Article
Chemistry, Multidisciplinary
Keita Kuroda, Makoto Ouchi
Summary: This study reveals the peculiar isomerization propagation of benzyl vinyl ether with an electron-deficient acrylate in radical copolymerization. The backward isomerization of the radical species leads to a periodic consumption and allows the introduction of a benzyl ether structure in the resulting copolymer, leading to efficient degradation under acid conditions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Chemical
Jordi H. Badia, Carles Fite, Roger Bringue, Fidel Cunill, Javier Tejero
Summary: The kinetics of the simultaneous synthesis of ETBE and BTBE over A35 catalyst in the liquid phase was investigated. Various kinetic modeling approaches were compared, and it was found that empirical power-law modeling provided the best fit, while mechanistic modeling explained the reaction mechanisms.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Chemistry, Applied
Mustafa Tuzen, Baki Hazer, Adil Elik, Nail Altunay
Summary: A new block copolymer was synthesized and used as an adsorbent for the analysis of patulin in apple products using a Uv-visible spectrophotometer. The method was optimized for pH, sorbent amount, adsorption time, eluent type and volume, desorption time, and adsorption capacity. The method showed good analytical characteristics, with a low limit of detection and quantitation, wide linear dynamic range, and high recovery values.
Article
Microbiology
Vijayalakshmi Gunasekaran, Nuria Canela, Magda Constanti
Summary: A bacterial consortium capable of degrading ETBE was enriched and isolated, and the metaproteomic study revealed the effects of ETBE on the metabolism and response of the consortium.
Article
Biochemistry & Molecular Biology
Daniel Diez-Iriepa, Damijan Knez, Stanislav Gobec, Isabel Iriepa, Cristobal de los Rios, Isaac Bravo, Francisco Lopez-Munoz, Jose Marco-Contelles, Dimitra Hadjipavlou-Litina
Summary: Novel polyfunctionalized nitrones show potential antioxidant and neuroprotective properties in stroke treatment, with compound (Z)-N-benzyl-1-(2-(3-(piperidin-1-yl)propoxy)phenyl)methanimine oxide exhibiting significant antioxidant and neuroprotective activities.
Article
Polymer Science
Chang-Tong Song, Xian-Hong Zhang, Dong Chen, Yu-Hong Ma, Wan-Tai Yang
Summary: Precipitation polymerization has advantages in both polymer synthesis and applications without surfactant or dispersing agent. Poly(vinyl chloride-co-n-butyl acrylate-co-vinyl acetate) (PCBV) random terpolymers were successfully synthesized in the precipitation polymerization system using vinyl chloride (VC), n-butyl acrylate (BA), and vinyl acetate (VAc). The effects of various polymerization conditions on the polymerization kinetics, number-average molecular weight (M-n), and terpolymer composition were investigated systematically. The solvent and monomer feed ratio played crucial roles in the polymer morphology and reaction kinetics. VC based ternary copolymer obtained in n-hexane showed lower M-n (<20 kDa) and higher BA units mass fraction (>40 wt%) compared with emulsion and suspension polymerization. The terpolymer can be easily separated by simple centrifugation.
CHINESE JOURNAL OF POLYMER SCIENCE
(2023)
Correction
Chemistry, Multidisciplinary
Hiroshi Makino, Tsuyoshi Nishikawa, Makoto Ouchi
Summary: The study demonstrates that vinylboronic acid pinacol ester can serve as a vinyl alcohol-precursor monomer in radical copolymerization with styrene. The results provide guidance for developing new methods for copolymer synthesis.
CHEMICAL COMMUNICATIONS
(2021)
Article
Polymer Science
Xiaohu Feng, Ruofan Liu, Lei Shao, Xinghang Xu, Yushun Jin, Qisong Shi, Yibo Wu
Summary: Based on the synthesis of a highly efficient chain-transfer agent, the living cationic polymerization of isobutyl vinyl ether (IBVE) was successfully initiated by visible light catalysis. The random copolymerization of IBVE with other vinyl ether monomers was achieved by investigating their reactivity ratios. The study also revealed the influence of photocatalyst concentration and wavelength on the copolymerization reactions, with higher photocatalyst concentration and blue LED wavelength resulting in faster polymerization rates. This photocatalytic reaction provides a new approach to molecular design in cationic polymerization.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Yang Jiang, Shihui Li, Dongmei Cui
Summary: The polymerization of ethylvinyl ether (EVE) by rare-earth metal complexes was studied, revealing that metallocenecomplexes exhibited high catalytic activities and produced high molecular weight products under low temperature conditions, while non-metallocene complexes were largely inert in the same conditions.
Article
Polymer Science
Ryoya Kamiki, Tomohiro Kubo, Kotaro Satoh
Summary: This study aims to synthesize novel degradable polymers by copolymerizing bio-based thiocarbonyl compounds with various vinyl monomers using radical addition-fragmentation ring-opening reaction. The obtained polymers have degradable functional groups that can be cleaved under specific conditions with different chemical stimuli.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Article
Chemistry, Applied
Caroline Pereira, Jean-Sebastien Baumann, Vincent Humblot, Celine Falentin-Daudre
Summary: This study aimed to improve the adhesion and differentiation of osteoblast cells on titanium surfaces by grafting poly(VBP). The results showed that poly(VBP) grafted on titanium surfaces significantly improved the interaction between osteoblast cells and the surface.
REACTIVE & FUNCTIONAL POLYMERS
(2022)
Article
Chemistry, Multidisciplinary
R. Soto, C. Fite, E. Ramirez, J. Tejero, F. Cunill
Summary: The deactivating effect of acetonitrile (ACN) and ACN/water mixtures on the simultaneous syntheses of ethyl tert-butyl ether (ETBE) and tert-amyl ethyl ether (TAEE) over ion-exchange resins was investigated. Deactivation occurred in two stages, with an initial stage where activity did not decrease and a subsequent exponential decay due to neutralization of active sites by ACN-derived compounds. The best kinetic model to describe the activity loss was a first order model, with an estimated activation energy of 33.1 +/- 1.4 kJ mol(-1). The inhibitory effect of water was also evaluated using Langmuir and Freundlich isotherms.
REACTION CHEMISTRY & ENGINEERING
(2023)
Article
Polymer Science
Arihiro Kanazawa, Sadahito Aoshima, Ryosuke Hada
Summary: Polymers with silyl ether moieties have attracted significant interest due to their properties derived from silicon-oxygen linkages and acid-, base-, and fluoride ion-triggered degradability. In this study, 1,3-dioxa-2-silacycloalkanes were used as monomers for the synthesis of silyl ether polymers through cationic terpolymerization. The resulting terpolymers, which had ABC-type pseudo-periodic sequences, exhibited acid-, base-, or fluoride ion-triggered degradability and were degraded under acidic conditions.
Article
Polymer Science
Lyudmila Semenycheva, Victoria O. Chasova, Nikita L. Pegeev, Marina A. Uromicheva, Alexander V. Mitin, Yulia L. Kuznetsova, Ekaterina A. Farafontova, Yulia P. Rubtsova, Daria D. Linkova, Marfa N. Egorikhina
Summary: Collagen is a suitable material for regenerative medicine due to its good biocompatibility. However, its fibrillar structure hinders the formation of three-dimensional porous structures. To address this, synthetic monomer elements were introduced into collagen macromolecules to create collagen-based, branched, and crosslinked structures. The formation of graft copolymers involved radical initiation, collagen borination, and reversible inhibition, resulting in changes in the morphological pattern of the copolymer compared to native collagen. The non-toxic nature of the graft copolymer solutions at a certain concentration makes it a promising technique for producing new materials for regenerative medicine.
Article
Chemistry, Multidisciplinary
Maurizio D'Auria, Rocco Racioppi, Licia Viggiani
Summary: The reaction of ethyl vinyl ether with heteroaryl azides in the presence of MnSO4 leads to unexpected products. Depending on the specific azide used, different structures are formed, and DFT calculations are performed to explain the reaction mechanism.
Review
Chemistry, Multidisciplinary
Dan He, Yawen Li, Fuwen Zhao, Yuze Lin
Summary: High trap density in organic solar cells leads to localized charge carriers and reduced carrier lifetime, limiting device efficiency. This feature article summarizes the recent advances of trap suppression by material design and device engineering.
CHEMICAL COMMUNICATIONS
(2024)
Review
Chemistry, Multidisciplinary
Olivier Monfort, Arshitha Madhusudhan, Martin Motola
Summary: This article presents the advantages of coupling photocatalysis and Fenton-based processes for environmental remediation and discusses their synergy. It critically examines the simultaneous triggering of these two processes and provides insights into research approaches. The study aims to enhance understanding of this complex process and highlight the potential integration of new catalysts in current wastewater treatment technology.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Manideepa Dhar, Chittaranjan Mishra, Avijit Das, Uttam Manna
Summary: An approach of 'polymerization of monomers in its aggregated form' has been introduced to tailor the water wettability of fibrous and porous substrates, achieving hydrophobicity to superhydrophobicity transition, as well as patterned wettability. This facile chemical method provides a durable coating with adjustable and patterned wettability for various potential applications.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Saswat Ranjan Bhoi, Chhanda Debnath, Shikha Gandhi
Summary: In this article, a novel catalytic reaction using Pd(0) and Bronsted acid is reported for the synthesis of biologically important imidazolidinone-fused N-heterocycles through redox-neutral intramolecular N-allylation of indoles and pyrroles with alkynes. This atom-economical method is applicable to a wide range of substrates and eliminates the need for leaving groups or oxidizing agents commonly used in traditional allylation reactions.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Longkun Chen, Mingshuai Zhang, Meichen Liu, Zhuoyuan Liu, Yuetong Qiu, Zhilai Zhang, Fuchao Yu, Jiuzhong Huang
Summary: In this study, an efficient Rh(III)-catalyzed selective mono- and dual-C-H bond functionalization/cyclization with iodonium ylide as the sole coupling partner was demonstrated. Fused benzodiazepine skeletons were obtained in excellent yields, providing an improved approach to dual C-H unsymmetrical functionalization.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Alice Kennett, Sven Epple, Gabriella van der Valk, Irene Georgiou, Evelyne Gout, Romain R. Vives, Angela J. Russell
Summary: This study presents the design and synthesis of sulfated disaccharide inhibitors based on IdoA(2S)-GlcNS(6S), which showed potent inhibition of Sulf-2. The results suggest that IdoA(2S)-GlcNS(6S) is the shortest fragment size required for effective inhibition of Sulfs, and a trisulfated disaccharide is identified as the minimal fragment size of heparan sulfate for effective endosulfatase inhibition.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Mauro Garbini, Andrea Brunetti, Riccardo Pedrazzani, Magda Monari, Massimo Marcaccio, Giulio Bertuzzi, Marco Bandini
Summary: The self-adaptability of galvanostatic electrolysis was found to be helpful in a multistage chemo- and diastereoselective electrochemically promoted cyclodimerization of chalcones. Through a series of reductive events, densely functionalized cyclopentanes with five contiguous stereocenters were obtained (25 examples, yields up to 95%, dr values up to >20:1). Further experimental and electrochemical investigations indicated the crucial role of dynamic kinetic resolution of the aldol intermediate in the reaction mechanism.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Dhananjay S. Nipate, Neha Meena, Prakash N. Swami, Krishnan Rangan, Anil Kumar
Summary: In this study, the synthesis of functionalized benzo[a]phenazines and indazolo[2,3-a]quinolines was achieved through Rh(III)-catalyzed oxidative annulation of 2-arylquinoxalines and 2-aryl-2H-indazoles with allyl alcohols. The method showed a wide substrate scope, excellent functional group tolerance, good to high yields of annulated products, and the capability for scaled-up synthesis. A tentative mechanism of the annulation reaction was proposed based on a preliminary mechanistic investigation.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Ruonan Zhang, Abudukadi Tudi, Xia Yang, Xuping Wang, Zhihua Yang, Shujuan Han, Shilie Pan
Summary: A new lead tellurium borate material with a unique fundamental building block [B4O10] was synthesized and found to exhibit high birefringence. The structure-property relationship was discussed using first-principles calculations.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Amresh Kumar Singh, Baishali Thakurta, Anupam Giri, Monalisa Pal
Summary: This study introduces three key concepts for the quick synthesis of large-scale high-quality 2D materials films and their utilization in device fabrication.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Reina Hagiwara, Shun Nishimura, Kosuke Okeyoshi
Summary: A copolymer-conjugated nanocatalytic system has been developed to improve electron transfer and enhance photoinduced H2 generation.
CHEMICAL COMMUNICATIONS
(2024)