Article
Polymer Science
Wenjin Wu, Han Yang, Jiakang Liu, Yiqian Luo, Guanhuan Mo, Zhigao Hu, Lidong Zhang, Kun Huang
Summary: A facile method for producing recyclable polyamide materials is developed by constructing linear polymer chains through a Schiff base reaction and crosslinking them with bismaleimide. The resulting polyamide material, GF-BMs, exhibits high tensile strength and good solvent resistance. The presence of thermally reversible Diels-Alder covalent bonds and dynamic imine bonds in the polymer network enables fast reprocessing, self-healing, and recyclability, offering a new idea for recyclable materials.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Masao Ohashi, Dan Tan, Jiayan Lu, Cooper S. Jamieson, Daiki Kanayama, Jiahai Zhou, K. N. Houk, Yi Tang
Summary: The synthesis of cis-decalin structures using [4 + 2] cycloaddition with high stereoselectivity is challenging. In this study, we investigated the biosynthetic pathway of the fungal natural product fischerin (1) and identified a novel pericyclase, FinI, which catalyzes this reaction. The cocrystal structure of FinI, a predicted O-methyltransferase, with the product and SAM provides valuable insights into the natural formation of cis-decalin.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Daixuan Zhang, Foad Vashahi, Erfan Dashtimoghadam, Xiaobo Hu, Claire J. J. Wang, Jessica Garcia, Aleksandra V. V. Bystrova, Mohammad Vatankhah-Varnoosfaderani, Frank A. A. Leibfarth, Sergei S. S. Sheiko
Summary: The inability to re-process thermosets hinders their utility and sustainability. An ideal material should combine closed-loop recycling and upcycling capabilities. This trait is realized in polydimethylsiloxane bottlebrush networks using thermoreversible Diels-Alder cycloadditions to enable both reversible disassembly into a polymer melt and on-demand reconfiguration to an elastomer of either lower or higher stiffness. The crosslink density was tuned by loading the functionalized networks with a controlled fraction of dormant crosslinkers and crosslinker scavengers, such as furan-capped bis-maleimide and anthracene, respectively. The resulting modulus variations precisely followed the stoichiometry of activated furan and maleimide moieties, demonstrating the lack of side reactions during reprocessing. The presented circularity concept is independent from the backbone or side chain chemistry, making it potentially applicable to a wide range of brush-like polymers.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Organic
Julia O. Strelnikova, Alexander N. Koronatov, Nikolai Rostovskii, Alexander F. Khlebnikov, Olesya Khoroshilova, Mariya A. Kryukova, Mikhail S. Novikov
Summary: The domino reaction catalyzed by Rh-2(Piv)(4) leads to the formation of N-sulfonylated (Z)-2-(2-aminovinyl)imidazoles, providing a direct and flexible access to the desired compounds.
Article
Chemistry, Organic
Yan Jiang, Hao-Jie Ma, Xue-Long Wang, Yi Yang
Summary: A Yb(OTf)(3)-catalyzed formal (4 + 3) cycloaddition reaction was successfully achieved using donor-acceptor cyclopropanes and 3-benzylideneindoline-2-thiones as reactants. Functionalized 5,10-dihydro-2H-thiepino[2,3-b]indole derivatives were synthesized with good yields and moderate to good diastereoselectivity. This reaction represents the first (4 + 3) cycloaddition of 3-benzylideneindoline-2-thiones.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Organic
Nan-Fang Mo, Ying Zhang, Zheng-Hui Guan
Summary: An asymmetric organocatalyzed three-component Povarov reaction has been developed to construct azaspirocycles. A chiral phosphoric acid catalyst with a unique structure was highly efficient in the reaction, leading to a wide range of azaspirocycles in high yields and excellent enantioselectivities. This reaction has expanded the scope of the traditional Povarov reaction.
Article
Chemistry, Organic
Gary L. Points, Christopher M. Beaudry
Summary: Substituted carbazoles are efficiently synthesized from 3-triflato-2-pyrones and alkynyl anilines, allowing for multiple substituents with complete control of regiochemistry, resulting in complex substitution patterns. This strategy can also be applied to prepare substituted bicarbazoles and related biaryls, and has been demonstrated in the synthesis of the carbazole natural product clausine C.
Article
Chemistry, Organic
Tao Wang, Wen-Bin Wang, Yan-Ming Fu, Cheng-Feng Zhu, Lan-Jun Cheng, Yang-En You, Xiang Wu, You-Gui Li
Summary: An asymmetric double oxidative [3 + 2] cycloaddition is reported, which generates highly functionalized chiral CF3-containing spiro[pyrrolidin-3,2'-oxindole] with four contiguous stereocenters stereoselectively. This method directly constructs two C-C bonds from four C(sp3)-H bonds, and it features mild conditions, broad substrate scope, and excellent functional group compatibility.
Article
Chemistry, Organic
Yan Jiang, Hao-Jie Ma, Xue-Long Wang, Yi Yang
Summary: A new compound was synthesized successfully in this study by using Yb-(OTf)(3) catalyst to react donor-acceptor cyclopropanes with sulfur-containing 4π components. The reaction showed high yields and moderate to good diastereoselectivity.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Marlene Fadel, Erick M. Carreira
Summary: The first total synthesis of (+)-pedrolide, a tigliane-derived diterpenoid featuring an unprecedented 5-5-6-6-3 carbon skeleton, was achieved. A key step in the synthesis involved the construction of the bicyclo[2.2.1]heptane core via an intramolecular cyclopentadiene-Diels-Alder cycloaddition. A norbornadiene was used as a surrogate for cyclopentadiene, and the unmasking of the cyclopentadiene was achieved through a complex Diels-Alder reaction cascade. This synthesis also provided a novel approach to a densely functionalized carane in an efficient and enantioselective manner.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Changhong Lin, Huan Ge, Puyou Ying, Tianle Wang, Min Huang, Ping Zhang, Tao Yang, Jianbo Wu, Vladimir Levchenko
Summary: Shape-stable phase change materials (SSPCMs) were synthesized using a polyurethane network containing Diels-Alder bonds as the enclosure compound to obtain the encapsulation of polyethylene glycol (PEG). The SSPCMs-3 sample (300 wt % PEG) showed the best comprehensive performance with an enthalpy value of 171.7 J/g and no leakage at 80 degrees C for 1 h. Furthermore, the structure, crystallization behavior, and phase transition ability of SSPCMs remained unchanged after multiple thermal cycling and reprocessing.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Chemistry, Organic
Kseniya A. Alekseeva, Maryana A. Nadirova, Vladimir P. Zaytsev, Evgeniya V. Nikitina, Mikhail S. Grigoriev, Anton P. Novikov, Irina A. Kolesnik, Bernhard Mayer, Thomas J. J. Mueller, Fedor I. Zubkov
Summary: Diversely substituted, partially saturated benzo-[f]-isoindole-4-carboxylic acids were synthesized through a new three-component reaction. The reaction showed high regio- and stereoselectivity, resulting in the formation of a chiral center and a diastereoisomer.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Organic
Po Yuan, Tanja Gaich
Summary: In this study, we reported a synthetic method for the enantioselective and convergent total synthesis of (+)-pepluanol A, a natural product with a structurally intriguing skeleton. The method achieved high diastereoselectivity and convergency through key reactions for constructing the unique framework.
Article
Chemistry, Multidisciplinary
Heng-Zhi Tian, Qing-Gang Tang, Guo-Qiang Lin, Xing-Wen Sun
Summary: A novel approach to synthesize chiral 1,2-oxazinane spirocyclic scaffolds by organocatalytic [4 + 2] cycloaddition reaction has been developed. In addition, a hydrazide 1,4-synthon is synthesized to construct chiral hexahydropyridazin spirocyclic scaffolds. Both reactions exhibit good to excellent yield, diastereoselectivity, and enantioselectivity.
Review
Chemistry, Multidisciplinary
Lucas L. Fluegel, Thomas R. Hoye
Summary: The HDDA reaction is a thermal cyclization process that generates highly functionalized benzenoid products, attracting attention for its versatility and customizable nature among researchers.
Article
Materials Science, Composites
Jingjing Chen, Kaiju Luo, Jing Zhu, Junrong Yu, Yan Wang, Zuming Hu
COMPOSITES SCIENCE AND TECHNOLOGY
(2019)
Article
Polymer Science
Sihan Li, Jing Zhu, Junrong Yu, Yan Wang, Zuming Hu
JOURNAL OF APPLIED POLYMER SCIENCE
(2019)
Article
Materials Science, Multidisciplinary
Shuai Kang, Shiya Qiao, Zuming Hu, Junrong Yu, Yan Wang, Jing Zhu
JOURNAL OF MATERIALS SCIENCE
(2019)
Article
Chemistry, Physical
Shuai Kang, Wei Zhang, Zuming Hu, Junrong Yu, Yan Wang, Jing Zhu
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Engineering, Environmental
Xingke Zhang, Na Li, Zuming Hu, Junrong Yu, Yan Wang, Jing Zhu
CHEMICAL ENGINEERING JOURNAL
(2020)
Article
Engineering, Chemical
Jiayou Quan, Hongqiu Wang, Ting Li, Lianlian Fan, Junrong Yu, Yan Wang, Jing Zhu, Zuming Hu
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2020)
Article
Engineering, Manufacturing
Xiaoxu Xie, Hong Huang, Jing Zhu, Junrong Yu, Yan Wang, Zuming Hu
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2020)
Article
Engineering, Chemical
Jing Li, Junrong Yu, Yan Wang, Jing Zhu, Zuming Hu
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2020)
Article
Nanoscience & Nanotechnology
Shuai Kang, Shiya Qiao, Yutong Cao, Zuming Hu, Junrong Yu, Yan Wang, Jing Zhu
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Materials Science, Multidisciplinary
Yiman Xu, Xiaoxu Xie, Hong Huang, Yan Wang, Junrong Yu, Zuming Hu
Summary: The reported fiber strain sensor, based on TPU layer encapsulation, demonstrates stable sensing performance and high sensitivity for wearable electronics, even though the large-scale fabrication of such sensors remains a challenge. It shows high sensitivity, conductivity, and stability, while being able to monitor various human motions, providing a good candidate for next-generation intelligent wearable devices.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Polymer Science
Tianmeng Liu, Hong Huang, Yan Wang, Junrong Yu, Zuming Hu
Summary: This study reports the preparation and characterizations of a metal coordination bonds crosslinked polybenzimidazole (PBI) network, achieving efficient strengthening and toughening of high-performance aromatic polymers. The research also demonstrates the chemical recycling of PBI from crosslinked network and the development of novel high-temperature resistant or high-temperature rewritable anti-counterfeiting films based on Cu2+ crosslinked PBI, indicating potential for design principles in future supramolecularly crosslinked and recyclable high-performance polymers.
MACROMOLECULAR RAPID COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Tianmeng Liu, Shuqiang Xiong, Qinchao Sun, Junrong Yu, Yan Wang, Zuming Hu
Summary: We report a novel method for the continuous spinning of high-performance and recyclable aerogel fibers by utilizing the coordination property changes of imidazole ligands and different redox states of cobalt ions. The obtained aerogel fibers demonstrate a homogeneous microporous structure, high mechanical strength, low thermal conductivity, excellent thermal stability, and flame resistance. Stretching treatment prior to drying significantly improves the mechanical properties of the aerogel fibers. The non-covalent crosslinking allows for the recycling of the aerogel fibers.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yiping Lu, Jun Wu, Wenjiang Chen, Hu Pan, Yuan Wang, Shumei Gao, Huichen Dong, Yan Wang, Jin Zhou, Hong Huang
Summary: This article introduces a quasi-bilayered, multi-responsive, and patternable actuator composed of Fe3O4-decorated graphene oxide and polyvinylidene fluoride, which can stably respond to multiple stimuli including infrared light and acetone vapor under a magnetic field.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Shiya Qiao, Shuai Kang, Jing Zhu, Yan Wang, Junrong Yu, Zuming Hu
Summary: This study prepared pre-oxidized polyacrylonitrile/polyimide (OPAN/PI) composite aerogels with good thermal stability and mechanical properties through a simple synergistic strategy. The obtained material exhibited excellent resilience, low thermal conductivity, high filtration efficiency for particulate matter, and high dust-holding capacity, showing great potential in high temperature filtration, heat insulation, and flame retardant applications.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Materials Science, Multidisciplinary
Kaiju Luo, Guocheng Song, Yan Wang, Junrong Yu, Jing Zhu, Zuming Hu
ACS APPLIED POLYMER MATERIALS
(2019)
Article
Polymer Science
Yuanzhang Jiang, Xuyi Wang, Yanting Han, Dakai Gong, Yingchun Gu, Lin Tan
Summary: In this study, FeCl3 and poly(acrylic acid) (PAA) were doped into waterborne polyurethanes (WPUs) to create multifunctional materials with self-healing and antimicrobial properties. WPU/Fe/PAA-5.5, containing 5.5 wt % PAA, exhibited excellent mechanical properties, strong self-healing capabilities, and an impressive antimicrobial rate of over 90%. These supramolecular films were also highly recyclable through hot-pressing.
Article
Polymer Science
Longyu Tian, Min Wang, Guangming Liao, Baoliang Liu, Sujuan Zhang, Yucheng Sun, Zhen Meng, Jintao Zhang, Zaijun Lu
Summary: Two kinds of benzoxazine monomers were synthesized and used to prepare polybenzoxazine anion exchange membranes (AEMs) with quaternary ammonium functionalization. The LQPBZ AEM exhibited better ion conductivity and alkaline stability.
Article
Polymer Science
Claire A. Lemarchand
Summary: This study investigates the shock behavior of three different polymers through molecular dynamics simulations. The results reveal specificities in the shock behavior of polymers, including deviations from the linear relation between shock velocity and particle velocity, as well as differences in shear stress relaxation behind the shock front. It is found that the deviation of the Hugoniot locus is related to the change in the relative contribution of bonding and non-bonding potential energies, while polymers with higher glass transition temperatures exhibit slower shear stress relaxation.
Article
Polymer Science
Zengquan Liu, Xiaochun Yin, He Zhang, Shuo Gao, Qinglin Kuang, Yanhong Feng
Summary: A powder solid-state extension (PSSE) technology was proposed to address the high melt viscosity issue of UHMWPE. By uniaxial extension and sintering in the solid state, a highly self-reinforced material was prepared. X-ray diffraction and scattering techniques were used to study the structural evolution during the PSSE process, and a solid-phase induced transformation model was established.
Article
Polymer Science
Zhike Li, Anyu Luo, Rui Zhou, Xin Li, Haiyan Li
Summary: A novel high temperature resistance IL@SiO2 nanocapsules were successfully prepared and their friction and wear properties in PA6 composites were studied. The addition of IL@SiO2 nanocapsules reduced the friction coefficient and wear rate without affecting the mechanical properties of PA6. The synergy between the IL core and SiO2 wall in the nanocapsules improved the self-lubricating performance of the PA6 composites.
Article
Polymer Science
Xin Liu, Xuhong Guo, Qi Liao
Summary: In this study, an algorithm for accurately estimating viscosity is developed using molecular dynamics simulations and the Green-Kubo formula. This algorithm can be applied to complex systems with long correlations, such as macromolecular and biological simulation systems.
Article
Polymer Science
Hao Pu, Yun-Lei Hou, Jing -Zhou Chen, Dong -Lin Zhao
Summary: The use of modified graphene improves the interfacial adherence of carbon fibers to epoxy resin, resulting in enhanced interfacial and bending properties of CF and matrix in CF/EP composites, as well as increased interlaminar shear strength and flexural strength.
Article
Polymer Science
Wei-Chung Ke, Jin-Wei Lin, Manohar Reddy Busireddy, Yueh-Hsing Lee, Jiun-Tai Chen, Chain-Shu Hsu
Summary: This study introduces a crosslinkable monomer, TAIC, to synthesize three crosslinked polyimide films, which exhibit improved thermal, mechanical, and dielectric properties. The introduction of TAIC enhances the tensile strength, reduces the dielectric constant and dielectric loss, and decreases the coefficient of thermal expansion of the polyimide films.
Article
Polymer Science
Alex Kwasi Kumi, Ruiling Fan, Ye Chen, Yumei Zhang
Summary: The difference in leaching of amylopectin from cellulose/amylopectin/1-butyl-3-methylimidazolium chloride ([Bmim][Cl]) blends during regeneration in water and aqueous ethanol has been studied. Molecular dynamics simulations showed that the dissolution and regeneration mechanisms of amylopectin in [Bmim][Cl] are similar to cellulose in ionic liquids. Water regeneration leads to weak electrostatic interactions, resulting in high leaching of amylopectin. In contrast, ethanol-water interactions enhance electrostatic interactions among amylopectin chains, limiting amylopectin leaching in aqueous ethanol.
Article
Polymer Science
Xi Zeng, Junwei Zhou, Junbiao Peng, Chunsheng Zhang, Danling Wang, Yihu Song, Qiang Zheng
Summary: This study utilizes an oligomer deep eutectic solvent (DES) based on polyethylene glycol to regulate the vulcanization kinetics of rubber. The results show that the DES can accelerate vulcanization at low temperatures without affecting the crosslinking density and Mullins effect.
Article
Polymer Science
Qianqian Yue, Yongfei Peng, Xingjian Liu, Aihua He, Huarong Nie
Summary: The addition of metal deactivators can effectively suppress the aging of TBIR, prolong its lifespan, and have no negative effects on its physical and processing properties. These research findings are of great importance for improving the stability and aging resistance of polymers.
Article
Polymer Science
J. Gomez-Caturla, J. Ivorra-Martinez, R. Tejada-Oliveros, V Moreno, D. Garcia-Garcia, R. Balart
Summary: This work focuses on the development of environmentally friendly PLA formulations by using different esters derived from geraniol as plasticizers. The results show that these esters have good compatibility with PLA, and they can effectively enhance the elongation and plasticity of PLA, reduce its glass transition temperature, and slightly improve its water absorption capabilities.
Article
Polymer Science
Dandan Li, Zhaohui Lu, Zhao Ke, Ke Xu, Fengna Dai, Youhai Yu, Guangtao Qian, Chunhai Chen
Summary: In this study, cross-linked PI aerogel membranes with low dielectric constant and high moisture resistance were prepared by co-polymerization and scraping coating technology. The incorporation of fluorinated blocks and benzimidazole ring structures resulted in novel PI aerogel membranes with fascinating dielectric properties and outstanding moisture resistance.
Article
Polymer Science
Zhaoyang Chu, Qing Zhang, Haihua Luo, Han Zhou, Fapei Zhang, Wei Chen, Wenhua Zhang
Summary: Multi-physical fields solution processing strategy is a universal and facile method for preparing various conjugated polymer films and high-performance devices. In this study, we employed a combined microfluidic flow and ultrasonication strategy (FU) for processing CP solutions, and found a pronounced synergetic effect in promoting the pre-ordering of chains in solution. The conformation order and anisotropy of the solution were revealed through various characterizations. A non-classical nucleation model for polymer crystallization in non-equilibrium solution processing was confirmed. The roles of microfluidic flow and ultrasonication in chain aggregation and crystallization were addressed through multi-physical simulations. Compared to pristine solutions, the FU strategy showed improved solution anisotropy and crystallization kinetics, resulting in higher crystallinity in films and increased mobilities in OFET devices. The FU processing strategy provides a universal approach for regulating chain conformation and aggregation in conjugated polymer solutions.
