic Solar Cells: High-Efficiency Organic Photovoltaics using Eutectic Acceptor Fibrils to Achieve Current Amplification (Adv. Mater. 18/2021)

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Advanced Materials 2021年第18期33卷

作者： Ming Zhang Lei Zhu Tianyu Hao Guanqing Zhou Chaoqun Qiu Zhe Zhao Nicolai Hartmann Biao Xiao Yecheng Zou Wei Feng Haiming Zhu Maojie Zhang Yongming Zhang Yongfang Li Thomas P. Russell Feng Liu School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules In-situ Center for Physical Science and Center of Hydrogen Science Shanghai Jiao Tong University Shanghai 200240 P. R. China Neaspec GmbH Eglfinger Weg 2 Haar 85540 Germany Key Laboratory of Optoelectronic Chemical Materials and Devices Ministry of Education School of Chemical and Environmental Engineering Jianghan University Hubei 430056 P. R. China State Key Laboratory of Fluorinated Functional Membrane Materials and Dongyue Future Hydrogen Energy Materials Company Zibo City Shandong 256401 P. R. China Department of Chemistry Zhejiang University Zhejiang 310027 P. R. China Laboratory of Advanced Optoelectronic Materials College of Chemistry Chemical Engineering and Materials Science Soochow University Jiangsu 215123 P. R. China Department of Polymer Science and Engineering University of Massachusetts Amherst MA 01003 USA

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Potential anti-corrosion additives derived from waste plastic sachets

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IOP Conference Series: Materials science and engineering 2019年第1期634卷

作者： F D T Eugenio B B Pajarito Environmental Engineering Program College of Engineering University of the Philippines Diliman Quezon City 1101 Philippines Polymer Research Laboratory Department of Chemical Engineering College of Engineering University of the Philippines Diliman Quezon City 1101 Philippines

Corrosion is a perennial problem that has a significant burden on the economy and environment. Recent studies have suggested that organic fillers can serve as corrosion inhibitors. In this work, the use of comminuted waste plastic sachets (WPS) as an anti-corrosion additive to commercial coating was explored. The effect of WPS lamination and loading on the viscosity, film thickness, and corrosion behavior of a red oxide primer paint was investigated. Results show that the viscosity and film thickness of the coating were only affected by the addition of WPS at high loading. At low loading, comminuted WPS reduced the corrosion rate of the coating by 99%. The presence of metal lamination in WPS contributes to the corrosion resistance of the coating. In conclusion, comminuted WPS demonstrates its potential in enhancing the anti-corrosion properties of coatings.

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Covalent Adaptable Networks: Toward Stimuli‐Responsive Dynamic Thermosets through Continuous Development and Improvements in Covalent Adaptable Networks (CANs) (Adv. Mater. 20/2020)

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Advanced Materials 2020年第20期32卷

作者： Maciej Podgórski Benjamin D. Fairbanks Bruce E. Kirkpatrick Matthew McBride Alina Martinez Adam Dobson Nicholas J. Bongiardina Christopher N. Bowman Department of Chemical and Biological Engineering University of Colorado UCB 596 Boulder CO 80309 USA Department of Polymer Chemistry Faculty of Chemistry Maria Curia‐Sklodowska University pl. Marii Curie‐Sklodowskiej 5 Lublin 20‐031 Poland Medical Scientist Training Program School of Medicine University of Colorado Aurora CO 80045 USA Materials Science and Engineering Program University of Colorado Boulder CO 80309 USA

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Large-Area Crystalline Zeolitic Imidazolate Framework Thin Films

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Angewandte Chemie 2021年第25期133卷

作者： Dr. Zhi Chen Dr. Rui Wang Dr. Tao Ma Dr. Jin-Long Wang Dr. Yu Duan Dr. Zhi-Zhan Dai Jie Xu Hui-Juan Wang Dr. Jiayin Yuan Prof. Hai-Long Jiang Prof. Yue-Wei Yin Prof. Xiao-Guang Li Prof. Min-Rui Gao Prof. Shu-Hong Yu Division of Nanomaterials & Chemistry Hefei National Laboratory for Physical Sciences at the Microscale Institute of Energy Hefei Comprehensive National Science Center CAS Center for Excellence in Nanoscience Institute of Biomimetic Materials & Chemistry Anhui Engineering Laboratory of Biomimetic Materials Department of Chemistry University of Science and Technology of China Hefei 230026 China Shenzhen Key Laboratory for Functional Polymer College of Chemistry and Environment Engineering Shenzhen University Shenzhen Guangdong 518060 China Hefei National Laboratory for Physical Sciences at the Microscale Department of Physics and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics University of Science and Technology of China Hefei 230026 China Institute of Functional Nano and Soft Materials (FUNSOM) & Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University Suzhou 215123 China Experimental Center of Engineering and Material Science University of Science and Technology of China Hefei 230026 China Department of Materials and Environmental Chemistry Stockholm University 10691 Stockholm Sweden Collaborative Innovation Center of Advanced Microstructures Nanjing 210093 China

We report that continuous MOF films with highly controlled thickness (from 44 to 5100 nm) can be deposited over length scales greater than 80 centimeters by a facile, fast, and cost-effective spray-coating method. Such success relies on our discovery of unprecedented perfectly dispersed colloidal solutions consisting of amorphous MOF nanoparticles, which we adopted as precursors that readily converted to the crystalline films upon low-temperature in situ heating. The colloidal solutions allow for the fabrication of compact and uniform MOF films on a great deal of substrates such as fluorine-doped tin oxide, glass, SiO 2 , Al 2 O 3 , Si, Cu, and even flexible polycarbonate, widening their technological applications where substrates are essential. Despite the present work focuses on the fabrication of uniform cobalt-(2-methylimidazole) 2 and zinc-(2-methylimidazole) 2 films, our findings mark a great possibility in producing other high-quality MOF thin films on a large scale.

关键词： crystallization metal–organic frameworks thin films ZIF-67

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Inhibition of the fibrillation of highly amyloidogenic human calcitonin by cucurbituril with improved bioactivity

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Acta biomaterialia 2018年 78卷 178-188页

作者： Hui Shang Anna Zhou Jian Jiang Yanpeng Liu Jing Xie Sheyu Li Yantao Chen Xiaofeng Zhu Hong Tan Jianshu Li Department of Biomedical Polymers and Artificial Organs College of Polymer Science and Engineering Sichuan University Chengdu 610065 China. College of Life Sciences Sichuan University Chengdu 610065 China. Department of Endocrinology and Metabolism West China Hospital Sichuan University Chengdu 610065 China. Shenzhen Key Laboratory of Functional Polymer College of Chemistry and Environmental Engineering Shenzhen University Shenzhen 518060 China. Electronic address: ytchen@***. College of Life Sciences Sichuan University Chengdu 610065 China. Electronic address: zhuxiaofeng@***. Department of Biomedical Polymers and Artificial Organs College of Polymer Science and Engineering Sichuan University Chengdu 610065 China State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 China. Electronic address: jianshu_li@***.

Protein/peptide fibrillation is an important challenge for biotechnological drug development. Salmon calcitonin (sCT) is currently used in the clinical treatment of bone-related diseases such as osteoporosis and hypercalcemia, but it still has the risk of immune responses. Although human calcitonin (hCT) would be a better choice in terms of immunogenicity, it has a strong tendency to irreversibly aggregate in aqueous solutions and form long amyloid fibrils, which significantly reduces its bioavailability and therapeutic potency. Here, we demonstrate that cucurbit[7]uril (CB[7]) can inhibit hCT fibrillation by supramolecular interaction with its aromatic groups (affinity: Phe16 > Tyr12 > Phe19 > Phe22). The hCT-CB[7] complex exhibits low cytotoxicity, even promotes osteoblast proliferation and osteogenic capacity of MC3T3 cells. Meanwhile the hCT-CB[7] complexes shows higher bioactivity compared to hCT in reducing blood calcium levels in rats, and also decreases the immunogenicity of hCT. These results suggest that CB[7] has the potential to improve the therapeutic potency of amyloidogenic protein/peptide drugs such as hCT.

关键词： Amyloid beta-peptides Cucurbit[7]uril Human calcitonin Inhibitor Supramolecular chemistry

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Metallo-Helicoid with Double Rims: polymerization Followed by Folding by Intramolecular Coordination

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Angewandte Chemie 2020年第3期133卷

作者： Dr. Guang-Qiang Yin Sneha Kandapal Chung-Hao Liu Dr. Heng Wang Dr. Jianxiang Huang Shu-Ting Jiang Tan Ji Yu Yan Sandra Khalife Dr. Ruhong Zhou Dr. Libin Ye Dr. Bingqian Xu Dr. Hai-Bo Yang Dr. Mu-Ping Nieh Dr. Xiaopeng Li College of Chemistry and Environmental Engineering Shenzhen University Shenzhen Guangdong 518055 China Single Molecule Study Laboratory College of Engineering and Nanoscale Science and Engineering Center University of Georgia Athens GA 30602 USA Department of Chemical and Biomolecular Engineering University of Connecticut Storrs CT 06269 USA Institute of Quantitative Biology Zhejiang University Hangzhou Zhejiang 310027 China Shanghai Key Laboratory of Green Chemistry and Chemical Processes Department of Chemistry East China Normal University Shanghai 200062 China Department of Chemistry University of South Florida Tampa FL 33620 USA Department of Cell Biology Microbiology and Molecular Biology University of South Florida Tampa FL 33620 USA Polymer Program Institute of Material Science University of Connecticut Storrs CT 06269 USA

In this study, we established a feasible strategy to construct a new type of metallo-polymer with helicoidal structure through the combination of covalent polymerization and intramolecular coordination-driven self-assembly. In the design, a tetratopic monomer ( M ) was prepared with two terminal alkynes in the outer rim for polymerization, and two terpyridines (TPYs) in the inner rim for subsequent folding by selective intramolecular coordination. Then, the linear covalent polymer ( P ) was synthesized by polymerization of M via Glaser-Hay homocoupling reaction. Finally, intramolecular coordination interactions between TPYs and Zn(II) folded the backbone of P into a right- or left-handed metallo-helicoid ( H ) with double rims. Owing to multiple positive charges on the inner rim of helicoid, double-stranded DNA molecules (dsDNA) could interact with H through electrostatic interactions. Remarkably, dsDNA allowed exclusive formation of H with right handedness by means of chiral induction.

关键词： coordination-driven self-assembly helicoid metallo-polymers terpyridine tetraphenylethylene

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MXenes based nano-heterojunctions and composites for advanced photocatalytic environmental detoxification and energy conversion: A review

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Chemosphere 2022年第PT 1期291卷 132923页

作者： Sunil Kumar Sharma Amit Kumar Gaurav Sharma Dai-Viet N Vo Alberto García-Peñas Omid Moradi Mika Sillanpää School of Advance Chemical Sciences Shoolini University Solan Himachal Pradesh India 173229. College of Materials Science and Engineering Shenzhen Key Laboratory of Polymer Science and Technology Guangdong Research Center for Interfacial Engineering of Functional Materials Nanshan District Key Laboratory for Biopolymers and Safety Evaluation Shenzhen University Shenzhen 518060 PR China International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS) Shoolini University India 173229 School of Science and Technology Glocal University Saharanpur India. Electronic address: mittuchem83@***. International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS) Shoolini University India 173229. Electronic address: gaurav8777@***. Center of Excellence for Green Energy and Environmental Nanomaterials (CE@GrEEN) Nguyen Tat Thanh University 300A Nguyen Tat Thanh District 4 Ho Chi Minh City 755414 Viet Nam. University Carlos III of Madrid Av. de la Universidad 3028911 Leganés Madrid Spain. Department of Chemistry Shahr-e-Qods Branch Islamic Azad University Tehran Iran. Environmental Engineering and Management Research Group Ton Duc Thang University Ho Chi Minh City Viet Nam Faculty of Environment and Labour Safety Ton Duc Thang University Ho Chi Minh City Viet Nam. Electronic address: mika.sillanpaa@tdtu.edu.vn.

Extensive research is being done to develop multifunctional advanced new materials for high performance photocatalytic applications in the field of energy production and environmental detoxification, MXenes have emerged as promising materials for enhancing photocatalytic performance owing to their excellent mechanical properties, appropriate Fermi levels, and adjustability of chemical composition. Numerous experimental and theoretical research works implied that the dimensions of MXenes have a significant impact on their performance. For photocatalysis to thrive in the future, we must understand the current state of the art for MXene in different dimensions. Using MXene co-catalysts in widely used in photocatalytic applications such as CO reduction, hydrogen production and organic pollutant oxidation, this study focuses on the most recent developments in MXenes based materials, structural modifications, innovations in reaction and material engineering. It has been reported that using 5 mg of CdS-MoS-MXene researchers were able to generate as high as 9679 μmol/g/h hydrogen under visible light. The MXenes based heterojunction photocatalyst CoO/MXene was utilized to degrade 95% bisphenol A micro-pollutant in just 7 min. Numerous novel materials, their preparations and performances have been discussed. Depending upon the nature of MXene-based materials, the synthesis techniques and photocatalytic mechanism of MXenes as co-catalyst are also summarized. Finally, some final thoughts and prospects for developing highly efficient MXene-based photocatalysts are provided which will indeed motivate researchers to design novel hybrid materials based on MXenes for sustainable solutions to energy and pollution issues.

关键词： Energy conversion Hazardous pollutants MXenes Photocatalysis Water pollution

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Competition between delamination and fracture in multiple peeling problems

arXiv

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arXiv 2019年

作者： Brely, Lucas Bosia, Federico Dhinojwala, Ali Pugno, Nicola M. Department of Physics and "Nanostructured Interfaces and Surfaces" Inter-Departmental Centre Università di Torino Via P. Giuria 1 Torino10125 Italy Department of Polymer Science University of Akron AkronOH44325-3909 United States Laboratory of Bio-Inspired & Graphene Nanomechanics Department of Civil Environmental and Mechanical Engineering Università di Trento via Mesiano 77 TrentoI-38123 Italy School of Engineering and Materials Science Queen Mary University of London Mile End Road LondonE1 4NS KET Labs Edoardo Amaldi Foundation Via del Politecnico snc Rome00133 Italy

Adhesive attachment systems consisting of multiple tapes or strands are commonly found in nature, for example in spider web anchorages or in mussel byssal threads, and their structure has been found to be ingeniously architected in order to optimize mechanical properties, in particular to maximize dissipated energy before full detachment. These properties emerge from the complex interplay between mechanical and geometric parameters, including tape stiffness, adhesive energy, attached and detached lengths and peeling angles, which determine the occurrence of three main mechanisms: elastic deformation, interface delamination and tape fracture. In this paper, we introduce a formalism to evaluate the mechanical performance of multiple tape attachments in different parameter ranges, allowing to predict the corresponding detachment behaviour. We also introduce a numerical model to simulate the complex multiple peeling behaviour of complex structures, illustrating its predictions in the case of the staple-pin architecture. We expect the presented formalism and numerical model to provide important tools for the design of bioinspired adhesive systems with tunable or optimized detachment properties. Copyright © 2019, The Authors. All rights reserved.

关键词： Fracture

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Double-Atom Catalysts: “More is Different:” Synergistic Effect and Structural engineering in Double-Atom Catalysts (Adv. Funct. Mater. 3/2021)

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Advanced Functional Materials 2021年第3期31卷

作者： Yiran Ying Xin Luo Jinli Qiao Haitao Huang Department of Applied Physics and Research Institute for Smart Energy The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong P. R. China State Key Laboratory of Optoelectronic Materials and Technologies Centre for Physical Mechanics and Biophysics School of Physics Sun Yat-sen University Guangzhou 510275 P. R. China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Environmental Science and Engineering Donghua University 2999 Renmin North Road Shanghai 201620 P. R. China

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