Article
Chemistry, Multidisciplinary
Yu Wang, Sushant P. Sahu, Alec J. Clay, Amanda J. Gildersleeve
Summary: By combining nitroxide radicals and ATRP active halogens into a functional reagent, simultaneous ATRP-NRC relay polymerization was successfully achieved, allowing for tailored macromolecular architecture and functionality by using different functional reagents.
CHEMICAL COMMUNICATIONS
(2021)
Article
Engineering, Chemical
Joseph J. Andry, Jaenic J. Lee, Jessica Wu, Katherine Xia, Eric S. Tillman
Summary: The study aims to find universal reaction conditions for different polymers to achieve high extents of coupling. By adjusting the choice of radical traps, high extents of coupling were successfully achieved for PSBr, PMABr, and PMMABr.
Review
Chemistry, Multidisciplinary
Ruoyu Li, Weina Kong, Zesheng An
Summary: This Minireview discusses the key roles enzymes play in reversible deactivation radical polymerization (Enz-RDRP) and highlights their applications in surface brush fabrication, sensing, polymerization-induced self-assembly, and high-throughput synthesis. The authors also reflect on the challenges and future directions of this emerging area.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Engineering, Environmental
Daliang Xu, Junfeng Zheng, Xin Zhang, Dachao Lin, Qieyuan Gao, Xinsheng Luo, Xuewu Zhu, Guibai Li, Heng Liang, Bart Van der Bruggen
Summary: Despite extensive research, fouling remains a major challenge for nanofiltration membranes. However, a highly antifouling membrane has been successfully fabricated by grafting poly(N-isopropylacrylamide) (PNIPAM) chains onto a bromine-containing polyamide layer. The resulting membrane exhibits double permeance compared to the pristine membrane, while maintaining the rejection of multivalent ions. Additionally, PNIPAM chains provide better deposition and adhesion resistance, reducing fouling and promoting flux recovery.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Polymer Science
Xiaoling Xu, Mei Hong, Chunyang Bao, Yan Wang, Jing Chen, Die Li, Tianheng Wang, Qiang Zhang
Summary: The claw-type Schiff base Py(3)Tren was utilized as an active ligand for photoinduced atom transfer radical polymerization (Photo-ATRP) with CuBr2 as the catalyst, enabling temporal control of the polymerization process and synthesis of well-defined poly(MMA) with high chain-end functionality confirmed by in situ chain extension. The polymerization mechanism was elucidated through UV/vis spectroscopy and electrospray ionization mass spectrometry (ESI-MS) experiments.
Article
Chemistry, Analytical
Haobo Sun, Jingliang Liu, Yunliang Qiu, Jinming Kong, Xueji Zhang
Summary: A highly sensitive and selective biosensor for methamphetamine detection was designed using aptamer recognition probe and ATRP signal amplification. The sensor could detect METH as low as 17 fM, with a recovery rate of 93% in serum and urine. This approach shows promising potential for sensitive detection of low concentration toxicants.
Article
Chemistry, Multidisciplinary
Chen Wang, Ruoqing Zhao, Wenru Fan, Lei Li, Haoyang Feng, Zexuan Li, Ci Yan, Xiaoyang Shao, Krzysztof Matyjaszewski, Zhenhua Wang
Summary: A facile approach for tribochemically controlled atom transfer radical polymerization (tribo-ATRP) was developed, which relies on contact-electro-catalysis (CEC) between titanium oxide (TiO2) particles and CuBr2/tris(2-pyridylmethylamine (TPMA), without any high-energy input. The friction induced by stirring electrifies the TiO2 particles, continuously reducing CuBr2/TPMA into CuBr/TPMA, thereby initiating ATRP. The design of tribo-ATRP enables CEC to access a variety of polymers with predetermined molecular weights, low dispersity, and high chain-end fidelity.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Yanyan Ba, Jingyu Zhang, Yuzhi Sun, Yanju Liu, Huaixia Yang, Jinming Kong
Summary: The study introduces a biosensor for CEA detection using ATRP technology, which shows high sensitivity and accuracy. The biosensor has a unique structure and is capable of accurately detecting CEA concentrations in a wide range. It exhibits strong linear relationship, excellent analytical performance, and outstanding sensitivity with anti-interference properties in practical sample analysis.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Polymer Science
Yue-Fei Zhang, Jian Tang, Tao Li, Yun Liu, Yan Li
Summary: This paper reports the successful polymerization of acrolein via UV-mediated ATRP and identifies suitable experimental conditions. The polyacrolein synthesized can be potentially applied in fields such as biomedical labeling, immobilization carrier, and organic amine adsorption.
Article
Chemistry, Applied
Carlotta Campalani, Nicola Bragato, Andrea Morandini, Maurizio Selva, Giulia Fiorani, Alvise Perosa
Summary: In this study, carbon dots (CDs) were used as green metal-free sensitizers in photoinduced atom transfer radical polymerizations (ATRP). Cheap and easily affordable CDs made from citric acid and diethylenetriamine were used to produce polymethacrylate (poly-METAC) under both ultraviolet (UV, lambda = 365 nm) and visible light. Different solvent systems were tested, and a CuII complex was used as catalyst. The polymerization resulted in a polymer with 89% conversion and narrow dispersity (1.4) under the best conditions. The constant concentration of radicals and controlled mechanism of the polymerization were further confirmed through first order kinetics and on-off experiments.
Article
Chemistry, Multidisciplinary
Friederike K. Metze, Irene Filipucci, Harm-Anton Klok
Summary: Polymer brushes can be produced by surface-initiated polymerization using initiators or chain transfer agents. This manuscript presents an alternative method using non-covalent host-guest interactions to immobilize initiators for atom transfer radical polymerization. These non-covalent initiators can generate supramolecular polymer brushes with film thicknesses over 100 nm.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Polymer Science
Julia Cuthbert, Shiwanka Wanasinghe, Krzysztof Matyjaszewski, Dominik Konkolewicz
Summary: Polymer networks synthesized by ATRP and RAFT showed differences in properties at both molecular and bulk levels, with ATRP potentially providing better control at longer chain lengths. Both methods resulted in similar properties at shorter chain lengths, indicating control through soluble components like catalyst in ATRP and soluble polymer fractions in RAFT.
Article
Biophysics
Pranav P. Kalelkar, Zhishuai Geng, Bronson Cox, M. G. Finn, David M. Collard
Summary: In this study, the surface of PLA was modified by bromination using NBS under UV irradiation, allowing for the introduction of bromine and quaternary ammonium groups to enhance antimicrobial efficacy and hydrophilicity of PLA films.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2022)
Article
Polymer Science
Qianqian Hao, Liang Qiao, Ge Shi, Yanjie He, Zhe Cui, Peng Fu, Minying Liu, Xiaoguang Qiao, Xinchang Pang
Summary: Recent research has shown that N-doping significantly enhances the UV-vis absorption of carbon dots (CDs), making them capable of catalyzing broadband-light induced ATRP. Specifically, pyridinic N has been identified as key for improving the catalytic activity of CDs for photo-induced ATRP. Even in N-doped CDs with mixed types of N atoms, the ratio of pyridinic N has a serious impact on the polymerization rate.
Article
Biochemistry & Molecular Biology
Xiaofei Li, Jing Lu, Zutian Li, Haoyuan Yang, Weiming Li, Yanju Liu, Mingsan Miao
Summary: An electrochemical method for detecting ALP activity through ARGET ATRP was developed in this study, showing good analytical performance and promising applications.
BIOELECTROCHEMISTRY
(2022)
Article
Polymer Science
Kazuya Matsumoto, Akifumi Kawamura, Takashi Miyata
Article
Engineering, Electrical & Electronic
Mayu Hirayama, Kazuhiro Tsuruta, Akifumi Kawamura, Masayuki Ohara, Kan Shoji, Ryuji Kawano, Takashi Miyata
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2018)
Article
Polymer Science
Rinyarat Naraprawatphong, Akifumi Kawamura, Takashi Miyata
Article
Chemistry, Multidisciplinary
Hiroshi Nakaura, Akifumi Kawamura, Takashi Miyata
Article
Engineering, Chemical
Yasuaki Inoue, Yuya Atsumi, Akifumi Kawamura, Takashi Miyata
JOURNAL OF MEMBRANE SCIENCE
(2019)
Article
Materials Science, Multidisciplinary
Chisa Norioka, Yuino Inamoto, Chika Hajime, Akifumi Kawamura, Takashi Miyata
Summary: This paper presents a universal strategy for preparing tough and stretchable hydrogels by adjusting polymerization conditions to increase polymer chain entanglements for energy dissipation. The balance between physical and chemical cross-links is optimized by utilizing entanglements and covalent bonds, respectively, leading to improved mechanical performance of hydrogels for wide practical use.
NPG ASIA MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Akifumi Kawamura, Ayaka Harada, Shunsuke Ueno, Takashi Miyata
Summary: The dual stimuli-responsive gel particles prepared in this study can release drugs under weakly acidic and reducing conditions, providing a new approach for designing intracellular drug delivery carriers.
Article
Materials Science, Biomaterials
Takashi Miyata, Takayuki Namera, Yihua Liu, Akifumi Kawamura, Tetsuji Yamaoka
Summary: In this study, zwitterionic polymer particles with photodimerizable groups were designed and photo-assembled using ultraviolet light irradiation. The assembled particles displayed a bioinert surface and exhibited photoresponsive behavior. These polymer particles have potential applications in biosensors, bioseparation, and cell culture, as well as for modifying and repairing biomaterial surfaces in situ.
JOURNAL OF MATERIALS CHEMISTRY B
(2022)
Article
Chemistry, Multidisciplinary
Takafumi Noguchi, Nobuhiro Akioka, Yuri Kojima, Akifumi Kawamura, Takashi Miyata
Summary: This article investigates photoresponsive polymer films with directly micropatternable surfaces formed by only UV exposure and a decrease in film thickness achieved through photo-crosslinking. This method offers the advantages of simple processes and low costs.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Takashi Miyata, Yasuaki Inoue, Kazuhito Takada, Akifumi Kawamura
Summary: Liquid crystalline polymers (LCPs) have unique structures and properties that make them useful for fabricating optical devices and high-performance fibers. In this study, LCP-g-OEG micelles were synthesized for medical applications, exhibiting temperature-responsive drug release behavior.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Chisa Norioka, Akifumi Kawamura, Takashi Miyata
Summary: The network structures of poly(N-isopropylacrylamide) (PNIPAAm) gels prepared by atom transfer radical polymerization (ATRP) and free radical polymerization (FRP) were compared. It was found that the temperature-responsive shrinkage of the gels depended on the cross-linker content. Dynamic light scattering (DLS) measurement showed that ATRP suppressed inhomogeneity of the gels more effectively than FRP.
Article
Polymer Science
Mitsuhide Sasaoka, Akifumi Kawamura, Takashi Miyata
Summary: Stimuli-responsive core-shell microgels with zwitterionic hydrogel core and temperature-responsive poly[oligo(ethylene glycol)methacrylate-co-2-(2 '-methoxyethoxy)ethyl methacrylate] (P(OEGMA-co-MEO(2)MA)) shell were prepared by inverse miniemulsion RAFT polymerization. A water-soluble block copolymer emulsifier composed of a hydrophilic/lipophilic P(OEGMA-co-MEO(2)MA) block and a hydrophilic PMPC block was used to stabilize the emulsion. The resulting core-shell microgels exhibited stable dispersion in both chloroform and water, and showed temperature-responsive behavior.
Article
Materials Science, Biomaterials
Yuto Toyoshima, Akifumi Kawamura, Yoshinori Takashima, Takashi Miyata
Summary: This study focuses on the preparation of thermoresponsive hydrogels with dynamic molecular binding sites for controlled drug release, which has great potential for applications in drug delivery systems.
JOURNAL OF MATERIALS CHEMISTRY B
(2022)
Article
Polymer Science
Masaaki Okihara, Kohei Okuma, Akifumi Kawamura, Takashi Miyata
Summary: In this study, a photoresponsive tetra-PEG gel that undergoes a phase transition from a sol to a gel state in response to light is reported. The gelation of the tetra-PEG containing photodimerization groups was investigated by varying the polymer concentration and light irradiation time, showing that the elastic modulus of the gel increases with the increase in light irradiation time.
Meeting Abstract
Chemistry, Multidisciplinary
Akifumi Kawamura, Hiroshi Nakaura, Takashi Miyata
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2018)
