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Tan Y, Deng J, Gao H, Feng Z, Lu L, Wang J, Pan Z, Yao L, Deng Q. Research on the energy storage performance of laminated composites based on multidimensional co-design in a broad temperature range. NANOSCALE 2024; 16:8455-8461. [PMID: 38577747 DOI: 10.1039/d4nr00189c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/06/2024]
Abstract
Polymer dielectrics play an irreplaceable role in electronic power systems because of their high power density and fast charge-discharge capability, but it is limited by their low stability in the temperature range of 25-200 °C. Rather than the introduction of one-dimensional fillers in polymers, we used a kind of multidimensional synergistic design to prepare Al2O3-TiO2-Al2O3/PI composites with layered structures by introducing multi-dimensional materials in polyimide (PI). In fact, the composite achieves much higher temperature stability than the pure PI film. The optimally proportioned composite has an energy density of 3.41 J cm-3 (vs. 1.48 J cm-3 for pure PI) even at 200 °C. Additionally, it reaches an impressive energy density retention of up to 90% and maintains an energy efficiency as high as 86% at 400 MV m-1 in the temperature range of 25-200 °C. The multidimensional coordination design is proposed to obtain composite films, and provides a feasible strategy in the study of polymer-based composites with high-temperature performance.
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Affiliation(s)
- Yipeng Tan
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, P. R. China.
- Research Center for Advanced Information Materials, Huangpu Research & Graduate School of Guangzhou University, Guangzhou 510275, China
| | - Jiayu Deng
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, P. R. China.
| | - Hang Gao
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, P. R. China.
- Research Center for Advanced Information Materials, Huangpu Research & Graduate School of Guangzhou University, Guangzhou 510275, China
| | - Ziwen Feng
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, P. R. China.
- Research Center for Advanced Information Materials, Huangpu Research & Graduate School of Guangzhou University, Guangzhou 510275, China
| | - Linfei Lu
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, P. R. China.
- Joint Institute of Guangzhou University & Institute of Corrosion Science and Technology, Guangzhou University, Guangzhou 510275, China
- Research Center for Advanced Information Materials, Huangpu Research & Graduate School of Guangzhou University, Guangzhou 510275, China
| | - Jiheng Wang
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, P. R. China.
| | - Zhongbin Pan
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
| | - Lingmin Yao
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, P. R. China.
- Joint Institute of Guangzhou University & Institute of Corrosion Science and Technology, Guangzhou University, Guangzhou 510275, China
- Research Center for Advanced Information Materials, Huangpu Research & Graduate School of Guangzhou University, Guangzhou 510275, China
| | - Qinglin Deng
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, P. R. China.
- Research Center for Advanced Information Materials, Huangpu Research & Graduate School of Guangzhou University, Guangzhou 510275, China
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Souto de Aquino GA, Nguyen Van Sang L, Valery R, Lanave M, Estopiñá-Durán S, Håheim KS, Ferreira SB, Sydnes MO. Photodegradable antimicrobial agents: towards structure optimization. RSC Adv 2023; 13:29729-29734. [PMID: 37822648 PMCID: PMC10563738 DOI: 10.1039/d3ra05554j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 09/29/2023] [Indexed: 10/13/2023] Open
Abstract
Antibiotic resistance continues to be an ominous threat facing human health globally and urgent action is required to limit the loss of human life. The pollution of antibiotics into the environment is one of the drivers behind the crisis. With this in mind, we have developed novel photodecomposable antimicrobial agents based on an ethanolamine scaffold, which upon photoirradiation decomposes into two major inactive fragments. Herein we describe our further work on the synthesis of novel ethanolamines with a particular focus on structure activity relationship, resulting in four new active compounds which photodecomposed into inactive fragments.
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Affiliation(s)
- Gabriel Alves Souto de Aquino
- Department of Chemistry, Bioscience and Environmental Engineering, Faculty of Science and Technology, University of Stavanger Stavanger NO-4036 Norway
- Department of Organic Chemistry, Chemistry Institute, Federal University of Rio de Janeiro Rio de Janeiro 21949-900 Brazil
| | - Liza Nguyen Van Sang
- Department of Chemistry, Bioscience and Environmental Engineering, Faculty of Science and Technology, University of Stavanger Stavanger NO-4036 Norway
| | - Romane Valery
- Department of Chemistry, Bioscience and Environmental Engineering, Faculty of Science and Technology, University of Stavanger Stavanger NO-4036 Norway
| | - Maëlys Lanave
- Department of Chemistry, Bioscience and Environmental Engineering, Faculty of Science and Technology, University of Stavanger Stavanger NO-4036 Norway
| | - Susana Estopiñá-Durán
- Department of Chemistry, Bioscience and Environmental Engineering, Faculty of Science and Technology, University of Stavanger Stavanger NO-4036 Norway
| | - Katja S Håheim
- Department of Chemistry, Bioscience and Environmental Engineering, Faculty of Science and Technology, University of Stavanger Stavanger NO-4036 Norway
| | - Sabrina Baptista Ferreira
- Department of Organic Chemistry, Chemistry Institute, Federal University of Rio de Janeiro Rio de Janeiro 21949-900 Brazil
| | - Magne O Sydnes
- Department of Chemistry, Bioscience and Environmental Engineering, Faculty of Science and Technology, University of Stavanger Stavanger NO-4036 Norway
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Toda Y, Iwasaki M, Suga H. Base-mediated synthesis of cyclic dithiocarbamates from 1-amino-3-chloropropan-2-ol derivatives and carbon disulfide. Org Biomol Chem 2023; 21:6293-6297. [PMID: 37486165 DOI: 10.1039/d3ob01070h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
Abstract
An efficient method for the preparation of six-membered cyclic dithiocarbamates is described, in which triethylamine effectively promotes the reaction of 1-amino-3-chloropropan-2-ol derivatives with carbon disulfide. On the basis of the experimental and theoretical studies, a reaction mechanism is proposed to explain the difference between the present reaction and our previously reported carbon dioxide fixation.
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Affiliation(s)
- Yasunori Toda
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan.
| | - Masaya Iwasaki
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan.
| | - Hiroyuki Suga
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan.
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Progress on the Stereoselective Synthesis of Chiral Molecules Based on Metal-Catalyzed Dynamic Kinetic Resolution of Alcohols with Lipases. Symmetry (Basel) 2021. [DOI: 10.3390/sym13091744] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Metal/lipase-combo catalyzed dynamic kinetic resolution (DKR) of racemic chiral alcohols is a general and practical process to obtain the corresponding enantiopure esters R with quantitative conversion. The use of known Ru-catalysts as well as newly developed homogeneous and heterogeneous metal catalysts (Fe, V) contributed to make the DKR process more sustainable and to expand the substrate scope of the reaction. In addition to classical substrates, challenging allylic alcohols, tertiary alcohols, C1-and C2-symmetric biaryl diols turned out to be competent substrates. Synthetic utility further emerged from the integration of this methodology into cascade reactions leading to linear/cyclic chiral molecules with high ee through the formation of multiple bonds, in a one-pot procedure.
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Kinens A, Balkaitis S, Ahmad OK, Piotrowski DW, Suna E. Acylative Dynamic Kinetic Resolution of Secondary Alcohols: Tandem Catalysis by HyperBTM and Bäckvall's Ruthenium Complex. J Org Chem 2021; 86:7189-7202. [PMID: 33974415 DOI: 10.1021/acs.joc.1c00545] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Non-enzymatic dynamic kinetic resolution (DKR) of secondary alcohols by enantioselective acylation using an isothiourea-derived HyperBTM catalyst and racemization of slowly reacting alcohol by Bäckvall's ruthenium complex is reported. The DKR approach features high enantioselectivities (up to 99:1), employs easy-to-handle crystalline 4-nitrophenyl isobutyrate as the acylating reagent, and proceeds at room temperature and under an ambient atmosphere. The stereoinduction model featuring cation-π system interactions between the acylated HyperBTM catalyst and π electrons of an alcohol aryl subunit has been elaborated by DFT calculations.
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Affiliation(s)
- Artis Kinens
- Latvian Institute of Organic Synthesis, Aizkraukles 21, Riga LV-1006, Latvia.,Department of Chemistry, University of Latvia, Jelgavas 1, Riga LV-1004, Latvia
| | - Simonas Balkaitis
- Latvian Institute of Organic Synthesis, Aizkraukles 21, Riga LV-1006, Latvia.,Department of Chemistry, University of Latvia, Jelgavas 1, Riga LV-1004, Latvia
| | - Omar K Ahmad
- Worldwide Medicinal Chemistry, Pfizer, Inc., Eastern Point Road, Groton, Connecticut 06340, United States
| | - David W Piotrowski
- Worldwide Medicinal Chemistry, Pfizer, Inc., Eastern Point Road, Groton, Connecticut 06340, United States
| | - Edgars Suna
- Latvian Institute of Organic Synthesis, Aizkraukles 21, Riga LV-1006, Latvia.,Department of Chemistry, University of Latvia, Jelgavas 1, Riga LV-1004, Latvia
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Tamaddon F, Arab D. Urease covalently immobilized on cotton-derived nanocellulose-dialdehyde for urea detection and urea-based multicomponent synthesis of tetrahydro-pyrazolopyridines in water. RSC Adv 2019; 9:41893-41902. [PMID: 35541594 PMCID: PMC9076516 DOI: 10.1039/c9ra05240b] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 11/26/2019] [Indexed: 01/30/2023] Open
Abstract
The urease Schiff-base covalently bonded to the designed high-content nanocellulosedialdehyde (HANCD) prepared from cotton-derived nanocellulose (NC) via tandem acid-hydrolysis and periodate-oxidation reactions was termed HANCD@urease. No change in the aldehyde content of HANCD after Schiff-base bonding to urease and similarity in the relative enzyme activities for HANCD@urease and free enzyme supported that the preparation conditions for HANCD-loaded urease are mild enough to prevent denaturation of the enzyme. As the immobilized urease showed higher stability and reusability versus free enzyme, the HANCD@urease was efficiently used to determine the urea concentration in aqueous solutions and blood serum samples. Alternatively, the catalytic efficiency of the HANCD@urease was demonstrated for the production of ammonia from urea in the multicomponent synthesis of 3,5-dimethyl-4-aryl-1,4,7,8-tetrahydrodipyrazolo[3,4-b:4′,3′-e]pyridines (THPPs) in water. This new environment-friendly urea sensor showed 90% preservation of the enzyme activity after the six cycles of reuse in enzymatic reactions, while its catalytic activity in the reaction of benzaldehyde, hydrazine hydrate, and alkyl acetoacetate with urea instead of hygroscopic ammonium salts did not change significantly after the sixth run. Detection and production of ammonia by a bio-compatible sensor and catalyst under mild conditions are features of this new green protocol. The urease Schiff-base covalently bonded to the designed high-content nanocellulosedialdehyde (HANCD) prepared from cotton-derived nanocellulose (NC) via tandem acid-hydrolysis and periodate-oxidation reactions was termed HANCD@urease.![]()
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Affiliation(s)
- Fatemeh Tamaddon
- Department of Chemistry
- Faculty of Science
- Yazd University
- Yazd 89195-741
- Iran
| | - Davood Arab
- Department of Chemistry
- Faculty of Science
- Yazd University
- Yazd 89195-741
- Iran
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