Article
Polymer Science
Tuemay Abadi Belay, Jupeng Chen, Huan Xu, Shaowen Zhang, Shilu Chen, Xiaofang Li
Summary: The study presents a method for the synthesis of silane-end-functionalized linear and star polymers through metal-free borates or borane mediated polymerization, with properties easily tunable by varying the type and concentration of hydrosilanes. H-1, Si-29, and H-1-Si-29 HMBC NMR, FT-IR, ESI-MS, and MALDI-TOF-MS analyses confirm the presence of silane-end-functional groups in these polymers, with hydrosilanes playing a dual role in the polymerization process.
Article
Polymer Science
Monica A. Marks, Kyriaki Kalaitzidou, Will R. Gutekunst
Summary: A modular strategy for synthesizing dendron-linear polymer hybrids was developed, allowing for the creation of a 12-membered family of materials with variable properties. The physical behavior of these hybrids significantly changed after introducing cationic dendron end-groups, resulting in soft-solid materials with inhibited chain mobility. These hybrids are expected to act as surface-active antimicrobial additives in bulk cross-linked silicone systems.
MACROMOLECULAR RAPID COMMUNICATIONS
(2021)
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, Applied
Melisa Trejo-Maldonado, Luis Ernesto Elizalde, Benjamin Le Droumaguet, Daniel Grande
Summary: A versatile approach was developed for the preparation of porous polystyrene frameworks functionalized with triazolyl moieties. The porous materials were synthesized from PLA-b-P(S-stat-4-AMS) diblock copolymer precursors and characterized by various analytical techniques. Functionalization of the materials with p-tolylacetylene or 2-methyl-3-butyn-2-ol was achieved via copper-catalyzed azide-alkyne cycloaddition, resulting in high yields of the triazole ring.
REACTIVE & FUNCTIONAL POLYMERS
(2021)
Article
Chemistry, Multidisciplinary
Mayuri K. Porwal, Yernaidu Reddi, Derek J. Saxon, Christopher J. Cramer, Christopher J. Ellison, Theresa M. Reineke
Summary: This study demonstrates the facile synthesis of functional stereoregular polysaccharides with 1,6-alpha linkages from biomass-derived levoglucosan through cationic ring-opening polymerization. Computational studies show that metal triflate catalysts exhibit high coordination efficiency with levoglucosan derivatives and low toxicity compared to previous catalysts. The reported polymers have good thermal stability and a wide glass transition temperature window.
Article
Materials Science, Multidisciplinary
Debanjan Chakraborty, Shyamapada Nandi, Rinku Kushwaha, Dhananjayan Kaleeswaran, Ramanathan Vaidhyanathan
Summary: Three cationic viologen functionalized polymers have been synthesized using metal catalyst-free Bakelite chemistry, showing high stability and thermal stability in organic or aqueous medium. These polymers exhibit remarkable capture capacities and selectivity for oxo-anions, even in the presence of excess interfering anions, and can capture oxo-anions over a wide pH range. Additionally, the capture mechanism follows a pseudo-second-order kinetics, corroborating the observed selectivities.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Chemistry, Multidisciplinary
Shorouk O. Badir, Alexander Lipp, Matthias Krumb, Maria Jesus Cabrera-Afonso, Lisa Marie Kammer, Victoria E. Wu, Minxue Huang, Adam Csakai, Lisa A. Marcaurelle, Gary A. Molander
Summary: DNA-encoded library (DEL) technology offers a cost-effective approach for drug discovery in the pharmaceutical industry, particularly through the implementation of water-compatible transformations and mild reaction conditions. This report discusses decarboxylative-based hydroalkylation of DNA-conjugated trifluoromethyl-substituted alkenes and photoredox-catalyzed hydroarylation of functionalized olefins, both enabling the creation of complex structural scaffolds with high densities of functional groups while maintaining DNA tag integrity.
Article
Polymer Science
Bing Zhang, Zhiqiang Tan, Yinhu Zhang, Qingquan Liu, Qianxia Li, Gen Li
Summary: In this study, microporous organic polymers (MOPs) were prepared by condensation reactions of substituent-group-free carbazole and pyrrole with 1,1'-ferrocenedicarboxaldehyde. The obtained polymers showed abundant micropores and have potential applications in degrading dyes with high efficiency.
Article
Polymer Science
Francesca Coccia, Liudmyla Gryshchuk, Pierluigi Moimare, Ferdinando de Luca Bossa, Chiara Santillo, Einav Barak-Kulbak, Letizia Verdolotti, Laura Boggioni, Giuseppe Cesare Lama
Summary: Cellulose Nanocrystals (CNC) functionalized with suitable bio-based polyols can be used as reactive fillers in bio-based polyurethane foams to improve mechanical properties. The successful grafting of bio polyol on CNC was evaluated using FTIR analysis and thermogravimetric analysis, showing improved thermal stability and mechanical properties of the filled foams. Additionally, the morphology of the polyurethane foams was influenced by the functionalization of CNC.
Article
Chemistry, Multidisciplinary
Yudai Morota, Takanaga Suzuki, Kira B. Landenberger
Summary: Halogen bonding is recognized as an important intermolecular interaction in supramolecular chemistry. This study developed three new vinyl ether monomers containing halogen bonding donor moieties to facilitate cationic polymerization, using a proton trap and a co-Lewis acid to accelerate the reaction. The polymerization rate was influenced by the chain length, with C4I exhibiting the most pronounced halogen bonding.
Article
Chemistry, Multidisciplinary
Leire San Jose, Olga Garcia, Isabel Quijada-Garrido, Mar Lopez-Gonzalez
Summary: Zinc oxide quantum dots (ZnO QDs) possess remarkable photoluminescent, biocompatible, biodegradable, and antibacterial properties, making them suitable for bio-related and technological applications. In this study, stable fluorescent hybrid ZnO QDs were synthesized using different polymers as templates and ligands. The presence of hydroxylated homopolymers and block copolymers significantly enhanced the fluorescence of ZnO QDs. The synthesized hybrid ZnO QDs exhibited uniform and stable enhanced photoluminescence in aqueous media. Additionally, the hybrid ZnO QDs synthesized in this study showed high selectivity for detecting Cr6+, Fe2+, or Cu2+ in water.
Article
Chemistry, Multidisciplinary
Kalyan Dey, Narayanaswamy Jayaraman
Summary: In this study, pyridinoimine-functionalized poly(ether imine) dendrimers were synthesized and their contributing resonance forms were assessed through NMR studies. Solvatochromism and NMR studies were used to further confirm the results.
Article
Chemistry, Multidisciplinary
Wan-Kai An, Shi-Jia Zheng, Hui-Xing Zhang, Tian-Tian Shang, He-Rui Wang, Xiao-Jing Xu, Qiu Jin, Yuchen Qin, Yunlai Ren, Song Jiang, Cui-Lian Xu, Mao-Song Hou, Zhenliang Pan
Summary: This study presents the successful construction of two porous HCP photocatalysts featuring s-tetrazine units and surface areas larger than 700 m(2) g(-1) through Friedel-Crafts alkylation reactions. These TZ-HCPs demonstrate excellent activities for the green synthesis of benzimidazoles, showcasing the wide-ranging prospects of application of HCPs as metal-free and green photocatalysts for the preparation of fine chemicals.
Article
Chemistry, Multidisciplinary
Sabrina S. Scott, Brahmjot Kaur, Cameron H. M. Zheng, Patrick Brant, Damon J. Gilmour, Laurel L. Schafer
Summary: Early transition metal-catalyzed hydroamino-alkylation is an efficient method to add amines to polybutadienes, offering access to amine-functionalized polyolefins. Tantalum catalyst can be used to functionalize different ratios of 1,2-polybutadiene polymers, and the degree of amination can be controlled by modifying amine and catalyst loading.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Polymer Science
Yann Bernhard, Joachim F. R. Van Guyse, Martin Purino, Richard Hoogenboom
Summary: Post-polymerization modification of poorly reactive polyacrylates has become an important tool to access functionalized poly(meth)acrylates and poly(meth)acrylamides. The amidation of polymethylacrylate (PMA) using catalysis is efficient in obtaining functional polymers. However, the use of protected amines and ethyl group plays a crucial role in preventing unwanted side reactions. The developed platform is also useful in preparing hydrophilic copolymers and hydrogel materials for various applications.
EUROPEAN POLYMER JOURNAL
(2023)
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)