Article
Polymer Science
Xiaochun Mu, Yang Li
Summary: The syndiospecific coordination polymerization of carbazole-substituted styrene derivatives using a rare-earth metal catalyst showed high activity and excellent syndioselectivity. By adjusting the feed amount, the insertion rate of carbazole-substituted monomers could be simply adjusted, resulting in copolymers with gradient sequence distributions confirmed by analysis and kinetics study.
Article
Materials Science, Composites
Isao Yamaguchi, Tomohiro Hirota, Aohan Wang
Summary: In this study, treatment of graphene oxide (GO) with 4-aminophenyl groups (AP) yielded an ammonium radical cation (GO-AP(.+)), leading to the successful synthesis of water-soluble GO composites. These composites, grafted with poly(4-sulfopropyl)aniline and poly(4-sulfopropyl)aniline-co-aniline, exhibited certain optical properties and electrochemical behaviors.
POLYMER COMPOSITES
(2021)
Article
Polymer Science
Takenori Nishida, Kotaro Satoh, Masazumi Tamura, Yingai Li, Keiichi Tomishige, Masami Kamigaito
Summary: This work is a comprehensive study of the cationic and radical polymerizations of exo-methylene six-membered conjugated dienes, investigating the effects of substituents on monomer reactivities and thermal properties of the polymers. The results show that the position of the methyl group and the isopropyl substituents play important roles in the monomer reactivity, and the unique structures of the biobased compounds enhance the thermal properties of the resulting polymers.
Article
Polymer Science
Jihye Park, Yeji Yu, Joo Won Lee, Byeong-Su Kim
Summary: Polymers with carboxylic acid functionalities are widely used in various applications. However, synthesizing such polymers via traditional radical polymerization methods is challenging. This study presents a novel approach using a functional epoxide monomer to overcome the limitations, allowing for the controlled synthesis of polymers with carboxylic acid groups.
Article
Thermodynamics
Sergey P. Verevkin, Vladimir N. Emel'yanenko
Summary: The absolute vapor pressures of several benzaldehyde derivatives were measured experimentally, and standard molar enthalpies of sublimation and vaporization were derived. A consistent set of thermodynamic data could be recommended for optimizing lignin valorization technologies.
FLUID PHASE EQUILIBRIA
(2021)
Article
Chemistry, Inorganic & Nuclear
Nam Young Ahn, Jooyeon Lee, Wonjune Yeo, Hyojin Park, Jiyun Nam, Min Kim, Myungeun Seo
Summary: We have developed a synthetic method for decorating the surface of metal-organic frameworks (MOFs) with polymers through postsynthetic modification. By reacting well-defined polymers with reversibly deactivated radical species at their chain end with vinyl-functionalized MOFs in the presence of a radical initiator, we can form a C-C bond between the polymer end and the functional group at the MOF ligand. We have successfully achieved four polymer@MOF composites through this method.
INORGANIC CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Emine Gul Cansu Ergun, Buket Bezgin Carbas
Summary: 2,5-dithienyl-N-substituted-pyrrole (SNS) derivatives are preferred for obtaining conducting polymers due to their low oxidation potential and ease of electrochemical polymerization. The SNS backbone can be substituted from the nitrogen atom on the pyrrole unit, allowing fine tuning of spectroelectrochemical properties. Copolymerization of SNS derivatives with 3,4-ethylenedioxythiophene (EDOT) enables further tuning or enhancement of the resulting copolymer. This review discusses the electrochemically synthesized conducting copolymers of SNS derivatives with EDOT, categorizing them based on N-substitutions and evaluating the effect of different substitutions and EDOT incorporation on the electrochromic properties. Electrochromic device applications of related copolymers are also discussed, providing insights for the design of new SNS derivatives for copolymerization.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Xiaoxian Lu, Xun Zhang, Chengjian Zhang, Xinghong Zhang
Summary: The alternating copolymerization of cyclic anhydride and o-phthalaldehyde is reported for the synthesis of cyclic and recyclable polyesters. The method is efficient and utilizes common catalysts at room temperature, producing high yields within a short time. The resulting polyesters have well-defined alternating sequences and high-purity cyclic topology, and can be easily recycled to their monomers through chemical reactions.
Article
Chemistry, Organic
Max Born, Thomas C. Fessard, Lucas Goettemann, Jakob Plank, Thomas M. Klapoetke
Summary: This study presents a new method for the synthesis of poly(3-azidooxetane), which offers increased yield and improved safety compared to its precursor, 3-azidooxetane. The thermal behavior, energetic performance, plasticizer compatibility, and curing of poly(3-azidooxetane) were thoroughly investigated, and it was found to be a suitable substitute for GAP, with potentially more environmentally friendly properties.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Polymer Science
Marc Comi, Salvador Moncho, Salahuddin Attar, Maciej Barlog, Edward Brothers, Hassan S. Bazzi, Mohammed Al-Hashimi
Summary: The synthesis and characterization of asymmetric alkoxy-fluoro-benzothiadiazole (BT) acceptor core derivatized with a series of heterocycles is reported. The effect of the different chalcogen atoms in the flanked-heterocycles on the physicochemical properties of the homopolymers is studied.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Article
Chemistry, Organic
Hedvig Bolcskei, Nemet-Hanzelik Andrea, Gyorgy Keglevich
Summary: In medicinal chemistry, benzyloxy-benzaldehyde is an important intermediate for drug design. This study focused on the synthesis and reactions of benzyloxy-benzaldehyde with the attachment of a five membered heterocycle. Different methods for Suzuki cross-coupling were studied, using various boronic acids. The reactions were monitored and the products were purified. The study resulted in the synthesis of 26 new compounds.
CURRENT ORGANIC CHEMISTRY
(2022)
Article
Polymer Science
Huining Ding, Xianmin Wu, Bing Han, Ning Liu, Binyuan Liu, Il Kim
Summary: Highly regioselective ring-opening copolymerizations of 5-norbornene-2,3-dicarboxylic anhydride (NA) and epoxide monomers have been achieved using Cr-III catalysts and specific ligands, allowing for the control of cis/trans regioselectivity in the resulting polyesters by adjusting feed ratio and monomer structure. The resulting polyesters from the copolymerization of NA and epichlorohydrin provide a robust platform for post-modification, with the ring-strained C=C double bonds in the norbornene units facilitating further functionalization through azide-alkene 1,3-dipolar cycloaddition reactions based on desired targets.
Article
Chemistry, Multidisciplinary
Yiyang Xiao, Yichen Sun, Xin Wang, Yan Xu, Jianbo Wang
Summary: In this study, we report a method for synthesizing alternating copolymers of styrene and substituted styrenes through radical alternating copolymerization and protodeboronation. This synthetic strategy is effective for various substituted styrene co-monomers, and the Bpin group plays a crucial role in achieving alternating polymerization. The method shows great potential for applications, and is also compatible with RAFT living polymerization.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Polymer Science
Jiawei Chen, Wenbing Wang, Yao Pan, Dan Peng, Yougui Li, Chen Zou
Summary: In this study, direct copolymerization of plant oil-based copolymer monomers with ethylene was achieved using a dienyl phosphoribosulfonyl palladium catalyst (PO-Pd). Addition, ureido-pyrimidinone (UPy) functionalization was performed using the hydroxyl group of the polymer. The incorporation of biomass groups effectively modifies the surface and mechanical properties of the copolymers, and these newly developed polymers are ideal tougheners for gutter oil due to their excellent tunability of the self-complementary hydrogen bonding network (UPy).
Article
Chemistry, Organic
Ahmed G. Taha, Elghareeb E. Elboray, Yusuke Kobayashi, Takumi Furuta, Hussien H. Abbas-Temirek, Moustafa F. Aly
Summary: The 1,3-dipolar cycloaddition reactions of 2- and 3-nitrobenzaldehydes with 2-aminomethylpyridine and ethyl (2E)-2-cyano-3-(4-nitrophenyl)prop-2-enoate were found to selectively yield endo-cycloadducts as the sole products under various reaction conditions. However, 4-nitrobenzaldehyde behaved differently, producing a mixture of endo- and exo'-cycloadducts. The reaction is solvent- and temperature-dependent, and both endo- and exo'-cycloadducts were synthesized in an excellent regio-, stereo-, and chemoselective fashion. Retro-1,3-dipolar cycloadditions of the endo-cycloadducts were conducted, and mechanistic studies were carried out to support proposed mechanisms.
JOURNAL OF ORGANIC CHEMISTRY
(2021)