Review
Chemistry, Inorganic & Nuclear
Ling-Jo Wu, Wei Lee, Prasanna Kumar Ganta, Yu-Lun Chang, Yung -Chi Chang, Hsuan-Ying Chen
Summary: Multinuclear metal complexes can enhance the catalytic activity of ROP catalysts, but the distance between catalytic metal centers and the resonance of ligands play important roles in the catalytic reaction. This review focuses on recent studies of multinuclear metal catalysts in ROP and compares their catalytic activity with mononuclear metal catalysts.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Phong K. Quach, Jesse H. Hsu, Ivan Keresztes, Brett P. Fors, Tristan H. Lambert
Summary: The ring-opening metathesis polymerization of cyclopropenes using hydrazonium initiators was investigated. The initiators, formed by condensing 2,3-diazabicyclo[2.2.2]octane and an aldehyde, polymerize cyclopropene monomers through a sequence of [3+2] cycloaddition and cycloreversion reactions. The study showed that the monomer to initiator ratio had a positive correlation with the degree of polymerization.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Polymer Science
Zhunxuan Li, Rui Chen, Ying Wang, Linlin Zhu, Wenyi Luo, Zhen Zhang, Nikos Hadjichristidis
Summary: An efficient synthetic methodology was developed for the modification of hyperbranched polyethyleneimines (PEI) using N-sulfonyl aziridines, resulting in materials with unique fluorescence properties and the ability to remove hazardous metals.
Review
Chemistry, Applied
Nina Guy, Olivia Giani, Sebastien Blanquer, Julien Pinaud, Jean-Jacques Robin
Summary: Photopolymerization is gaining interest in both industrial and academic fields due to its high reaction kinetics, low emissions of organic solvents, and reduced shrinking stress. This method has mainly been developed for radical polymerization of vinyl monomers and to a lesser extent for ring-opening polymerization (ROP). With the emergence of new initiating systems, the photopolymerization of various cyclic monomers has expanded beyond epoxides, which were the first monomers polymerized by cationic ring-opening polymerization (CROP).
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Polymer Science
Masato Suzuki, Aya Watanabe, Raimu Kawai, Ryo Sato, Shin-ichi Matsuoka, Susumu Kawauchi
Summary: This study reports the ring-opening polymerization of thiolactide, where thiolactic acid undergoes cyclic condensation to form rac-thiolactide, which is then polymerized using a combination of thiol as initiator and DBU as catalyst. The polymerization process was found to be in equilibrium and displayed different structural characteristics and degradability compared to polylactide.
Review
Chemistry, Multidisciplinary
Xiaoqian Wang, Ziyu Huo, Xiaoyu Xie, Narasimhamurthy Shanaiah, Rong Tong
Summary: The demand to replace unsustainable polyolefins drives the transformation of renewable resources into functional and degradable polymers. However, the properties of many degradable homopolymers are inferior to commodity polyolefins, limiting their utility. One-pot synthesis of sequence-defined copolymers from cyclic monomer mixtures is attractive in terms of concept and economics, as it maximizes materials usage and improves polymer performance. Recent advances in one-pot, sequence-controlled polymerizations of cyclic monomer mixtures using a single catalytic system that combines multiple catalytic cycles are highlighted, including the scopes of cyclic monomers, catalysts, and polymerization mechanisms.
CHEMISTRY-AN ASIAN JOURNAL
(2023)
Article
Polymer Science
U. L. D. Inush Kalana, Partha P. Datta, Rukshika S. Hewawasam, Elizabeth T. Kiesewetter, Matthew K. Kiesewetter
Summary: This study discusses the H-bond mediated organocatalytic ring-opening polymerizations of four new thionolactone monomers, emphasizing the importance of organocatalysts in synthesizing thionolactone polymers and copolymers, as well as exploring the application of thionoester as a chemical handle in polymer backbone.
Review
Polymer Science
Chengjian Zhang, Xiaowei Geng, Xinghong Zhang, Yves Gnanou, Xiaoshuang Feng
Summary: Sensitivity to environmental concerns and the demand for metal-free polymeric materials have driven research towards breakthroughs in organocatalytic polymerizations. Triethyl borane (TEB) has been discovered as an exceptional Lewis acid, serving to generate ate complexes and activate epoxides. Lewis pairs consisting of alkyl boranes combined with onium salts or organic bases have demonstrated unprecedented versatility for (co)polymerizations of oxygenated monomers, producing various oxygenated polymers. This review summarizes the progress made in TEB-mediated polymerization systems and proposes future challenges in organocatalytic synthesis.
PROGRESS IN POLYMER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Dmitry S. Belov, Logesh Mathivathanan, Melanie J. Beazley, William Blake Martin, Konstantin V. Bukhryakov
Summary: The study explores the capability of an iron-based catalyst in performing ring-opening metathesis polymerization of olefins, demonstrating that the use of in situ prepared heteroleptic iron catalysts significantly enhances polymerization rate and selectivity.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Polymer Science
Yujin Cha, JiHyeon Hwang, Luis Ramos, Huina Lin, Tianyu Zhu, Chuanbing Tang
Summary: The synthesis of cyclic cobaltocenium and its application in the synthesis of high-performance copolymers have been reported.
Review
Polymer Science
Jianqun Wang, Youhua Tao
Summary: The review highlights the use of various catalysts, especially metal-based catalysts, for controlled ROP of OCAs. It also summarizes recent progress on the organocatalytic ROP of OCAs and discusses the future development of this method for sustainable polyester synthesis.
MACROMOLECULAR RAPID COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Zhen Yu, Meng Wang, Xu-Man Chen, Shuai Huang, Hong Yang
Summary: The novel macrobicyclic olefin system shows good selectivity and high stereoselectivity in ROMP, with sacrificial cleavage of the silyloxide bridge providing clean-structured, non-auxiliaried polymers.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Polymer Science
Honggang Mei, Bingjie Zhao, Huaming Wang, Sixun Zheng
Summary: The preparation of crosslinked PDCPD nanoparticles via ROMP-induced self-assembly approach was reported in this communication. The morphology of the obtained nanoparticles varied from spherical, cylindrical to planar depending on the molecular weights of Macro-CTAs, the concentrations of DCPD and the natures of solvents. The ROMPISA method provides a new and efficient approach to prepare crosslinked polymer nanoparticles.
MACROMOLECULAR RAPID COMMUNICATIONS
(2021)
Correction
Chemistry, Multidisciplinary
Emily A. Prebihalo, Anna M. Luke, Yernaidu Reddi, Christopher J. LaSalle, Vijay M. Shah, Christopher J. Cramer, Theresa M. Reineke
Summary: Correction: This study provides important theoretical guidance for the synthesis of high-performance polymer materials with special structures by the radical ring-opening polymerization of sustainably-derived thionoisochromanone.
Article
Polymer Science
Mohammad Yasir, Andreas F. M. Kilbinger
Summary: Norbornene and cyclohexene show different polymerization behaviors using Grubbs' catalysts due to their varying ring strain energy levels; a sequence-selective cascade polymerization of a monomer containing both rings resulted in polymers with moderate molecular weight dispersities and good control over molecular weight.
Article
Biochemistry & Molecular Biology
Rui Song, Xueqin Zhang, Huihui Wang, Chuanfu Liu
Summary: Polyoxometalate (POM) has great potential in oxidative desulfurization (ODS) reaction. However, its high solubility in common solvents hinders recycling, and its small specific surface area limits interaction with the substrate. In this study, cellulose nanofibrils (CNFs) were modified with APTs to provide positive charges on their surfaces, and PTA was loaded to obtain A-CNF/PTA aerogel as the ODS catalyst. The aerogel showed increased specific surface area, uniform 3D network structure, and excellent catalytic performance in ODS.
Article
Environmental Sciences
Mingjie Chen, Xincai Qiu, Weisheng Zeng, Daoli Peng
Summary: In this study, the optimal stratification approach and modeling algorithm for forest aboveground carbon density (AGC) estimation were identified through comparative analysis. The results showed that stratified estimation models, especially those based on dominant species stratification (DSS) and CatBoost algorithm, outperformed unstratified models and achieved higher estimation accuracy. The study demonstrated the positive effect of stratification and suggested the integration of this strategy with national forest inventory for improved monitoring of forest carbon stock over large areas.
Article
Biochemistry & Molecular Biology
Jin-Ming Zhang, Ming-Jie Chen, Jiong-Hui He, Ya-Ping Li, Zhi-Cai Li, Zi-Jing Ye, Yong-Hui Bao, Bing-Jun Huang, Wen-Jie Zhang, Ping Kwan, Yu-Ling Mao, Jing-da Qiao
Summary: LRP1 deficiency may be a potential candidate gene for epilepsy, and the principal ketone body of the ketogenic diet can effectively treat epilepsy caused by LRP1 deficiency.
JOURNAL OF MOLECULAR NEUROSCIENCE
(2022)
Article
Crystallography
Yuanzhao Wu, Mingjie Chen, Haohao Bai, Binjie Wang, Jiye Wang, Yazhou Qin, Weixuan Yao
Summary: In this article, hollow urchin-like Au nanocrystals were prepared using HAuCl4·3H2O and AgNO3 as precursors and ascorbic acid as the reducing agent. The prepared Au nanocrystals exhibited different surface morphologies depending on the amount of HAuCl4·3H2O used. The hollow urchin-like Au nanocrystals were characterized and used in surface-enhanced Raman spectroscopy (SERS) and photocatalytic reactions.
Article
Environmental Sciences
Nan Zhang, Mingjie Chen, Fan Yang, Cancan Yang, Penghui Yang, Yushan Gao, Yue Shang, Daoli Peng
Summary: This study utilized multiple data sources, advanced feature selection methods, and machine learning algorithms for forest height estimation, showing that the combination of multiple sensor data improved accuracy and the XGBoost algorithm outperformed others. The best model incorporating Sentinel-1, Sentinel-2, and topography metrics provided the optimal forest height estimation.
Correction
Biochemistry & Molecular Biology
Jin-Ming Zhang, Ming-Jie Chen, Jiong-Hui He, Ya-Ping Li, Zhi-Cai Li, Zi-Jing Ye, Yong-Hui Bao, Bing-Jun Huang, Wen-Jie Zhang, Ping Kwan, Yu-Ling Mao, Jing-da Qiao
JOURNAL OF MOLECULAR NEUROSCIENCE
(2023)
Article
Spectroscopy
Yazhou Qin, Shusheng Yin, Mingjie Chen, Weixuan Yao, Yingsheng He
Summary: In this study, a highly sensitive surface-enhanced Raman scattering (SERS) method was developed for detecting the opioid drug fentanyl and its analogs. By controlling the morphology of the prepared nanocrystals and performing density functional theory (DFT) calculations, the differentiation of different analogs was achieved.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Engineering, Biomedical
Mingjie Chen, Yan Li, Huiming Liu, Dandan Zhang, Qing-Shan Shi, Xin-Qi Zhong, Yanzhu Guo, Xiao-Bao Xie
Summary: Lignin, a natural aromatic polymer, has various biological activities and can be used as an environmentally friendly antimicrobial. However, its heterogeneity and ambiguous mechanism of action pose challenges in its application. This review aims to provide insights into lignin chemistry, antimicrobial activity, synthesis approaches, and applications, to inspire researchers in developing lignin antimicrobials.
MATERIALS TODAY BIO
(2023)
Article
Biochemistry & Molecular Biology
Yan Li, Mingjie Chen, Huiming Liu, Dandan Zhang, Qing-Shan Shi, Xiao-Bao Xie, Yanzhu Guo
Summary: This study synthesized aminoalkyl-modified lignins with different degrees of substitution and hydrophobicity by employing alkyldiamines as lysine mimics. The results showed that aminobutyl lignin had enhanced antimicrobial activity against S. aureus and E. coli and performed better than copper ions. The antimicrobial mechanism of action was similar to polylysine, damaging the cell membrane and causing cell death.
Article
Water Resources
Banafsheh Nematollahi, Mohammad Reza Nikoo, Nasser Talebbeydokhti, Gholamreza Rakhshandehroo, Riyadh I. Al-Raoush, Mingjie Chen
Summary: Designing reservoir outlets for effective flood management is a challenging task, and research on considering flood uncertainties in these designs is scarce. This study develops a MATLAB Toolbox application to optimize reservoir outlet designs, considering different types of outlets and uncertainties.
HYDROLOGICAL SCIENCES JOURNAL
(2023)
Article
Agricultural Engineering
Zengyong Li, Wu Lan, Chuanfu Liu
Summary: In this study, a biomass derived bifunctional catalyst (Ru/CCD-SO3H) was used to convert cassava dreg and cassava starch into sorbitol. The highest sorbitol yield of 11.43% was achieved using cassava dreg as reactant, while the maximum sorbitol yield reached 82.51% using cassava starch as reactant. A kinetic model of cassava starch degradation was performed, revealing that the cassava starch hydrolysis is the rate-determining step of cassava starch conversion into sorbitol. This research not only contributes to the comprehensive utilization of cassava dreg, but also provides valuable guidance for developing kinetic models of polysaccharide conversion.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Chemistry, Multidisciplinary
Mingjie Chen, Yanding Li, Fachuang Lu, Jeremy S. S. Luterbacher, John Ralph
Summary: The chemical complexity of lignin presents a challenge for its conversion into valuable chemicals. Understanding lignin features and plant sources that contribute to its valorization can aid in plant selection and engineering to produce lignins better suited for conversion. A study using NMR and analytical methods on 16 biomass samples identified key determinants controlling depolymerization and showed that hardwoods with specific lignin properties had higher monomer yields compared to grasses and softwoods. Lignin composition, particularly the content of the syringyl unit, greatly influenced the release of phenolic monomers.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Yueqing Wang, Mingjie Chen, Yang Yang, John Ralph, Xuejun Pan
Summary: This study presents an efficient method for demethylation of lignin-derived aromatics using acidic concentrated lithium bromide (ACLB) under moderate conditions. It was found that aromatics with one or two methoxy groups (G-type and S-type) could be demethylated using this method, while alkyl hydroxyl and carbonyl groups underwent unwanted bromination and condensation reactions, respectively. The presence of electron-donating substituents promoted demethylation, while electron-withdrawing substituents retarded the reaction. The presence of an ortho-carboxylic group enhanced demethylation.
Article
Biochemistry & Molecular Biology
Liqian Chen, Hui Zhen, Zixin Chen, Mujie Huang, Daniel W. Mak, Wei Jin, Yuxiu Zou, Mingjie Chen, Mingyue Zheng, Qingqiang Xie, Zhongjun Zhou, Guoxiang Jin
Summary: This study deciphers the role of m6A modification during A-P axis specification in planarian regeneration and identifies key genes involved in this process.
COMPUTATIONAL AND STRUCTURAL BIOTECHNOLOGY JOURNAL
(2023)
Article
Construction & Building Technology
Ping-Jie Li, Ming-Jie Chen, Wen-Huo Sun
Summary: This study investigates the force and deformation characteristics of a full-section immersed tube with a post-pouring belt under the hydration reaction. By establishing a numerical model and analyzing the stress, cracking, and deformation, it is found that the connection of steel bars increases the risk of cracking in the bottom plate.