Article
Polymer Science
Shehla Mushtaq, Nasir M. Ahmad, Azhar Mahmood, Mudassir Iqbal
Summary: Amphiphilic copolymers of P(DMAEMA-co-MMA) with antibacterial activity were synthesized and optimized to control biofilm adhesion, exhibiting significant zones of inhibition against Gram-positive Staphylococcus aureus and Gram-negative Escherchia coli. The copolymer PDM1 showed good inhibitory effects, particularly in controlling bacterial biofilm adhesion.
Article
Engineering, Chemical
Zubaida Rukhsana Usha, Dafaalla M. D. Babiker, Rui Yu, Junsheng Yang, Wei Chen, Xin Chen, Liangbin Li
Summary: This study demonstrated a stable and large-scale super hydrophilic and underwater superoleophobic membrane, which achieved permanent high-efficiency separation performance through special treatment and modification, and can be widely used for water separation from oily wastewater.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Silvana Alfei, Debora Caviglia, Gabriella Piatti, Guendalina Zuccari, Anna Maria Schito
Summary: Untreatable infections are a global concern due to the rising resistance of bacteria to antibiotics. In this study, new cationic nanoparticles CP1 and OP2 were synthesized and found to possess potent broad-spectrum antibacterial effects against multi-drug resistant pathogens. Time-killing studies demonstrated their rapid bactericidal activity. These nanoparticles have interesting physicochemical properties and could potentially be used as ingredients in novel antibacterial dosage forms for topical applications.
Article
Chemistry, Multidisciplinary
Yurii Utievskyi, Christof Neumann, Julia Sindlinger, Konstantin Schutjajew, Martin Oschatz, Andrey Turchanin, Nico Ueberschaar, Felix H. Schacher
Summary: In this study, a new heterogeneous catalyst was developed for glucose oxidation. The catalyst showed good catalytic activity over multiple cycles, although the activity declined with increasing cycle numbers. Detailed analysis revealed that the catalytic process did not significantly affect the block copolymer matrix.
Article
Chemistry, Applied
Marco A. De Jesus-Tellez, Susana De la Rosa-Garcia, Itzel Medrano-Galindo, Ingrid Rosales-Penafiel, Sergio Gomez-Cornelio, Carlos Guerrero-Sanchez, Ulrich S. Schubert, Patricia Quintana-Owen
Summary: In this study, a series of PDMAEMAs with different molar masses were synthesized by RAFT polymerization and treated with two alkyl halides to assess their antifungal activity against various fungi. The results demonstrated that PDMAEMAs, especially those with low molar mass, exhibited significant antifungal properties, with DQ having less impact than molar mass on antifungal activity. This detailed screening contributes to a better understanding of PDMAEMA-based composites for antimicrobial protective coatings.
REACTIVE & FUNCTIONAL POLYMERS
(2021)
Article
Chemistry, Multidisciplinary
Anastasios Stergiou, Ioanna K. Sideri, Martha Kafetzi, Anna Ioannou, Raul Arenal, Georgios Mousdis, Stergios Pispas, Nikos Tagmatarchis
Summary: This study presents a straightforward approach for the growth of perovskite nano-crystals and their electronic communication with graphene, mediated by polymeric materials. The perovskite nano-crystals were immobilized on graphene via a bi-modal polymer, allowing for stable bindings and barrierless charge transport. The resulting structures showed uniform spherical perovskite nano-crystals on graphene nano-sheets, and demonstrated efficient electronic communication.
Article
Chemistry, Applied
Kai Shi, Xu Yang, Jiuduo Xu, Di Sha, Baolong Wang, Xue Liu, Zhi Liu, Xiangling Ji
Summary: The study successfully fabricated dual thermo/pH-responsive hydrogels with high water absorption rate and repeated absorption performance, showing significant pH responsiveness and antibacterial activities.
REACTIVE & FUNCTIONAL POLYMERS
(2021)
Article
Polymer Science
Jun Zhong, Xinyue Zhang, Xiaofeng Yu, Xuanyu Shi, Shihao Sun, Li Yang, Min Zuo, Yihu Song, Qiang Zheng
Summary: The selective distribution of silica nanoparticles grafted with crosslinked PMMA in PMMA/SAN blend was studied. Highly crosslinked PMMA chains mainly located in the PMMA-rich domains, while linear PMMA chains mainly located at the blend matrix interface. NPs grafted with slightly crosslinked chains were partially located at the interface and partially in the PMMA-rich domains. The deviation between theoretical prediction and actual location of modified NPs may be related to the heterogeneity of miniemulsion polymerization. The different locations of modified NPs induced by different grafted chain structures can result in various compatibilization effects on PMMA/SAN blend.
Article
Polymer Science
Chen Wang, Jie Zhang, Hanying Zhao
Summary: Surfactant-free reversible addition-fragmentation transfer (RAFT)-mediated emulsion polymerization has been used to synthesize latex particles. In this study, RAFT emulsion polymerization of methyl methacrylate (MMA) mediated by protonated poly(2-(dimethylamino)ethyl methacrylate) (H+-PDMAEMA) macromolecular chain transfer agent (macro-CTA) was investigated. The nucleation time and rate of emulsion polymerization were found to be dependent on the chain length of H+-PDMAEMA-CTA and the molar ratio of free radical initiator/macro-CTA. The size and size distribution of the latex particles could be controlled by adjusting the macro-CTA chain length and MMA/macro-CTA molar ratio.
JOURNAL OF POLYMER SCIENCE
(2023)
Article
Materials Science, Biomaterials
Amit Kumar, Jyoti Sharma, Preeti Srivastava, Leena Nebhani
Summary: Macroporous antimicrobial polymeric gels (MAPGs) with different alkyl chain lengths attached to active quaternary ammonium cations have been prepared. The amount of crosslinker was also varied during gel fabrication. Characterization and testing showed that the antimicrobial activity and mechanical properties of the gels were influenced by the alkyl chain length and crosslinker amount.
JOURNAL OF MATERIALS CHEMISTRY B
(2023)
Article
Chemistry, Analytical
Fairouz Aberkane, Imene Abdou, Nadia Zine, Nicole Jaffrezic-Renault, Abdelhamid Elaissari, Abdelhamid Errachid
Summary: An electrochemical sensor for melamine detection has been developed using a modified glassy carbon electrode, with a large detection range and low detection limit. The sensor's performance in the presence of various interfering species has also been studied.
Article
Polymer Science
Valdomiro V. de Souza, Gustavo P. B. Carretero, Phelipe A. M. Vitale, Iris Todeschini, Paloma O. Kotani, Greice K. Saraiva, Cristiane R. Guzzo, Hernan Chaimovich, Fabio H. Florenzano, Iolanda M. Cuccovia
Summary: Amphiphilic diblock copolymers can assemble in aqueous solutions to form polymersomes, which can respond to pH, temperature, and other conditions. These robust vesicles are being studied as drug delivery systems or nanoreactors. Through characterization, it was found that these polymersomes with dual stimulus-response may serve as a platform for gene delivery and nanoreactors.
Article
Polymer Science
Opeyemi J. Ajogbeje, Igor Lacik, Robin A. Hutchinson
Summary: The aqueous solution radical polymerization of DMAEMA was studied using in situ NMR spectroscopy. It was found that non-ionized DMAEMA hydrolyzes to form ionized MAA and 2-(dimethylamino)ethanol at pH > 6.0. Fully ionized DMAEMA polymerizes faster in water than non-ionized DMAEMA in dimethyl sulfoxide. Hydrolysis of DMAEMA complicates the reaction at pH 8.0 to 10.1, leading to the copolymerization of MAA and the formation of poly(DMAEMA-co-MAA).
Article
Polymer Science
Izabela Zaborniak, Malgorzata Sroka, Pawel Chmielarz
Summary: Controlled radical polymerization techniques are widely used in polymer chemistry. The use of lemon extract in the polymerization of DMAEMA allows for accelerated synthesis and well-defined PDMAEMA structures. This method offers advantages such as a simple reaction setup, no need for laboratory-grade reducing agents, and environmentally friendly synthesis.
Article
Polymer Science
Tatiana P. Loginova, Irina A. Khotina, Yurii A. Kabachii, Sergei Yu. Kochev, Vyacheslav M. Abramov, Valentin S. Khlebnikov, Natalia L. Kulikova, Yaroslav O. Mezhuev
Summary: Cationic copolymers based on 2-(N,N-dimethylamino)ethyl methacrylate and polyethylene glycol monomethyl ether (pDMAEMA-co-PEO) with different molecular weights were synthesized. The physicochemical properties of interpolyelectrolyte complexes of these polycations with circular DNA (IPEC DNA) were studied. It was found that the diameter and zeta-potential of the complexes can be varied by changing the ratio of ionizable groups in the copolymers and DNA, as well as by regulating pH. The resistance of the complexes to nucleases and the transfection efficiency of the polycations into human embryonic kidney cells were also investigated.
Article
Chemistry, Multidisciplinary
Qian Wu, Yubo Cui, Guifeng Xia, Jinlong Yang, Shuming Du, Xinhong Xiong, Li Yang, Dong Xu, Xu Deng, Jiaxi Cui
Summary: Passive daytime radiative cooling (PDRC) technology, while promising for global spacing cooling, faces limitations in practical application due to reduced cooling effectiveness caused by wear and dirt contamination. Researchers have developed a renewable armor structure using fluorinated hollow glass microspheres to enhance the anti-fouling and cooling properties of PDRC coatings. The coatings exhibit high solar reflectance and thermal emittance, leading to significant temperature reduction below ambient temperature.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Qiang Bei, Bei Zhang, Kaifeng Wang, Shiming Zhang, Guichuan Xing, Clement Cabanetos
Summary: The power conversion efficiency (PCE) of organic solar cells (OSCs) has reached 20% in recent years, thanks to the advantages of organic photoactive materials. Benzothiadiazole (BT) has attracted significant research attention as a building block of OSCs. OSCs based on BT structure have shown diversity, and the increasing PCE values indicate a promising future for OSCs. This review analyzes the progress made in the last decades, focusing on effective BT small-molecules and BT polymers for OSCs. The structure-property relationships, donor-acceptor matching criteria, and morphology control approaches are discussed. The remaining challenges and a personal perspective on the future advancement of OSCs are summarized.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Rong He, Dandan Tang, Ningge Xu, Heng Liu, Kun Dou, Xuejun Zhou, Fabiao Yu
Summary: Nasopharyngeal carcinoma (NPC) is a common malignant tumor of the head and neck, with a high incidence in China and Southeast Asian countries. In this study, a novel near-infrared fluorescent probe, SNAFL-GSH, was designed and synthesized for the detection of glutathione (GSH). The probe showed selective detection of GSH and the ability to distinguish normal and cancer cells. It has great potential for application in the diagnosis and evaluation of NPC.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Zhukang Guo, Baijiang Jin, Yile Fang, Lian Jin, Song Li, Yan Deng, Zhu Chen, Hui Chen, Yuanying Zhang, Rabia Usman, Nongyue He
Summary: This study isolated primary cells that can be stably passaged from spontaneous tumors of genetically engineered pancreatic ductal adenocarcinoma model mice and used an autonomously developed automated screening instrument for efficient nucleic acid aptamer screening. The obtained aptamers were affinity verified at the cellular level. The study also investigated the impact of cell growth environment difference on the recognition ability of aptamers and confirmed the targeting ability and drug loading ability of the aptamer.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Zhongshan Yang, Qiqi Zhang, Hui Song, Xin Chen, Jiwei Cui, Yanhui Sun, Lequan Liu, Jinhua Ye
Summary: Methane chemistry is a significant area of research in catalysis. Converting methane into value-added chemicals is desirable but challenging due to its high C-H bonding energy and lack of pi bonding or unpaired electrons. Photocatalytic partial oxidation of methane to liquid oxygenates is a promising technology for achieving high efficiency and selectivity under mild conditions. The choice and activation of oxidants are crucial for its performance.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Peng Shan, Jing Liao, Jiayi Li, Chengyan Wang, Jie Zhou, Linqiang Mei, Yunlu Dai, Qiang Wang, Wenyan Yin
Summary: This study reports an oral radioprotectant Gel@GYY that combines a gelatin-based hydrogel and a pH-responsive hydrogen sulfide donor. Gel@GYY has excellent adhesion and sustained release properties, allowing it to release H2S in the gastrointestinal tract and effectively scavenge free radicals induced by radiation. It also reduces inflammation and has biodegradable properties.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Lu Liu, Ziyi Liu, Jingnan Cui, Guiling Ning, Weitao Gong
Summary: The development of new metal-free heterogeneous catalysts has been the subject of extensive research. In this study, a new Troger's base (TB)-derived porous organic polymer (POPs) was designed and prepared by integrating multifunctional monomers. The resulting polymer, which combines the advantages of pillar[5]arene macrocycle and TB moiety, exhibited enhanced catalytic performance in Knoevenagel condensation and CO2 conversion, serving as an effective metal-free catalyst. This work provides a new strategy for fabricating metal-free heterogeneous catalysts based on macrocyclic POPs.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Leyong Zhou, Changyin Yang, Weitao Dou, Tongxia Jin, Haibo Yang, Lin Xu
Summary: This review summarizes the application of micro/nanofluidic techniques in constructing supramolecular assemblies of different scales, and highlights the advantages of these techniques over conventional synthesis methods. Furthermore, it emphasizes the potential of micro/nanofluidic systems in improving our understanding of supramolecular self-assembly processes.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Yanchao Jin, Suixiaochen Chen, Peiwen Huang, Xiongjian Chen, Chun-Yan Lin, Li-Ping Li, Xiao Chen, Rui Ding, Jianxi Liu, Riyao Chen
Summary: In this study, magnesium and coconut shell carbon were used to disinfect water by adsorbing copper(II) and converting dissolved oxygen to hydrogen peroxide through Mg corrosion. The copper was enriched on the carbon surface and efficiently catalyzed the hydrogen peroxide to inactivate E.coli. The process showed promising disinfection performance both in laboratory experiments and real wastewater treatment.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Haihong Lai, Zehong Chen, Hao Zhuo, Yijie Hu, Xuan Zhao, Jiwang Yi, Hongzhi Zheng, Ge Shi, Yifan Tong, Ling Meng, Xinwen Peng, Linxin Zhong
Summary: By altering the pyrolysis route of cellulose nanofiber, the structural defects of carbon aerogels can be reduced, leading to improved compressibility and stress retention, as well as higher stress sensor sensitivity and temperature coefficient.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Lina Guo, Jinsong Ding, Wenhu Zhou
Summary: Bacteria-based tumor therapy has resurfaced due to the revolution of tumor immunotherapy, offering unique solutions for traditional tumor treatments. Bacteria with active tropism can selectively colonize tumor sites and suppress tumor growth through various mechanisms, making them attractive tools for tumor treatment. This critical review introduces recent advances in bacteria-based tumor therapy, including bacterial properties, their benefits for tumor therapy, anti-tumor mechanisms, challenges, and future perspectives.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Lan Liang, Chuanbin Wang, Xukai Lu, Yunan Sun, Beibei Yan, Ning Li, Guanyi Chen, Li'an Hou
Summary: This study investigates the interactions between phenol and benzaldehyde in the ECH process through experiments and theoretical calculations. The results show that phenol can accelerate the conversion of benzaldehyde, while benzaldehyde inhibits the conversion of phenol. The research provides a theoretical basis for the application of ECH in practical bio-oil upgrading.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Pengcheng Fan, Yuhao He, Junan Pan, Ning Sun, Qiyu Zhang, Chen Gu, Kang Chen, Weinan Yin, Longlu Wang
Summary: This study focuses on the recent progress in hydrogen evolution reaction (HER) based on photothermal effect. It introduces the main pathways of photothermal conversions applied in H2 evolution, summarizes the functions of the photothermal effect, and presents a method to improve the catalytic system through thermal means. The study also discusses the challenges and outlook in this promising area.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Leiduo Lai, Hongyu Zhou, Yichen Hong, Mengfan Luo, Yang Shi, Heng Zhang, Zhaokun Xiong, Gang Yao, Bo Lai
Summary: In this study, a facile ammonia reduction strategy was proposed and a novel FeVO3-x catalyst was synthesized for the activation of peroxymonosulfate (PMS) to degrade the pharmaceutical carbamazepine (CBZ). The results showed that the system could rapidly degrade CBZ and generate various active species involved in the degradation process.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Tangxin Xiao, Xiuxiu Li, Liangliang Zhang, Kai Diao, Zheng-Yi Li, Xiao-Qiang Sun, Leyong Wang
Summary: This study presents the construction of a supramolecular light harvesting system based on sequential energy transfer. The system demonstrates tunable fluorescence emission through self-assembly of polymers into nanoparticles, achieving efficient two-step light harvesting.
CHINESE CHEMICAL LETTERS
(2024)