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Gesteuerte Reaktionsorthogonalität in der Polymer- und Materialwissenschaft

Angewandte Chemie 2019年第4期133卷

作者： Dr. Nathaniel Corrigan Dr. Mustafa Ciftci Dr. Kenward Jung Prof. Dr. Cyrille Boyer Centre for Advanced Macromolecular Design and Australian Centre for Nanomedicine School of Chemical Engineering UNSW Sydney 2052 Australia Department of Chemistry Faculty of Engineering and Natural Science Bursa Technical University Bursa 16310 Turkey

Die selektive Steuerung chemischer Reaktionen ist entscheidend für die genaue Regelung von Prozessen, die von komplizierten biologischen Systemen bis hin zur industriellen Fertigung in großem Maßstab reichen. Die Entwicklung der synthetischen Chemie hin zu einer Komplexität, wie sie in der Natur zu beobachten ist, erfordert eine erhöhte Kontrolle über viele konkurrierende chemische Reaktionen in einer nicht interferierenden (orthogonalen) Weise. Glücklicherweise kann der praktisch unerschöpfliche Pool der bisher entwickelten synthetischen chemischen Reaktionen oft auf orthogonale Weise kombiniert werden, um elegante Lösungen für komplexe chemische Probleme zu finden. In diesem Aufsatz werden zunächst einige der vielen photochemischen Reaktionen hervorgehoben, die in orthogonalen Reaktionsführungen angewendet wurden; die hochselektive Natur der photochemischen Reaktionen macht sie gut geeignet für eine unabhängige Aktivierung in Gegenwart anderer Reaktionskomponenten. Die Anwendung solcher orthogonalen Reaktionen, insbesondere der photochemischen Reaktionen, für die Synthese und Modifikation von Polymeren und polymeren Materialien wird ebenfalls zusammengefasst. Hervorzuheben ist, dass die Anwendung orthogonaler chemischer Reaktionen im Vergleich zu traditionellen Syntheseverfahren zusätzliche Möglichkeiten für die Synthese moderner und funktioneller Polymermaterialien bieten kann.

关键词： Materialwissenschaft Orthogonalität Photochemie Polymerwissenschaft

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Pressure-Tunable Photonic Band Gaps in an Entropic Colloidal Crystal

arXiv

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arXiv 2018年

作者： Cersonsky, Rose K. Dshemuchadse, Julia Antonaglia, James Anders, Greg Van Glotzer, Sharon C. Macromolecular Science and Engineering Program University of Michigan Ann ArborMI48109 United States Department of Chemical Engineering University of Michigan Ann ArborMI48109 United States Department of Physics University of Michigan Ann ArborMI48104 United States Department of Materials Science and Engineering University of Michigan Ann ArborMI48109 United States Biointerfaces Institute University of Michigan Ann ArborMI48109 United States

Materials adopting the diamond structure possess useful properties in atomic and colloidal systems, and are a popular target for synthesis in colloids where a photonic band gap is possible. The desirable photonic properties of the diamond structure pose an interesting opportunity for reconfigurable matter: Can we create a colloidal crystal able to switch reversibly to and from the diamond structure? Drawing inspiration from highpressure transitions of diamond-forming atomic systems, we design a system of polyhedrally-shaped particles that transitions from diamond to a tetragonal diamond derivative upon a small pressure change. The transition can alternatively be triggered by changing the shape of the particle in-situ. We propose that the transition provides a reversible reconfiguration process for a potential new colloidal material, and draw parallels between this transition and phase behavior of the atomic transitions from which we take inspiration. Copyright © 2018, The Authors. All rights reserved.

关键词： Diamonds

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Charge Transport: Enhanced Vertical Charge Transport of Homo‐ and Blended Semiconducting Polymers by Nanoconfinement (Adv. Mater. 10/2020)

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Advanced Materials 2020年第10期32卷

作者： Jongkuk Ko Youngkeol Kim Jin Soo Kang Rüdiger Berger Hyunsik Yoon Kookheon Char The National Creative Research Initiative Center for Intelligent Hybrids The WCU Program of Chemical Convergence for Energy and Environment School of Chemical and Biological Engineering Seoul National University Seoul 08826 Korea Research Laboratory of Electronics Massachusetts Institute of Technology Cambridge MA 02139 USA Max Planck Institute for Polymer Research Ackermannweg 10 Mainz D‐55128 Germany Department of Chemical and Biomolecular Engineering Seoul National University of Science and Technology Seoul 01811 Korea

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Facile Fabrication of Conductive Paper-based Materials from Tunicate Cellulose Nanocrystals and Polydopamine-decorated Graphene Oxide

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Paper And Biomaterials 2018年第4期3卷 19-25页

作者： XiaoZhou Ma YaoYao Chen Peter R. Chang Jin Huang School of Chemistry and Chemical Engineering Joint International Research Laboratory of Bio-mass-Based Macromolecular Chemistry and Materials Southwest University Chongqing 400715 China School of Chemistry Chemical Engineering and Life Sciences Wuhan University of Technology Wuhan Hubei Province 430070 China Bioproducts and Bioprocesses National Science Program Agriculture and Agri-Food Canada 107 Science Place Saskatoon SK S7N 0X2 Canada

Conductive papers made from graphene and its derivatives are important for the development of electronic devices; however, elastomer-based matrices usually make it difficult for the conductive sheets to form continuous conductive networks. In this work, we used tunicate-derived cellulose nanocrystals （TCNC） instead of traditional elastomers as the matrix for polydopamine （PDA）-coated and reduced graphene oxide （GO） to prepare conductive paper, which, at a low concentration, were better for the formation of conductive networks from conductive sheets. It was found that the Young’s modulus of the conductive paper produced via this strategy reached as high as 7 GPa. Meanwhile, owing to the partial reduction of GO during the polymerization of dopamine, the conductivity of the conductive paper reached as high as 1.3×10-5 S/cm when the PDA-coated GO content was 1 wt%, which was much higher than the conductivity of pure GO （-4.60×10-8 S/cm）. This work provides a new strategy for preparing environmentally friendly conductive papers with good mechanical properties and low conductive fller content, which may be used to produce high-performance, low-cost electronic devices.

关键词： conductive paper tunicate cellulose nanocrystal graphene oxide polydopamine coating casting paper

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Corrigendum to “Innovative approach in sustainable agriculture: Harnessing microalgae potential via subcritical water extraction” [Environ. Technol. Innov. 36, 103797]

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Environmental Technology & Innovation 2025年 37卷

作者： Alice Ferreira Jelena Vladić Diego de Oliveira Corrêa Valéria Louzada Leal Butzke Pedro L. Martins Belina Ribeiro Cláudia Marques-dos-Santos F. Gabriel Acién Luisa Gouveia LNEG National Laboratory of Energy and Geology I.P. Bioenergy and Biorefineries Unit Estrada do Paço do Lumiar 22 Lisbon 1649-038 Portugal Forest Research Centre Associate Laboratory TERRA School of Agriculture University of Lisbon Tapada da Ajuda Lisboa 1349-017 Portugal NOVA School of Science and Technology NOVA University Lisbon Caparica 2829-516 Portugal Departamento de Bioquímica e Biologia Molecular Universidade Federal do Paraná (UFPR) PO Box 19046 Curitiba Paraná CEP 81531-980 Brazil Postgraduate Program in Environmental Technology University of Santa Cruz do Sul (UNISC) Santa Cruz do Sul Rio Grande do Sul Brazil Chemical Engineering Department University of Almeria Ctra. Sacramento s/n Almería 04120 Spain GreenCoLab Green Ocean Technologies and Products Collaborative Laboratory University of Algarve Campus de Gambelas Faro 8005-139 Portugal

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The diamine cation is not a chemical example : Where density functional theory fails

arXiv

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arXiv 2018年

作者： Ali, Zulfikhar A. Aquino, Fredy W. Wong, Bryan M. Department of Physics & Astronomy University of California-Riverside RiversideCA92521 United States Department of Chemical & Environmental Engineering and Materials Science & Engineering Program University of California-Riverside RiversideCA92521 United States

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Self-twisting for macrochirality from an achiral asterisk molecule with fluorescence-phosphorescence dual emission

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Chinese chemical Letters 2017年第11期28卷 2151-2154页

作者： Hongwei Wua Bin Wu Xiyuan Yu Pei Zhao Wenbo Chen Liangliang Zhu State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai Key Lab of Polymer and Electrical Insulation School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power Shanghai University of Electric Power

Understanding of the role of supramolecular chirality for tuning material optoelectronic properties has been restricted by the limited number of cases. A particular challenge is to impose supramolecular chirality onto multicolor luminescent systems that can emit in aggregation state. Here we present a self- assembly strategy from a well-selected asterisk molecule for generating supramolecular chirality with fluorescence-phosphorescence dual emission. The work takes advantages of （1） achiral chemical structure dependent peculiar self-assembly that can spontaneously undergo symmetry breaking to produce macrochirality, and （2） the assembly process can be monitored by time which due to the crystallization-driven self-assembly by self-twisting, allowing a self-progressing chiral amplification. A multicolor luminescence induced by the fluorescence-phosphorescence dual emission along with such a self-assembly behavior was also observed at a single solution system versus the time. The self-twisting chiral self-assembly fashion provides new prospects for understanding the establishment of nanochirality from achiral molecular building blocks.

关键词： Achiral molecules self-twisting Macrochirality Fluorescence-phosphorescence Dual emission

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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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Hearing loss prevalence and years lived with disability, 1990-2019: Findings from the Global Burden of Disease Study 2019

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The Lancet 2021年第10278期397卷 996-1009页

作者： Haile, Lydia M. Kamenov, Kaloyan Briant, Paul Svitil Orji, Aislyn U. Steinmetz, Jaimie D. Abdoli, Amir Abdollahi, Mohammad Abu-Gharbieh, Eman Afshin, Ashkan Ahmed, Haroon Rashid, Tarik Ahmed Akalu, Yonas Alahdab, Fares Alanezi, Fahad Mashhour Alanzi, Turki M. Al Hamad, Hanadi Ali, Liaqat Alipour, Vahid Al-Raddadi, Rajaa M. Amu, Hubert Arabloo, Jalal Arab-Zozani, Morteza Arulappan, Judie Ashbaugh, Charlie Atnafu, Desta Debalkie Babar, Zaheer-Ud-Din Baig, Atif Amin Banik, Palash Chandra Bärnighausen, Till Winfried Barrow, Amadou Bender, Rose G. Bhagavathula, Akshaya Srikanth Bhardwaj, Nikha Bhardwaj, Pankaj Bibi, Sadia Bijani, Ali Burkart, Katrin Cederroth, Christopher R. Charan, Jaykaran Choudhari, Sonali Gajanan Chu, Dinh-Toi Couto, Rosa A.S. Dagnew, Amare Belachew Dagnew, Baye Dahlawi, Saad M.A. Dai, Xiaochen Dandona, Lalit Dandona, Rakhi Desalew, Assefa Dhamnetiya, Deepak Dhimal, Mandira Lamichhane Dhimal, Meghnath Doyle, Kerrie E. Duncan, Bruce B. Ekholuenetale, Michael Filip, Irina Fischer, Florian Franklin, Richard Charles Gaidhane, Abhay Motiramji Gaidhane, Shilpa Gallus, Silvano Ghamari, Farhad Ghashghaee, Ahmad Ghozali, Ghozali Gilani, Syed Amir Glǎvan, Ionela-Roxana Golechha, Mahaveer Goulart, Barbara Niegia Garcia Gupta, Veer Bala Gupta, Vivek Kumar Hamidi, Samer Hammond, Billy Randall Hay, Simon I. Hayat, Khezar Heidari, Golnaz Hoffman, Howard J. Hopf, Kathleen Pillsbury Hosseinzadeh, Mehdi Househ, Mowafa Hussain, Rabia Hwang, Bing-Fang Iavicoli, Ivo Ibitoye, Segun Emmanuel Ilesanmi, Olayinka Stephen Irvani, Seyed Sina Naghibi Islam, Sheikh Mohammed Shariful Iwagami, Masao Jacob, Louis Jayapal, Sathish Kumar Jha, Ravi Prakash Jonas, Jost B. Kalhor, Rohollah Al-Salihi, Nawzad Kameran Kandel, Himal Kasa, Ayele Semachew Kayode, Gbenga A. Khalilov, Rovshan Khan, Ejaz Ahmad Khatib, Mahalaqua Nazli Kosen, Soewarta Koyanagi, Ai Kumar, G. Anil Landires, Ivan Lasrado, Savita Lim, Stephen S. Liu, Xuefeng Lobo, Stany W. Lugo, Alessandra Makki, Alaa Mendoza, Walter Mersha, Amanual Getnet Mihretie, Kebadnew Mulatu Institute for Health Metrics and Evaluation University of Washington Seattle WA United States Department of Noncommunicable Diseases World Health Organization (WHO) Geneva Switzerland Department of Parasitology and Mycology Jahrom University of Medical Sciences Jahrom Iran The Institute of Pharmaceutical Sciences (TIPS) Tehran University of Medical Sciences Tehran Iran School of Pharmacy Tehran University of Medical Sciences Tehran Iran Clinical Sciences Department University of Sharjah Sharjah United Arab Emirates Department of Health Metrics Sciences School of Medicine University of Washington Seattle WA United States Department of Biosciences COMSATS Institute of Information Technology Islamabad Pakistan Department of Computer Science and Engineering University of Kurdistan Hewler Erbil Iraq Department of Medical Physiology University of Gondar Gondar Ethiopia Mayo Evidence-based Practice Center Mayo Clinic Foundation for Medical Education and Research Rochester MN United States Imam Abdulrahman Bin Faisal University Dammam Saudi Arabia Health Information Management and Technology Department Dammam Saudi Arabia Geriatric and Long Term Care Department Hamad Medical Corporation Doha Qatar Rumailah Hospital Hamad Medical Corporation Doha Qatar Department of Biological Sciences National University of Medical Sciences (NUMS) Rawalpindi Pakistan Health Management and Economics Research Center Tehran Iran Department of Community Medicine King Abdulaziz University Jeddah Saudi Arabia Department of Population and Behavioural Sciences University of Health and Allied Sciences Ho Ghana Social Determinants of Health Research Center Birjand University of Medical Sciences Birjand Iran Department of Maternal and Child Health Sultan Qaboos University Muscat Oman Department of Health System and Health Economics Bahir Dar University Bahir Dar Ethiopia Department of Pharmacy University of Huddersfield Huddersfield United Kingdom Unit of Biochemistry Universiti

Background: Hearing loss affects access to spoken language, which can affect cognition and development, and can negatively affect social wellbeing. We present updated estimates from the Global Burden of Disease (GBD) study on the prevalence of hearing loss in 2019, as well as the condition's associated disability. Methods: We did systematic reviews of population-representative surveys on hearing loss prevalence from 1990 to 2019. We fitted nested meta-regression models for severity-specific prevalence, accounting for hearing aid coverage, cause, and the presence of tinnitus. We also forecasted the prevalence of hearing loss until 2050. Findings: An estimated 1·57 billion (95% uncertainty interval 1·51–1·64) people globally had hearing loss in 2019, accounting for one in five people (20·3% [19·5–21·1]). Of these, 403·3 million (357·3–449·5) people had hearing loss that was moderate or higher in severity after adjusting for hearing aid use, and 430·4 million (381·7–479·6) without adjustment. The largest number of people with moderate-to-complete hearing loss resided in the Western Pacific region (127·1 million people [112·3–142·6]). Of all people with a hearing impairment, 62·1% (60·2–63·9) were older than 50 years. The Healthcare Access and Quality (HAQ) Index explained 65·8% of the variation in national age-standardised rates of years lived with disability, because countries with a low HAQ Index had higher rates of years lived with disability. By 2050, a projected 2·45 billion (2·35–2·56) people will have hearing loss, a 56·1% (47·3–65·2) increase from 2019, despite stable age-standardised prevalence. Interpretation: As populations age, the number of people with hearing loss will increase. Interventions such as childhood screening, hearing aids, effective management of otitis media and meningitis, and cochlear implants have the potential to ameliorate this burden. Because the burden of moderate-to-complete hearing loss is concentrated in countries with low health-ca

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chemical oxygen demand (COD) degradation of herbal, tofu and fertilizer wastewater using UV/Ozone oxidation methods

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Journal of Physics: Conference Series 2019年第1期1217卷

作者： Hadiyanto Silviana N PAdetya M E Pratiwi A D Aripratama Center of Biomass and Renewable Energy (CBIORE) Chemical Engineering Department Faculty of Engineering Diponegoro University Master Program of Environmental Science School of Postgraduate Studies Diponegoro University

The herbal, tofu and fertilizer industries contribute considerable waste. Unprocessed waste disposal can cause environmental pollution. The waste contains chemical oxygen demands (COD), and organic substances can be degraded by Advanced Oxidation Processes (AOPs) degradation method. The process of AOPs in this study used a combination of UV rays and ozone to produce hydroxyl radicals. This study was aimed to investigate the effect of UV, Ozone and UV-Ozone methods on COD degradation of herbal waste, tofu, and fertilizer. The result showed that the optimum degradation was obtained at experiment by using UV/ozone method. The COD degradation at tofu wastewater was from 1308 to 942 ppm, herbal wastewater was from 1011 to 414 ppm, and fertilizer wastewater was from 510 to 89 ppm by the use of 4 hours UV-Ozone method.

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