Article
Chemistry, Multidisciplinary
Qinzhi Quan, Mingyu Ma, Zongtao Wang, Yu Gu, Mao Chen
Summary: An organocatalyzed controlled radical alternating terpolymerization of PFVEs and VEs under visible-light irradiation was developed, allowing the synthesis of a broad scope of fluorinated terpolymers with low dispersities and high chain-end fidelity. This method facilitates tuning the chemical compositions by rationally choosing the type and ratio of comonomers, and also enables temporal control of chain-growth and the preparation of novel fluorinated block copolymers. The versatility of this method was showcased by synthesizing fluorinated alternating terpolymers customized to display a variety of desirable properties for solid polymer electrolyte design, leading to new opportunities in high-performance energy storage devices.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Shuang Liang, Jingyi Hao, Zongheng Gu, Xinchang Pang, Yanjie He
Summary: Semiconducting nanocrystals, such as stable CSBBr3 nanorods, have attracted global research interest in the field of artificial photosynthesis due to their appealing properties and potential in converting solar energy into valuable chemicals. These nanorods exhibit enhanced stabilities under UV irradiation, elevated temperature, and polar solvents, making them promising candidates for photo-induced atom transfer radical polymerization (ATRP). By tailoring their surface chemistry and dimensions, it is possible to manipulate the charge carrier dynamics and enhance the reaction kinetics of the photo-induced ATRP. This research provides fundamental insights for designing efficient nanostructured photocatalysts in artificial photosynthesis and solar energy conversion.
Article
Chemistry, Physical
Changhoon Yu, Jaejung Song, Tae In Kim, Yungyeong Lee, Yonghwan Kwon, Jongkyoung Kim, Jeehun Park, Jinho Choi, Junsang Doh, Seung Kyu Min, Seungho Cho, Min Sang Kwon
Summary: Due to current global environmental concerns, the development of eco-friendly and sustainable polymerization methods is crucial. In this study, the use of Ag2S nanocrystals as photocatalysts enabled the efficient photoinduced energy/electron transfer reversible addition-fragmentation chain-transfer (PET-RAFT) polymerization of acrylic monomers under ambient/aqueous conditions without any additives. The Ag2S nanocrystals exhibited excellent reducing power, water solubility, and biocompatibility, making them promising candidates as photocatalysts for polymer synthesis.
Article
Chemistry, Multidisciplinary
You-Chi Mason Wu, Gloria Chyr, Hyunchang Park, Anna Makar-Limanov, Yuran Shi, Joseph M. Desimone, Zhenan Bao
Summary: This study reports a modular system for the production of degradable and recyclable thermosets via photopolymerization. The system utilizes a polyurethane backbone to impart strong mechanical properties to the plastic, while the use of hemiacetal ester linkages allows for easy degradation. Functional polyurethane diol can be regenerated through a simple purification process.
Article
Chemistry, Applied
Wen-Hu Bao, Zheng Wang, Zhong Cao, Xin-Chang Wang, Xin-Ran Ma, Xian-Yong Yu, Wei-Min He
Summary: A simple and efficient visible-light-initiated cascade reaction was developed for the regioselective construction of N-substituted naphtho[2,1-d]thiazol-2-amines in good to excellent yields. This reaction was carried out under additive-, external photocatalyst-free and ambient conditions, using ambient dioxygen as the sole oxidant.
ADVANCED SYNTHESIS & CATALYSIS
(2021)
Article
Polymer Science
Lei Wang, Pei Huang, Lei Huang, Chuanshuang Chen, Meiwei Qi, Wenfeng Jiang, Chunyang Yu, Shaodong Zhang, Yongfeng Zhou
Summary: A metal-free and visible light-initiated living cationic dark polymerization system has been demonstrated, which exhibits living characteristics and has potential for industrial applications.
Article
Chemistry, Organic
Jin Bai, Sijia Yan, Zhuxia Zhang, Zhen Guo, Cong-Ying Zhou
Summary: A metal-free heterogeneous photocatalysis using inexpensive graphitic carbon nitride (g-C3N4) has been developed for the synthesis of benzothiazoles via intramolecular C-H functionalization/C-S bond formation of thiobenzanilides under visible-light irradiation. This reaction provides high yields of 2-substituted benzothiazoles without the need for a strong base or organic oxidizing reagents, and the catalyst is stable and reusable after five reaction cycles.
Article
Polymer Science
Ryo Takabayashi, Stephan Feser, Hiroshi Yonehara, Ilhyong Ryu, Takahide Fukuyama
Summary: The nitroxide-mediated radical polymerization (NMP) of styrene and butyl acrylate using BlocBuilder MA under continuous flow reaction conditions showed higher conversions and smaller polydispersity index (D) values compared with batch reaction conditions. The addition of a small amount of acetol or malononitrile accelerated the NMP reaction without sacrificing D values. Flow reactors enable the highly controlled synthesis of styrene and butyl acrylate NMP reactions initiated by BlocBuilder MA (BB MA) with additives, and BA-St di-block copolymers were also synthesized.
Article
Polymer Science
Jui-Teng Lin, Jacques Lalevee, Hsia-Wei Liu
Summary: This article presents the kinetics and general features of a photopolymerization system for the first time, based on a proposed mechanism. Analytic formulas were developed to explore new features, including the relationship between free radical photopolymerization efficacy and nanogold production, and the competing procedures of nanogold production and photopolymerization efficacy. The efficacy of photopolymerization is contributed by components from the excited state of copper complex, while nanogold production is contributed by the coupling of components with gold ion.
Article
Polymer Science
Tuyen Bich Thi Nguyen, Tam Huu Nguyen, Thao Phuong Le Nguyen, Cam Hong Thi Nguyen, Viet Quoc Nguyen, Chau Duc Tran, Tam Hoang Luu, Le-Thu T. Nguyen, Thanh Son Cu, Mai Ha Hoang, Ha Tran Nguyen, Quoc-Thiet Nguyen
Summary: Controlled polymerization techniques have improved significantly with the use of light energy to control radical polymerizations. Metal-organic frameworks (MOFs), as a new type of heterogeneous photocatalyst, have shown great potential in achieving controlled polymerization reactions under visible light and natural sunlight, even in the presence of oxygen. The MOF catalyst allows for the preparation of various polymer compositions with high catalytic efficiency and reusability.
JOURNAL OF POLYMER RESEARCH
(2023)
Article
Polymer Science
Sk Arif Mohammad, Subrata Dolui, Devendra Kumar, Md Mehboob Alam, Sanjib Banerjee
Summary: A novel triple stimuli sensitive block copolymer has been synthesized, which responds to changes in temperature, pH, and light, and has the potential to be used in self-healing materials. The polymerization mechanism has been rationalized through density functional theory calculations.
MACROMOLECULAR RAPID COMMUNICATIONS
(2021)
Article
Polymer Science
Seung Yeon Lee, Sunhee Kim, Ye Rim Lee, Jaebeom Lee, Woo Kyung Cho, Kyung-sun Son
Summary: Surface-initiated reversible addition-fragmentation chain transfer polymerization using oxygen (O2-SI-RAFT) was used to impart chiral properties to substrates. Chiral monomers were synthesized and grown onto titanium and glass substrates, forming polymer brushes. The presence of polymer brushes was confirmed through various analyses, including ellipsometry, water contact angles, X-ray photoelectron spectroscopy, and atomic force microscopy. By polymerizing block copolymer brushes through chain extension, the chirality of the polymer brushes grown on glass substrate was confirmed using circular dichroism spectroscopy.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Claire Foerster, Robert Lehn, Enis Musa Saritas, Annette Andrieu-Brunsen
Summary: Precise local polymer functionalization and combination of different functionalities are needed for miniaturization and improvement of artificial nanopore performance. Automated nanopore functionalization based on data-driven nanopore design would be beneficial. Visible light-induced polymerizations using direct laser writing are advantageous and demonstrated in the functionalization of mesoporous silicafilms with two different polymers. Automated laser writing, as well as polymer re-initiation, are achieved, resulting in polymer spots with diameters of 37 and 40 μm using 1-5 seconds for each irradiated spot.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Linda Quach, Subhabrata Dutta, Philipp M. Pfluger, Frederik Sandfort, Peter Bellotti, Frank Glorius
Summary: This study presents a visible-light-promoted strategy for the selective anti-Markovnikov hydrooxygenation of unactivated alkenes. A carefully designed reagent releases a highly reactive and strongly underdeveloped alkoxycarbonyloxyl radical upon reduction, which selectively adds into the alkenes. This methodology expands the toolbox for regioselective hydrofunctionalization and could serve as a complementary strategy to the established hydroboration/oxidation protocol.
Article
Chemistry, Multidisciplinary
Yizhe Liu, Yang Wu, Feng Zhou
Summary: Research on polymer brushes has attracted great interest due to their wide range of applications. However, the weak mechanical strength, especially the low bond strength between the brushes and the substrate surface, is a challenge. Researchers have solved this problem by combining chemical and physical anchoring strength, and developed shear-stable polymer brush surfaces.
Article
Materials Science, Multidisciplinary
Junwoo Lee, Duck Hoon Lee, Younghoon Kim, Jin Young Park, Hyung Ryul You, Taiho Park, Minjun Kim, Jongmin Choi
Summary: A novel benzodifuran-based hole-transporting material (HTM) was synthesized, which exhibited improved optoelectrical properties, solubility, and thermal stability compared to a typical benzodithiophene-based HTM. The benzodifuran-based HTM showed enhanced performance in quantum dot solar cells, achieving higher open-circuit voltage and power conversion efficiency.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Shinbi Lee, Ho-Sub Bae, Wonyong Choi
Summary: The utilization of semiconductor materials for photocatalysis and photoelectrocatalysis has gained popularity in harvesting solar energy. Environmental photo(electro)catalysis, particularly in water treatment, air purification, and resource recovery, has been extensively studied. The activation of water and dioxygen on the semiconductor surface plays a crucial role in controlling the selectivity and efficiency of photoconversion processes, generating radical species and reactive oxygen species for degradation/transformation of pollutants or energy-rich chemicals. This Account highlights recent strategies and functional materials for the effective activation of water and dioxygen in environmental PC/PEC systems.
ACCOUNTS OF CHEMICAL RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Bupmo Kim, Dayoung Kwon, Jin-Ook Baeg, P. Muthu Austeria, Geun Ho Gu, Jeong-Hyeon Lee, Jeehun Jeong, Wooyul Kim, Wonyong Choi
Summary: A new single-atom dual-atom-site catalyst has been developed to significantly promote the production of formaldehyde through the four-electron transfer pathway of *OCHO. The neighboring Sn(II)-Cu(I) dual-atom sites stabilize the intermediates for formaldehyde production, and the adsorbed *HCHO intermediate is detected by in situ Fourier transform infrared spectroscopy. This study provides a unique example of controlling the selectivity of multi-electron transfer mechanisms for CO2 photoconversion using a heteronuclear dual-atom-site catalyst to generate an uncommon product (formaldehyde) from CO2 reduction.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Soumen Dutta, Akshay Gurumoorthi, Shinbi Lee, Sun Woo Jang, Nitee Kumari, Yu-Rim Hong, Wonyong Choi, Chang Yun Son, In Su Lee
Summary: By utilizing few-nm-thin two-dimensional nanocrystals of MOF-5, a crystal lattice-guided wet-chemical etching process has been developed to regulate attractive pore patterns on the MOF surface. The optimized etching process produces size-tunable fractal-pores that enhance the activity and stability of the supported catalyst in photoelectrochemical CO2-to-CO reduction. The long-range fractal opening in the 2D MOF support structure facilitates cross-interface charge transportation and exposure of immobilized Re-I-catalysts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Dae Hwan Lee, Seyeong Lim, Chanhyeok Kim, Han Uk Lee, Dasol Chung, Yelim Choi, Jongmin Choi, Younghoon Kim, Sung Beom Cho, Hong Il Kim, Taiho Park
Summary: Researchers designed three types of dopant-free hole transport materials for perovskite quantum dot solar cells, and the optimized material, Asy-PSeDTS, achieved the highest power conversion efficiency (PCE) and stability among dopant-free HTM-based PQD-SCs so far, maintaining 80% of the initial PCE after 40 days.
ACS ENERGY LETTERS
(2023)
Review
Chemistry, Physical
Zobia Irshad, Wonjong Lee, Muhammad Adnan, Yelim Choi, Taiho Park, Jongchul Lim
Summary: This review discusses the potential of multijunction tandem solar cells in photovoltaic evolution, highlighting key challenges and proposed solutions, particularly focusing on the bandgap energies of light absorbers and charge carrier dynamics. Through comprehensive research from various perspectives, the importance of addressing current-matching issues to promote the development of 2-T TSCs is emphasized.
Article
Chemistry, Physical
Min-Cheol Kim, Jiyong Chung, Tae-Yong An, Jaeyoung Lee, Mi-Kyung Han, Shinbi Lee, Wonyong Choi, Jung Kyu Kim, Sang Soo Han, Uk Sim, Taekyung Yu
Summary: Through a combination of experimental and theoretical work, we demonstrate the catalytic effect of thiourea (TU) in electrochemical NRR. TU reduction leads to the generation of catalytically active carbon sites on the NiS surface, facilitating a more facile NRR pathway. This study presents a new possibility for NRR catalysts based on metal-nonmetal compounds.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Environmental
Miao Wang, Zhe Xu, Zhenlian Qi, Yiwei Cai, Guiying Li, Wonyong Choi, Taicheng An
Summary: Photocatalysis has shown promising results in the inactivation of waterborne pathogens. However, the deactivation mechanism of photocatalysts during bacterial inactivation has not been thoroughly studied. This study investigated the performance of a nickel foam-loaded TiO2 photocatalyst during a 70-cycle bacterial inactivation process. The results showed that the inactivation efficiency decreased with the increase in cycle number, and a deactivation mechanism involving the adhesion of biomolecules to the surface of the photocatalyst was proposed.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Jun-Ho Park, Youjin Reo, Ju-Hyun Jung, Taehyun Kim, Taiho Park, Yong-Young Noh, Cheol-Joo Kim
Summary: In this study, it was demonstrated that the van der Waals contact of aluminum onto a two-dimensional tin halide perovskite significantly enhanced the photoluminescence intensity, reaching a record-high PL quantum yield of 10%. The study emphasizes the importance of controlling electronic doping to optimize luminescence efficiency in low-dimensional perovskites.
ACS ENERGY LETTERS
(2023)
Editorial Material
Engineering, Environmental
Glen Daigger, Xiaoguang Duan, Xuchun Li, Wu-Jun Liu, Mingce Long, Kyoung-Yeol Kim, Jinxing Ma, Brooke Mayer, Rodrigo Braga Moruzzi, Bing-Jie Ni, Sigrid Peldszuz, Virender Sharma, Will Tarpeh, Yen Wah Tong, Qilin Wang, Xiangke Wang, Xuanhao Wu, Yusuke Yamauchi, Yang Yang, Dengsong Zhang, Shujuan Zhang, Yan Zhou, Wonyong Choi, Jingyun Fang, Jaehong Kim, Nancy Love, Mark Saeys, Michael Wong
ACS ES&T ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Dohyun Kim, Hyuntae Choi, Wooteak Jung, Chanhyeok Kim, Eun Young Park, Sungryong Kim, Nam Joong Jeon, Seulki Song, Taiho Park
Summary: In order to improve the efficiency and stability of perovskite solar cells (PSCs), a method of interfacial engineering involving thermal phase transition is used in this study. By liquidizing alkylammonium formates at low temperatures, the perovskite grain boundaries can be effectively modified, leading to enhanced thermal stability and moisture stability of the PSCs. This strategy has successfully achieved highly efficient and stable PSCs.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Engineering, Environmental
Taehyun Kim, Sunyoung Sohn, Sungjin Park, Wanuk Choi, Hyungju Ahn, Sungjune Jung, Taiho Park
Summary: In this study, three asymmetric heavy-atom-free multifunctional triplet-harvesting emitters were synthesized, and the optimized radiative characteristics were achieved through the incorporation of intramolecular hydrogen bonding. The intramolecular hydrogen bonding also enabled various emission properties, such as aggregation-induced emission, mechanochromic luminescence, thermally activated delayed fluorescence, and room-temperature phosphorescence, in the solid state.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Haeryang Lim, Jae-Yeop Jeong, Dae Hwan Lee, Shin-Woo Myeong, Giwon Shin, Dayeong Choi, Won Bae Kim, Sung Mook Choi, Taiho Park
Summary: In this study, a novel aryl ether-free poly(fluorene) anion exchange membranes (AEMs) were developed and their morphology and conformation were analyzed. It was found that PFPB-QA, with the lowest glass transition temperature, exhibited the most oriented structure and well-connected ion transport channels, achieving high conductivity and alkaline stability.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Tae Hwa Jeon, Cheolwoo Park, Unseock Kang, Gun-hee Moon, Wooyul Kim, Hyunwoong Park, Wonyong Choi
Summary: By depositing CN and metal-incorporated CN films on hematite, the photoelectrochemical activity and photocurrent density of hematite-based photoanodes can be significantly improved, along with enhanced Faradaic efficiency for oxygen evolution.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Chuhyung Kim, Soonhyun Kim, Yiseul Park, Wonyong Choi
Summary: This study demonstrates the use of Fe2O3/CNF as a heterogeneous Fenton-like catalyst for simultaneous removal of various organic and inorganic contaminants without the need for external energy input and chemical reagents. The Fe2O3/CNF exhibits notable activities for spontaneous oxidative degradation and reductive transformation in ambient solution, with a synergistic effect for removing dual contaminants.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Multidisciplinary
Xuemei Liu, Chaonan Cui, Shuoshuo Wei, Jinyu Han, Xinli Zhu, Qingfeng Ge, Hua Wang
Summary: This study presents a new strategy for designing efficient photocatalysts that can convert CO2 into hydrocarbons by utilizing synergistic catalytic sites. The findings provide a solution for the selective photocatalytic reduction of CO2 to CH4.
Article
Chemistry, Multidisciplinary
Chengxian Hu, Dan Wang, Lu Wang, Ying Fu, Zhengyin Du
Summary: A novel one-pot, three-component reaction conducted under electrochemical conditions was studied. The reaction involved 2-aminothiophenols, aldehydes, and malononitrile, using TBABF4 as an electrolyte and CuI as a catalyst. The proposed reaction mechanism suggested that CuI served as an electron relay. This method offers simplified operation, high atom economy, and mild reaction conditions.
Article
Chemistry, Multidisciplinary
Zhi Yang, Yu Chen, Linxi Wan, Yuxiao Li, Dan Chen, Jianlin Tao, Pei Tang, Fen-Er Chen
Summary: A highly enantioselective method for the complete hydrogenation of pyrimidinium salts using Ir/(S,S)-f-Binaphane complex as the catalyst was developed. This method provides easy access to fully saturated chiral hexahydropyrimidines, which are prevalent in many bioactive molecules. The reactions exhibit high yields and enantioselectivities under mild reaction conditions without additives. Successful application of this methodology in a continuous flow fashion further extends its practical utility.
Article
Chemistry, Multidisciplinary
Tina Jeoh, Jennifer Danger Nill, Wujun Zhao, Sankar Raju Narayanasamy, Liang Chen, Hoi-Ying N. Holman
Summary: In this study, the enzymatic hydrolysis of cellulose was investigated using real-time infrared spectromicroscopy. The spatial heterogeneity of cellulose was found to impact the hydrolysis kinetics. Hydration affected cellulose ordering, and Cel7A preferentially removed less extensively hydrogen bonded cellulose.
Article
Chemistry, Multidisciplinary
Tiphaine Richard, Walid Abdallah, Xavier Trivelli, Mathieu Sauthier, Clement Dumont
Summary: An effective method of grafting functionalities onto lignin based on glycerol carbonate has been developed using an efficient nickel-catalysed telomerisation reaction. This method allows lignin to have new reactive functions and reduces the glass transition temperatures of modified lignins, thereby expanding the application range of lignin-based resins.
Article
Chemistry, Multidisciplinary
Jing Qi, Xiyan Wang, Gan Wang, Srinivas Reddy Dubbaka, Patrick ONeill, Hwee Ting Ang, Jie Wu
Summary: This study presents a green and environmentally friendly approach for the synthesis of imides using electrocatalytic oxidation with H2O as the oxygen source. The method eliminates the need for toxic or expensive oxidants and achieves high yields under mild reaction conditions. It shows broad substrate compatibility and potential for industrial applications.
Article
Chemistry, Multidisciplinary
Babasaheb Sopan Gore, Lin-Wei Pan, Jun-Hao Lin, Yi-Chi Luo, Jeh-Jeng Wang
Summary: Here, we report a visible light-promoted intramolecular radical cascade reaction for the construction of fluorenol and naphthalene-fused cyclopropyl carbaldehyde derivatives. This method offers mild reaction conditions, a broad substrate scope, excellent step efficiency, and scalability, without the need for external chemical oxidants. The novelty of this protocol was demonstrated by synthesizing chrysene analogs and performing late-stage functionalizations.
Article
Chemistry, Multidisciplinary
Juho Antti Sirvio, Idamaria Romakkaniemi, Juha Ahola, Svitlana Filonenko, Juha P. Heiskanen, Ari Ammala
Summary: This article discusses the method of using supramolecular interaction between an aromatic hydrogen bond donor and lignin to achieve rapid delignification of softwood at low temperatures.
Article
Chemistry, Multidisciplinary
Yunyan Meng, Chunxiang Pan, Na Liu, Hongjiang Li, Zixiu Liu, Yao Deng, Zixiang Wei, Jianbin Xu, Baomin Fan
Summary: A novel visible light-driven synthesis method for 2,3-diamines has been developed, which has mild conditions, avoids the use of metal reagents, and can synthesize diamines and diols in one pot.
Article
Chemistry, Multidisciplinary
Mingqing Huang, Haiyang Huang, Mengyao You, Xinxin Zhang, Longgen Sun, Chao Chen, Zhichao Mei, Ruchun Yang, Qiang Xiao
Summary: A direct air-oxidized strategy for the synthesis of benzo[b]phosphole oxides was developed in this study. Arylphosphine oxides were transformed into phosphinoyl radicals, which were further combined with various alkynes to achieve the desired products. DFT calculations revealed the mechanism of phosphinoyl radical formation.
Article
Chemistry, Multidisciplinary
Anwei Wang, Jiayin Huang, Chunsheng Zhao, Yu Fan, Junfeng Qian, Qun Chen, Mingyang He, Weiyou Zhou
Summary: This study demonstrates an innovative strategy for the aerobic oxidation of C(sp(3))-H bonds using gamma-valerolactone. By optimizing the reaction conditions and utilizing specific catalysts, efficient oxidation of C(sp(3))-H bonds is achieved with good chemoselectivity in certain cases.
Article
Chemistry, Multidisciplinary
Shun Li, Likai Tong, Zhijian Peng, Bo Zhang, Xiuli Fu
Summary: Sulfide compounds show promise as electrocatalysts for water splitting, but their performance is limited by factors such as limited active sites and hindered substance transport. This study successfully prepared a high-entropy sulfide (ZnCoMnFeAlMg)(9)S-8, which reduced grain size and increased specific surface area, enabling the realization of a dual-functional catalyst with multiple catalytic sites. High entropy also modulated the electronic properties of sulfides, reducing the potential energy barrier for hydrolysis. This research introduces a new approach for functionalizing high entropy nanomaterials and improves the performance of water splitting catalysts.
