Article
Chemistry, Multidisciplinary
Xuan Kan, Jian-Cheng Wang, Zhi Chen, Jia-Qi Du, Jing-Lan Kan, Wen-Yan Li, Yu-Bin Dong
Summary: In this study, a novel type of chiral covalent organic frameworks (CCOFs) was reported for the first time, which can achieve enantioselective photocatalytic reactions. The researchers successfully applied this framework to the photooxidation reaction of sulfides to sulfoxides and the synthesis of (R)-modafinil.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Review
Chemistry, Organic
Meng-Meng Yang, Si Wang, Zhi-Bing Dong
Summary: This paper reviews the different types of asymmetrical reactions with chiral sulfoxide ligands in recent years, as well as a discussion of efficient methods for the preparation of some enantiomerically pure sulfoxides.
SYNTHESIS-STUTTGART
(2022)
Article
Chemistry, Physical
Li Zhao, Piaoping Yang, Song Shi, Guozhi Zhu, Xiao Feng, Weiqing Zheng, Dionisios G. Vlachos, Jie Xu
Summary: Activation of molecular oxygen for selective alcohol oxidation is achieved using a heterogeneous ligand method to prepare a high-efficiency vanadium carbon catalyst. Chemisorbed oxygen and pentavalent vanadium oxide are found to be crucial for catalyst performance. The V-C catalyst activates molecular oxygen to singlet oxygen or its analogue and carries out the reaction through C-H bond activation. The catalyst also shows high efficiency in selectively oxidizing hydroxyl groups in other substrates, providing guidance for the development of nonprecious metal catalysts for aerobic oxidation.
Article
Chemistry, Applied
Tianxiang Gao, Jingnan Zhao, Huinan Sun, Jianing Li, Cunfei Ma, Qingwei Meng
Summary: This paper describes an expeditious and efficient continuous flow process for the synthesis of esomeprazole. Through optimized continuous reaction equipment, the asymmetric sulfoxidation reaction achieved esomeprazole in 98% yield and 98% ee under mild conditions. The introduction of an inert gas significantly reduced residence time in the flow system and enhanced mixing effect, resulting in a more efficient reaction.
ORGANIC PROCESS RESEARCH & DEVELOPMENT
(2023)
Review
Chemistry, Organic
Haimeng Zhu, Chao Wang, Lili Zong
Summary: This review highlights the significant application of sulfoxide compounds bearing unique sulfmyl group in asymmetric organic synthesis and medicinal chemistry, as well as their roles in drug design. Furthermore, the advancements in asymmetric synthesis of chiral sulfoxides over the past decade and the direct asymmetric oxidation methods are summarized in this paper.
CHINESE JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Organic
Maolin Wang, Zhenkai Xu, Yi Shi, Fang Cai, Jiaqi Qiu, Guang Yang, Zan Hua, Tao Chen
Summary: Polymeric nanoreactors functionalized with TEMPO were successfully prepared through self-assembly of amphiphilic bottlebrush copolymers, exhibiting excellent catalytic activities in water. Compared to linear copolymers, the turnover frequency of nanoreactors from bottlebrush copolymers is greatly increased under the same conditions, attributed to the more stable micellar structure.
JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Jiaxin Li, Yajun Chang, Dongze Li, Ligang Feng, Baogang Zhang
Summary: The efficient synergism between high valence state V and Pd nanoparticles enhances their catalytic performance and anti-poisoning ability for alkaline methanol electrooxidation.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Masaru Kondo, Kento Nakamura, Chandu G. Krishnan, Hiroaki Sasai, Shinobu Takizawa
Summary: This study presents recent advances in photoswitchable chiral organocatalysts and their applications in the photomodulation of enantioselective reactions. Under appropriate light irradiation, the E/Z-photoisomerization of the photoresponsive units on the catalysts controls the catalytic activity and/or selectivity of the reactions. The study also elucidates the design, synthesis, and catalytic application of azobenzene BINOL-based photoswitchable chiral phase-transfer catalysts. This account provides insights into the appropriate design of a photoswitchable chiral organocatalyst for achieving good enantioselectivity and photocontrol.
Article
Chemistry, Physical
Lixian Wang, Jin Lin, Qiangsheng Sun, Chungu Xia, Wei Sun
Summary: A series of Mn(I) catalysts with chiral bidentate benzimidazoles derived from easily available amino acids have been developed for asymmetric transfer hydrogenation (ATH), showing high activity and enantioselectivity. These phosphine-free chiral Mn catalysts can efficiently convert bulky substrates into drug intermediate alcohols, with a possible mechanism and enantiocontrol model proposed based on experimental and DFT studies.
Review
Chemistry, Applied
Giovanni Maria Fusi, Silvia Gazzola, Umberto Piarulli
Summary: Transition metal chiral catalysts can have metal stereocenters in different coordination geometries, with stability achieved through the use of multidentate ligands or cyclopentadienyl anions to prevent decomplexation and recomplexation of labile ligands, allowing for highly enantioselective reactions.
ADVANCED SYNTHESIS & CATALYSIS
(2022)
Article
Chemistry, Physical
Yaodong Wang, Lijia Liu, Kexiao Sang, Yudan Wang, Chunhong Zhang, Hongxing Dong, Jianwei Bai
Summary: In this study, a novel porous chiral catalyst support, HCP-AA, was prepared through FeCl3-catalyzed reaction, and metal catalysts were successfully loaded to form HCP-AA-M, showing high enantioselectivities. The results suggest that utilizing inexpensive amino acids to produce porous chiral supports for recyclable high-performance catalysts is an effective strategy.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Inorganic & Nuclear
Xue Bai, Xu Han, Yuxin Wang, Ange Zhang, Yanli Yang, Ying Lu, Shuxia Liu
Summary: Two novel polyoxometalate (POM)-based complexes were synthesized and characterized. The catalytic conversion of sulfide was studied in detail, and complexes 1 and 2 showed high activity and selectivity to sulfoxide, with the advantages of steady reuse and easy recovery.
INORGANIC CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Aravind Vadakkayil, Caleb Clever, Karli N. Kunzler, Susheng Tan, Brian P. Bloom, David H. Waldeck
Summary: The authors demonstrate that imprinting chirality onto oxygen evolution reaction catalysts improves their performance beyond thermodynamic considerations. This is achieved by controlling the spin alignment of reaction intermediates during electrolysis, resulting in increased Faradaic efficiency, decreased reaction overpotential, and a change in the rate determining step. These findings suggest that chirality can be utilized in other reaction pathways and processes.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Mikus Purins, Jerome Waser
Summary: The paper explores the enantioselective diversification of a single starting material by extending the concept of catalytically formed chiral auxiliary from hydrogenation to cyclopropanation and epoxidation reactions. This approach eliminates the need for different chiral catalysts in alkene functionalization and allows for the control of stereochemistry using a catalytically constructed chiral auxiliary.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Polymer Science
Xiuwu Wang, Xiaokang Zhu, Lianpei Zhou, Dongming Qi, Zan Hua, Tao Chen
Summary: Developing controllable catalytic systems is an important research direction in bionanotechnology. This study reports a thermo-responsive polymer-based catalytic nanoreactor that achieves high efficiency and selective oxidation of alcohols to aldehydes by regulating the reaction rate through temperature control.
Article
Business, Finance
Jiancheng Shen, John Griffith, Mohammad Najand, Licheng Sun
Summary: We examine the predictability of market emotions (fear, gloom, joy, optimism) on returns of S&P 500 Index and 10-year Treasury notes futures using VAR and TGARCH models. Our VAR models suggest that one of the four emotions (fear) has predictive power for stock index futures returns. Additionally, we find that joy and optimism measures of emotions influence Treasury futures market returns. Further analysis using a TGARCH model with an emotional sentiment measure (fear) reveals that fear significantly affects market returns and conditional volatility of futures markets.
JOURNAL OF BEHAVIORAL FINANCE
(2023)
Article
Chemistry, Multidisciplinary
Chen Wang, Panlong Zhai, Mingyue Xia, Wei Liu, Junfeng Gao, Licheng Sun, Jungang Hou
Summary: This study reports the reversible reconstruction behavior accompanied by copper dynamic evolution, leading to the formation of high-valent cobalt species in active sites during water-alkali electrolysis. The crucial roles of electronic structure evolution and oxygen-vacancy-site mechanism in catalyst activity are revealed through experimental and theoretical investigations.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zhaozhong Fan, Ruichun Luo, Yanxue Zhang, Bo Zhang, Panlong Zhai, Yanting Zhang, Chen Wang, Junfeng Gao, Wu Zhou, Licheng Sun, Jungang Hou
Summary: Researchers have developed an indium-nickel dual-atom catalyst that exhibits high CO selectivity and achieves a high industrial CO partial current density. The synergistic effect of the dual-sites and oxygen bridge in the catalyst reduces the reaction barrier for *COOH formation and suppresses the undesired hydrogen evolution reaction.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Teng Shao, Yuan Chang, Zhuwei Li, Yurou Song, Dingfeng Jin, Junfeng Gao, Licheng Sun, Jungang Hou
Summary: Artificial photosynthesis is a promising solution for the efficient production of hydrogen peroxide. A chemically bonded and plasmonic Z-scheme junction of WO and CNs was developed for high-performance artificial photosynthesis. This Z-scheme catalyst exhibits a high H2O2 generation rate, even under broad-spectrum response irradiation.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Tianqi Liu, Shaoqi Zhan, Nannan Shen, Linqin Wang, Zoltan Szabo, Hao Yang, Marten S. G. Ahlquist, Licheng Sun
Summary: Inspired by biological systems, a Ru-based molecular water oxidation catalyst was designed to mimic enzymatic framework, utilizing a configurationally labile ligand that acts as both an electron donor and a proton acceptor. Through various analysis and calculations, it was demonstrated that the self-adaptive ligand enables fast catalytic kinetics with a turnover frequency comparable to natural photosynthesis.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Yu Guo, Johannes Messinger, Lars Kloo, Licheng Sun
Summary: O2 formation in photosystem II (PSII) is still not well understood, but the prevailing theoretical model involves a Mn(IV)-oxyl unit in an open-cubane Mn4CaO6 cluster. However, it has been proposed that the S3 state of higher plants lacks an extra ligand, and instead features a penta-coordinate dangler Mn(V)=oxo covalently linked to a closed-cubane Mn3CaO4 cluster. In this study, the researchers explored various possible pathways and found that the nucleophilic oxo-oxo coupling (NOOC) between Mn(V)=oxo and mu 3-oxo is the only feasible mechanism. They described an energetically feasible process starting from the S4 state, involving the formation of peroxide and superoxide, followed by O2 release and a second water insertion.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Jian Du, Dexin Chen, Yunxuan Ding, Linqin Wang, Fei Li, Licheng Sun
Summary: Exploring highly active and durable electrocatalysts for oxygen evolution reaction (OER) is significant to achieve efficient anion exchange membrane (AEM) water electrolysis. In this study, hollow Co-based N-doped porous carbon spheres decorated with ultrafine Ru nanoclusters (HS-RuCo/NC) were developed as efficient OER electrocatalysts. The unique hollow structure with hierarchically porous characteristics contributed to fast mass transport and increased metal site exposure, while the in situ formed RuO2 and Co3O4 exhibited a synergistic effect on enhancing OER performance. The integration of HS-RuCo/NC into an AEM water electrolyzer resulted in improved cell voltage and long-term stability compared to commercial RuO2-based AEM water electrolyzer.
Article
Chemistry, Physical
Xiansheng Li, Mahdi Haghshenas, Linqin Wang, Jing Huang, Esmaeil Sheibani, Shichen Yuan, Xin Luo, Xuehan Chen, Changting Wei, Hengyang Xiang, Glib Baryshnikov, Licheng Sun, Haibo Zeng, Bo Xu
Summary: In this study, we designed a multifunctional small-molecule hole-transporting material (HTM) called X10 for use in perovskite quantum dot light-emitting diodes (Pe-QLEDs). X10 exhibited high hole mobility, good film-forming ability, strong solvent resistance, and defect passivation effect. Pe-QLEDs using X10 as the HTM achieved a promising external quantum efficiency (EQE) of 20.18%, which was 7-fold higher than that of reference HTM-TCTA-based ones (EQE approximately 2.88%). This is the first case where a small-molecule HTM has shown a high EQE over 20% in Pe-QLEDs. Our work provides important guidance for the rational design of multifunctional small-molecule HTMs for high-performance Pe-QLEDs.
ACS ENERGY LETTERS
(2023)
Article
Business, Finance
Zhaobo Zhu, Licheng Sun, Min Chen
Summary: When stocks are trading near their 52-week high, investors have low expectations for future returns. However, for firms with strong fundamentals, investors' expectations are too low, indicating the psychological anchor of the 52-week high. A trading strategy based on fundamental strength and the 52-week high outperforms the unconditional strategy by significantly increasing the average return. Interestingly, this effect is most evident when investor sentiment is high, but not observed among sophisticated institutions and short sellers.
REVIEW OF QUANTITATIVE FINANCE AND ACCOUNTING
(2023)
Article
Chemistry, Multidisciplinary
Rongmei Zhao, Peng Wang, Linqing Wang, Yuanju Zhao, Chenghao Ge, Licheng Sun, Lin Xie, Yong Hua
Summary: This study introduces an innovative approach using an in situ combined dual-hole transport layer with TIPS-Pn to improve the performance of perovskite solar cells (PSCs). The results show that this approach effectively extracts and transports hole carriers, resulting in a significant increase in the average power conversion efficiency of PSCs. Additionally, it improves the stability of PSCs.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zhuofeng Li, Linqin Wang, Tao Wang, Licheng Sun, Wenxing Yang
Summary: Developing alternative electrolysis techniques is crucial for advancing electrocatalysis. Recent studies have shown that pulse electrochemical CO2 reduction reaction (CO2RR) can improve the selectivity of CO2RR. This study reveals that pulse electrolysis improves the C(2+) selectivity of CO2RR through dynamic controls of the surface CuxO/Cu composition.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Zi-Yang Xia, Wei Zhang, Cheng Chen, Hao-Xin Wang, Lin-Qin Wang, Ya-Wei Miao, Xing-Dong Ding, Li-Cheng Sun, Ming Cheng
Summary: In order to overcome the energy loss caused by the valence band offset between Cs2AgBiBr6 and the hole transport layer (HTL), a novel deep-level hole transport material (HTM) was designed and synthesized to optimize the energy level alignment. While the introduction of deep-level HTMs successfully reduced the valence band offset between Cs2AgBiBr6 and HTL, it also increased the valence band offset at the HTL/Au interface, limiting the improvement of the power conversion efficiency (PCE). To further improve the PCE, a gradient energy level arrangement combining the newly developed deep-level HTM with Spiro-OMeTAD was constructed. Through optimization, an impressive PCE of 3.50% with high open-circuit voltage and fill factor was achieved, making it one of the best Cs2AgBiBr6 perovskite solar cells.
Article
Multidisciplinary Sciences
Yilong Zhao, Yunxuan Ding, Wenlong Li, Chang Liu, Yingzheng Li, Ziqi Zhao, Yu Shan, Fei Li, Licheng Sun, Fusheng Li
Summary: Electrocatalytic urea synthesis is a promising alternative to traditional energy-intensive urea synthesis. By stabilizing intermediates of *NO2 and *CO, a CuWO4 catalyst achieves efficient co-reduction of CO2 and NO3- to urea via C-N coupling.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Yue Zhao, Lei Ran, Rui Chen, Yurou Song, Junfeng Gao, Licheng Sun, Jungang Hou
Summary: This study presents an integrated photoanode by grafting covalent triazine frameworks as conjugated molecules on the surface of ferroelectric BaTiO3-x nanorod array, and constructing oxyhydroxide oxygen evolution cocatalyst (OEC). The integrated OEC/CTF/BTO array achieves high photocurrent density and low onset potential, while also exhibiting outstanding stability. The enhanced PEC activity is attributed to the integration of CTF and OEC, which enhances light-harvesting capability, boosts charge carrier mediation, and promotes water oxidation kinetics.
Article
Green & Sustainable Science & Technology
Guoheng Ding, Husileng Lee, Zhiheng Li, Jian Du, Linqin Wang, Dexin Chen, Licheng Sun
Summary: Ni2Fe8/Ni3S2/NF catalyst is fabricated on nickel foam by a simple one-pot hydrothermal reaction, exhibiting high current densities at low overpotential and outperforming noble metal-based catalysts. Coupled with Ni4Mo/MoO2/NF, the AEM-WE device shows high performance and durability, making the catalyst highly efficient and robust.
ADVANCED ENERGY AND SUSTAINABILITY RESEARCH
(2023)
