Article
Polymer Science
Wei Wen, Aihua Chen
Summary: By intrachain photo-cross-linking of azobenzene-containing amphiphilic linear block copolymer precursors, photoresponsive liquid crystalline SCJNPs were constructed and their self-assembly behavior in solution was investigated. Non-spherical assemblies were obtained, including lamellae and tubes, under the effect of the liquid crystal driving force. Additionally, photoinduced morphological transformations were observed for assemblies with different azobenzene contents.
Article
Polymer Science
Linh Duy Thai, Thiago R. Guimaraes, Sebastian Spann, Anja S. Goldmann, Dmitri Golberg, Hatice Mutlu, Christopher Barner-Kowollik
Summary: This study introduces linear diblock copolymers (BCPs) consisting of readily accessible and photoswitchable alpha-bisimine units. A novel synthetic approach was used to construct well-defined BCPs with in-chain morphological changes. The resulting BCPs exhibited reversible isomerization under UV irradiation, offering a promising strategy for the preparation of efficient light-responsive materials.
Article
Polymer Science
Yue Yin, Shuwen Chen, Shuyin Zhu, Lixin Li, Dalong Zhai, Dongqi Huang, Juan Peng
Summary: The interplay between microphase separation and cocrystallization in conjugated rod-rod block copolymers was studied by tuning block ratios, solvent evaporation, and thermal annealing temperatures, revealing their impact on physical and optoelectronic properties. The relationship between crystalline structures of P3BT-b-P3DDT and their charge-transport properties was scrutinized, providing insights into how these processes can be tailored to enhance fundamental understanding of conjugated rod-rod BCP systems.
Article
Polymer Science
Jingyu Huang, Aaron Hall, Ivan Jayapurna, Samana Algharbi, Valeriy Ginzburg, Ting Xu
Summary: The study investigated the impact of polymer chain architecture on the assembly of nanoparticles (NPs) in polymer matrices using synthesized block copolymers (BCPs) with a coil polystyrene (PS) block and a comb random copolymer (RCP) block. Different morphologies of BCPs were obtained by varying the volume fractions of the RCP block, showing asymmetrical phase behavior with the addition of NPs. Self-consistent field theory-density functional theory simulations helped to qualitatively describe the observed morphologies and phase transitions in the nanocomposites.
Article
Chemistry, Physical
Xiaoyuan Wang, Sirui Li, Yongqiang Cai
Summary: This study introduces a novel method to calculate the elastic moduli of self-assembled liquid-crystalline bilayers within the self-consistent field theory framework using the asymptotic expansion method, significantly reducing computational cost. Numerical simulations demonstrate the validity and efficiency of the proposed method.
JOURNAL OF PHYSICAL CHEMISTRY B
(2021)
Article
Polymer Science
Yaping Wang, Dengwen Hu, Xiaohua Chang, Yutian Zhu
Summary: Shape-tunable particles in response to external stimuli have great potential in catalysts, sensors, and clinical systems. In this study, temperature-responsive particles were generated by incorporating poly(N-isopropylacrylamide) into the self-assembly of block copolymers within confined emulsion droplets. The particles transformed from raspberry-like to onion-shaped and back again, driven by the temperature-mediated hydrophobic-hydrophilic transition. This reversible shape transformation has promising applications in temperature-triggered drug release.
Article
Materials Science, Multidisciplinary
Phong H. Nguyen, Angelique M. Scheuermann, Andrei Nikolaev, Michael L. Chabinyc, Christopher M. Bates, Javier Read de Alaniz
Summary: Incorporating light-responsive azobenzene into polyelectrolytes allows for the control of conductivity by utilizing photoinduced changes in steric interactions and polarity. The reversible isomerization of the azobenzene moiety leads to a significant change in ion conductivity, and this change depends on the polymer composition. These findings suggest that azobenzene can serve as a versatile functional unit for regulating the conductivity of polymeric materials using light.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Polymer Science
Shuo-Feng Liang, Chen Nie, Jie Yan, Qi-Jin Zhang, Si Wu
Summary: Photoinduced reversible liquefaction and solidification of polymers allow for processing and healing of polymers using light. Two types of photoinduced liquefaction properties have been observed in azobenzene-containing polymers: reversible solid-to-liquid transition and directional photofluidization. This technology has shown promising progress and applications in the field of polymer materials.
CHINESE JOURNAL OF POLYMER SCIENCE
(2021)
Article
Chemistry, Physical
Dmitry Migulin, Yulia Vysochinskaya, Mikhail Buzin, Artem Bakirov, Georgij Cherkaev, Olga Shchegolikhina
Summary: The newly developed stereoregular azobenzene-cyclosiloxane conjugates exhibit dependency on their molecular structures in terms of the kinetics and thermodynamics of nondegradative reversible trans-cis photoisomerization processes. Room temperature UV irradiation leads to a photoliquefaction effect, while visible light and heating reverse the process. These tetra-azobenzene substituted cyclosiloxane compounds show promising potential for the development of new hybrid smart materials.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2021)
Article
Polymer Science
Yao Sun, Fei Gao, Yuan Yao, Haibao Jin, Xinxin Li, Shaoliang Lin
Summary: A simple and robust strategy for light-induced reversible hierarchical self-assembly of block copolymers is presented, involving a two-step self-assembly process driven by solvent. The process is accompanied by reversible fluorescence, encapsulation, and controlled release, serving as a template for nanoparticle synthesis. This light-enabled reversible hierarchical self-assembly holds potential as a platform for smart delivery vehicles and nanomaterial templates.
Article
Chemistry, Multidisciplinary
Zhifeng Xiao, Hannah F. Drake, Gregory S. Day, Jason E. Kuszynski, Hengyu Lin, Haomiao Xie, Peiyu Cai, Matthew R. Ryder, Hong-Cai Zhou
Summary: This study investigates photoinduced phase transitions in metal-organic frameworks by incorporating phenothiazine as a photoresponsive unit. The reversible structural transition and mechanisms underlying the phase transition are systematically studied. The findings highlight the significance of phenothiazine in photoresponsive materials and provide inspiration for the design and understanding of next-generation photoresponsive metal-organic materials.
CELL REPORTS PHYSICAL SCIENCE
(2022)
Article
Chemistry, Physical
Muhammad Younis, Jonathan Long, Shan-Qing Peng, Xiao-Song Wang, Chunpeng Chai, Nicolas Bogliotti, Mu-Hua Huang
Summary: A new series of N-linked MCPABs were successfully synthesized via fast NaBH4-mediated reductive coupling polymerization on N-substituted bis(4-nitrophenyl)amines, showing promising potential for acid vapor and base vapor sensing. This was characterized by comprehensive solid-state NMR experiments and the color change of azo bonds in MCPABs in response to acid and base vapors was observed.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Polymer Science
Jiacheng Zhang, Shanlong Li, Yucheng Yin, Luoxing Xiang, Fugui Xu, Yiyong Mai
Summary: This study reports the self-assembly of a copolymer into helical nanowires through pi-pi stacking and solvophobic interaction. The chirality of the nanowires is found to be tunable by adding different chiral compounds. This research is significant for expanding the library of ordered self-assembled structures of alternating copolymers and constructing helical supramolecular structures.
MACROMOLECULAR RAPID COMMUNICATIONS
(2022)
Article
Polymer Science
Guangyao Li, Mingcong Xu, Siyu Zhang, Guang Yang, Wei Li
Summary: Chirality plays a vital role in the design of new chiroptical smart materials, and the induction and modulation of supramolecular chirality with feasible techniques is of great value. In this study, two types of azobenzene side-chain polymers were synthesized, and the length of spacer and azobenzene chromophores were found to be crucial in chirality transfer and modulation. The supramolecular chiral arrangement of one polymer could be completely controlled and reversibly modulated, while the chiroptical properties of the other polymer could be reversibly modulated by UV light and thermal annealing treatment. These findings provide insights for designing photo-switchable functional materials.
MACROMOLECULAR RAPID COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
David Siniscalco, Laurence Pessoni, Laurent Billon, Anne Boussonniere, Anne-Sophie Castanet, Jean-Francois Bardeau, Pierre Nickmilder, Philippe Leclere, Nicolas Delorme
Summary: This study introduces a new method to accurately measure the photoinduced reversible solid-to-liquid transition temperature of polymers. By testing polymers with different chemical structures, the researchers aim to understand the variations in experimental irradiation conditions that affect the solid-to-liquid transition. The accurate characterization of the transition paves the way for optimizing polymer design for better photocontrol of mechanical properties.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Polymer Science
Isaac Shin, Kyu Hyo Han, Seung Keun Cha, Sang Ouk Kim, Myungeun Seo
Summary: In this study, a functional block copolymer PMATA-b-PS was synthesized and used as a template for patterning Ag nanoarrays. The experiment successfully demonstrated the fabrication of Ag nanoparticle arrays through selective association with PMATA cylinders and removal of the organic polymer layer.
Article
Chemistry, Multidisciplinary
Jeonghyeon Lee, Myungeun Seo
Summary: The study successfully stabilized a structure with a pore size of 1.1 nm by maximizing cross-linking density and increasing the interaction parameter, using polymerization-induced microphase separation (PINS) combined with hyper-cross-linking as a strategy.
Article
Polymer Science
Jiyun Nam, Sangwoo Kwon, Yong-Guen Yu, Ho-Bin Seo, Jae-Suk Lee, Won Bo Lee, YongJoo Kim, Myungeun Seo
Summary: Inspired by protein folding, a methodology was developed for the precision synthesis of hairy polymer nanoparticles, achieving unprecedented control over structural parameters. The molecular information written on the 1D graft copolymer was translated into the 3D globular polymer nanoparticle through a single-chain collapse process, similar to protein folding. Different side chains formed distinct subdomains in the sterically congested nanoparticle state and further self-assembled into micellar aggregates in a selective solvent.
Article
Chemistry, Multidisciplinary
Jun Su Kang, Sungwoo Kang, Jong-Min Suh, Soon Mo Park, Dong Ki Yoon, Mi Hee Lim, Woo Youn Kim, Myungeun Seo
Summary: The study shows that circularly polarized light can induce chirality at the supramolecular level, and the chirality information can be nonlinearly amplified in the system. Opposite chirality can override molecular information when the enantiomeric excess is low.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Review
Polymer Science
Jun Su Kang, Namhee Kim, Taehyung Kim, Myungeun Seo, Byeong-Su Kim
Summary: This review discusses the introduction of asymmetry into a supramolecular system via external chiral stimuli and the mechanisms of photon-to-matter chirality transfer at the supramolecular level. It also covers asymmetric photochemical reactions and the creation of a chiral bias upon CPL irradiation.
MACROMOLECULAR RAPID COMMUNICATIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Yeolib Jeong, Minjoong Shin, Myungeun Seo, Hyunwoo Kim
Summary: The stereoselective synthesis of polylactic acid (PLA) was achieved using titanium(IV) complexes and specific ligands. Density functional theory calculations showed that the ligand structure plays a crucial role in differentiating reaction pathways.
Article
Polymer Science
Nam Young Ahn, Sangwoo Kwon, Suchan Cho, Chanhyuk Kang, Jiwon Jeon, Won Bo Lee, Eunji Lee, YongJoo Kim, Myungeun Seo
Summary: Supramolecular polymerization, which involves the association of monomeric building blocks through non-covalent interactions, can spontaneously drive the polymerization of nanoscale micellar objects. By constructing patchy micelles through polymerization-induced self-assembly, we observed the formation of 1D supermicellar chains, with the length growing as the degree of polymerization increases. This study demonstrates the feasibility of using polymerization-induced supramolecular polymerization for the autonomous preparation of hierarchical nanostructures.
Article
Multidisciplinary Sciences
Minjoong Shin, Hayeon Kim, Geonhyeong Park, Jongmin Park, Hyungju Ahn, Dong Ki Yoon, Eunji Lee, Myungeun Seo
Summary: This study demonstrates that a periodic order can spontaneously arise from a binary random copolymer and induce recurrent folding of a self-assembled bilayer structure in water. The authors constructed a linear backbone with hydrophilic and hydrophobic side chains by random copolymerization. When the polymer chains associate in water, they experience a sequence matching problem due to heterogeneity, which is stabilized by the periodic folding of the bilayer.
NATURE COMMUNICATIONS
(2022)
Article
Polymer Science
Jaemin Park, Jiyun Nam, Myungeun Seo, Sheng Li
Summary: This study reports the synthesis and self-assembly of brush-linear diblock copolymers with variable side-chain length and density. By controlling the PEG chain length and the degree of substitution, brush-linear diblock copolymers with different side-chain lengths and densities were obtained. The study found that different solid-state morphologies can be formed at different PEG side-chain densities.
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
Chemistry, Multidisciplinary
Kyoungmun Lee, Hyun-Ro Lee, Young Hun Kim, Jaemin Park, Suchan Cho, Sheng Li, Myungeun Seo, Siyoung Q. Choi
Summary: This study demonstrated the continuous generation of hydroxyl radicals in oil-confined aqueous microdroplets, enabling the synthesis of polymers at high reactant concentrations. The transport of hydroxyl radicals also facilitated polymerization reactions in the continuous oil phase. This interfacial phenomenon was successfully applied to the chain extension of polymers.
ACS CENTRAL SCIENCE
(2022)
Article
Polymer Science
Chinnadurai Satheeshkumar, Howon Seo, Sujung Hong, Pilhan Kim, Myungeun Seo
Summary: In this study, a synthetic route based on radical polymerization was developed to produce a fluorescent monolithic hierarchically porous polymer composed of extended pi-conjugated triphenylene motifs. Microphase separation and removal of polylactide generated controllable mesopores and exposed micropores within the polymer network. The resulting porous monolith exhibited strong bluish fluorescence, which could be quenched upon exposure to nitroaromatic compounds.
Review
Polymer Science
Taeseok Oh, Suchan Cho, Changsu Yoo, Wonjune Yeo, Jinyeong Oh, Myungeun Seo
Summary: Polymerization-induced microphase separation (PIMS) is a method for synthesizing nanostructured block polymer materials, allowing for simultaneous nanostructuring during polymerization. PIMS, with its in situ cross-linking feature, offers a facile route to nanostructured block polymer thermosets in combination with various polymerization techniques.
PROGRESS IN POLYMER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Jongmin Park, Eunsook Park, Siyoung Q. Choi, Jingxian Wu, Jihye Park, Hyeonju Lee, Hyungjun Kim, Haeshin Lee, Myungeun Seo
Summary: Bioadhesives are becoming increasingly important in medical science. However, developing adhesive materials that combine strong adhesion, biocompatibility, and biodegradation remains challenging. In this study, a biocompatible and biodegradable block copolymer-based waterborne superglue was developed for follicle-free hair transplantation. The adhesive showed step-wise increase in adhesion strength and significantly enhanced mechanical properties compared to the conventional formulation.
Review
Polymer Science
Ki Hyun Kim, Jiyun Nam, Jinwoong Choi, Myungeun Seo, Joona Bang
Summary: Bottlebrush polymers are unique macromolecules with densely grafted polymeric sidechains, showing interesting properties and applications. The ROMP technique allows precise control of various structural parameters in BBPs. This review highlights recent advances in BBPs prepared by ROMP.
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)
