Article
Chemistry, Inorganic & Nuclear
Dongwon Kim, Junmyeong Park, Gyeongwoo Kim, Soojin Lee, Mohammad Mozammal Hossain, Ok-Sang Jung
Summary: A pair of chiral cages were self-assembled using symmetric chiral ligands, and could be downsized with the presence of hydrochloric acid. The original cages showed better enantioselectivity for chiral recognition, while the downsized cages exhibited significant recognition of chiral molecules through photoluminescence.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Pratikkumar Lakhani, Darshil Chodvadiya, Prafulla K. Jha, Vivek Kumar Gupta, Damian Trzybinski, Krzysztof Wozniak, Krzysztof Kurzydlowski, U. K. Goutam, Himanshu Srivastava, Chetan K. Modi
Summary: A Cu(ii)-salen complex encapsulated in MWW-framework was developed as an efficient chiral organocatalyst for synthesizing 3,4-dihydropyrimidin-2-(1H)-one (DHPMs) derivatives asymmetrically. Various techniques were used to confirm its structural properties. The Cu(ii)-salen complex was optimized to fit into the MWW support while maintaining its chirality through computer-assisted DFT calculations. This organocatalyst exhibited potent catalytic activity and could be reused multiple times without significant loss of activity.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Organic
Mizuki Seki, Kazuhiro Yoshida
Summary: A new chiral rhodium catalyst was synthesized and fully characterized, showing good catalytic activity and enantioselectivity in asymmetric reactions.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Review
Chemistry, Applied
Pawan Kumar, Urvashi Sharma, Guddekoppa S. Ananthnag
Summary: This article provides a detailed overview of the synthesis, reactivity, structural features, and catalytic activities of acyl phosphines and bis(acyl) phosphines reported in the last three decades. Although acyl phosphines have been known historically, their literature is not exhaustive due to the vulnerability of P-C(O) bonds toward nucleophilic substitution reactions. However, there has been a renewed interest in the synthesis of acyl phosphines and di(acyl) phosphines recently, with the examples of phosphines possessing two acyl groups found more frequently in the literature. Transition-metal complexes of acyl phosphines and di(acyl) phosphines have been moderately explored, but their catalytic applications are limited.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Mauro Mato, Marc Montesinos-Magraner, Arnau R. Sugranyes, Antonio M. Echavarren
Summary: A new two-step methodology has been developed for the synthesis of alkynylcyclopropanes, which avoids the usual problems associated with these substrates under metal catalysis. This approach allows for rapid access to a diverse library of alkynylcyclopropanes, including versatile intermediates that previously required lengthier synthetic approaches. Through experiments and DFT calculations, the complete mechanistic picture for the divergent reactivity of alkynylcycloheptatrienes under metal catalysis has been unveiled, explaining the unique selectivity displayed by rhodium(II) complexes.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Ulysse Caniparoli, Imma Escofet, Antonio M. Echavarren
Summary: Planar chiral monodentate 1,3-disubstituted ferrocene phosphines inspired by JohnPhos-type ligands have been synthesized and applied for the enantioselective gold(I) catalyzed [4 + 2] cycloaddition of 1,6-arylenynes. Computational studies elucidated the working mode of the catalyst, involving attractive noncovalent interactions that induce the folding of the substrate in the chiral environment of the ligand.
Article
Materials Science, Multidisciplinary
Liping Lan, Jiajun Ye, Wenxin Ji, Xiong Gao, Lijuan Liu, Yonggang Sun, Yuanyuan Li, Yulong Ma
Summary: In this study, a theoretical investigation was conducted to design an electron-donating ligand, H2bpdc, which was then used to synthesize Rh(I)-H2bpdc catalyst for methanol carbonylation. The catalyst exhibited an asymmetric double-serrate seven-membered ring coordination structure, which resulted in improved catalytic activity by reducing the energy barrier of the rate-determining step. The catalyst performed exceptionally well in terms of yield, selectivity, and stability, making it a promising candidate for industrial applications.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Junqiang Wei, Vincent Gandon, Ye Zhu
Summary: Synthetic application of asymmetric catalysis requires strategic alignment of bond construction and chiral target molecule creation. Remote desymmetrization offers advantages in spatial decoupling of catalytic transformation and generation of stereogenic element. However, this spatial separation presents challenges for chiral catalysts to discriminate distant enantiotopic sites several bonds away from a prochirality center.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Hang-Fei Tu, Alienor Jeandin, Marcos G. Suero
Summary: In this study, a catalytic one-step synthesis of cyclopropenium cations using readily available alkynes and hypervalent iodine reagents as carbyne sources is reported. A novel Rh-carbynoid catalytically generates monovalent cationic carbynes (:C+-R), which are then transferred to alkynes via an oxidative [2+1] cycloaddition, resulting in a new type of ester-substituted CPC. This method allows for regioselective attack of various carbon and heteroatomic nucleophiles, providing a new platform for the synthesis of valuable cyclopropenes that are difficult or impossible to make by current methodologies.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Multidisciplinary Sciences
Jie Wang, Wei-Feng Zheng, Xue Zhang, Hui Qian, Shengming Ma
Summary: This study reports the synthesis of non-readily available enantioenriched tetrasubstituted allenes through rhodium-catalyzed reactions controlled by steric hindrance. Detailed mechanistic experiments and density functional theory studies reveal the mechanism behind the formation of different stereochemistry under different reaction conditions. A stereodivergent protocol to construct the enantiomer of optically active tetrasubstituted allenes from the same starting materials is successfully developed based on these mechanistic understandings.
NATURE COMMUNICATIONS
(2023)
Review
Chemistry, Multidisciplinary
Fei Ye, Zheng Xu, Li-Wen Xu
Summary: The development of highly effective chiral ligands is crucial for enhancing catalytic activity and selectivity in metal-catalyzed asymmetric synthesis. Our group has designed and synthesized a series of new chiral catalysts based on the concept of nonequivalent coordination to access products with excellent chemo-, diastereo-, and enantioselectivity. These ligands have demonstrated good to excellent performance in constructing quaternary carbon/silicon and multiple stereogenic centers with enantioselectivity.
ACCOUNTS OF CHEMICAL RESEARCH
(2021)
Article
Chemistry, Organic
Samuel Lauzon, Laurent Caron, Thierry Ollevier
Summary: This study describes a seven-step synthesis of a chiral 2,2'-bipyridinediol ligand starting from commercially available materials, with the key step being the O-2-mediated oxidative homocoupling reaction. The complexation of Fe-II with the chiral ligand showed an unusual heptacoordination and steric strain caused by the 3,3'-dimethyl groups. Furthermore, asymmetric induction using this ligand was investigated in Mukaiyama aldol and thia-Michael reactions, showing improved chiral induction compared to a catalyst made from a different ligand.
ORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Organic
Jixin Pian, Qingqing Chen, Yujiao Luo, Zhifei Zhao, Jichang Liu, Lin He, Shi-Wu Li
Summary: An enantioselective cyclopropanation reaction of sulfoxonium ylides with beta,gamma-unsaturated ketoesters catalyzed by a chiral rhodium catalyst has been achieved, leading to the synthesis of various optically pure cyclopropanes.
Article
Chemistry, Organic
Morgane Mando, Mathieu Fares, Christelle Kowandy, Fabienne Grellepois, Emmanuel Riguet
Summary: In this study, the synthesis of enantioenriched alpha-aryl-alpha'-allyl-gamma-butyrolactones bearing vicinal tertiary and quaternary stereocenters through organocatalyzed asymmetric allylic alkylation was reported.
Article
Chemistry, Multidisciplinary
Binghui Wang, Yilin Liu, Chenyang Jiang, Zheng Cao, Shanshan Cao, Xiaowei Zhao, Xu Ban, Yanli Yin, Zhiyong Jiang
Summary: Describes a chiral Bronsted acid-catalysed asymmetric hydrophosphinylation of 2-vinylazaarenes by secondary phosphine oxides. P-chiral 2-azaaryl-ethylphosphine oxides are synthesized with high yields and ees, allowing for flexible modulation of substituents. The resulting P-chiral tertiary phosphines from the reduction are confirmed as effective C-1-symmetric chiral 1,5-hybrid P,N-ligands, making these adducts valuable in asymmetric metal catalysis.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Energy & Fuels
Jian Zhang, Huadong Sun, Wenfeng Li, Yuan Jia, Zhiyong Han, Xiangyun Tao
Summary: This article focuses on the fault ride-through ability issue of wind turbine generator in large-scale wind power access to the power system. After analyzing the technical regulations for voltage FRT of WTG in the mainstream wind power markets, the reactive power reversal phenomenon and its reason of direct drive permanent magnet wind turbine during reactive power recovery period after LVRT are introduced. Then, a fast-reactive current control method based on rapid voltage response is proposed to solve the issue.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2023)
Article
Chemistry, Multidisciplinary
Min-Song Wu, Xiao-Yun Ruan, Zhi-Yong Han, Liu-Zhu Gong
Summary: A Pd-catalyzed cascade reaction has been developed for the synthesis of chiral 3,3-disubstituted oxindole derivatives using aryl alpha-diazoamides and allenes. The use of a chromium complex as a Lewis acid catalyst enhances the yield and enantioselectivity of the reaction.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Analytical
Jingruo Wang, Deyi Zhang, Wenna She, Shiyao Gao, Kunjie Wang, Yi Wang, Zhiyong Han, Xuefu Chen, Lan Li
Summary: Compared to traditional transition metal layered double hydroxides, transition metal layered carbonate double hydroxides (TMC-LDHs) have superior electrochemical performance and show great potential for practical application in advanced solid-state supercapacitors. This study successfully synthesized a flower-like TMC-LDH material with high specific capacity and excellent cycle stability using a hydrothermal method. The assembled solid-state hybrid supercapacitor device based on this material delivers high specific energy and retains a significant portion of its initial specific capacity after a large number of cycles.
Article
Engineering, Environmental
Fangming Tian, Jiaojiao Tang, Jie Zeng, Zhen Luo, Lin Zhang, Fenglin Tang, Zhiyong Han, Xiupei Yang
Summary: The sulfidation of microscale zero-valent iron particles (S/mZVI) has been widely recognized as a method to improve reactivity and selectivity. In this study, different types of nickel-sulfidated composite mZVI particles were synthesized by adjusting the sequence of nickel doping and sulfidation. The reactivity and selectivity towards atrazine in groundwater were compared, and the underlying mechanisms were investigated. The results showed that Ni/S-mZVI exhibited higher removal rate of atrazine and reduced hydrogen accumulation compared to S/mZVI. The enhanced removal rate was attributed to the generation of atom hydrogen and direct reduction mediated by electron transfer. Meanwhile, the reduced hydrogen evolution reaction in Ni/S-mZVI can be explained by the involvement of Fe oxides. Overall, the bimetallic modification of S/mZVI is a promising strategy for groundwater remediation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Biomedical
Elaina Atherton, Yue Hu, Sophie Brown, Emily Papiez, Vivian Ling, Vicki L. Colvin, David A. Borton
Summary: This study aimed to understand and mitigate the neuroinflammatory response to neural implants. By using three-dimensional primary neural cultures, the researchers successfully separated the innate and systemic immune responses and created an in vitro model of the device-tissue interface.
JOURNAL OF NEURAL ENGINEERING
(2022)
Article
Chemistry, Physical
Deyi Zhang, Wenna She, Jingruo Wang, Shiyao Gao, Biao Yang, Xianxing Men, Kunjie Wang, Zhiyong Han, Xuefu Chen
Summary: Extending the operating potential of electrolytes is an efficient strategy to improve the energy density of aqueous supercapacitors. In this study, trichloroacetic acid (TCA) is developed as an efficient acid electrolyte with extended operating potential to enhance the energy density of aqueous carbon-based supercapacitors. Additionally, hierarchical porous carbon (HPC) with a high specific surface area is prepared to match the TCA electrolyte. The experimental results demonstrate that the prepared HPC exhibits a high specific capacitance in the TCA electrolyte. The symmetric supercapacitor device based on the prepared HPC and TCA electrolyte shows excellent cycle durability and high energy density.
JOURNAL OF POWER SOURCES
(2022)
Correction
Chemistry, Organic
Shi-Wei Luo, Liu-Zhu Gong, Tian-Ci Wang, Zhi-Yong Han, Pu-Sheng Wang, Hua-Chen Lin
Article
Multidisciplinary Sciences
Qingbo Zhang, Yue Hu, Caitlin M. Masterson, Wonhee Jang, Zhen Xiao, Arash Bohloul, Daniel Garcia-Rojas, Hema L. Puppala, George Bennett, Vicki L. Colvin
Summary: This study characterized the dissolution process and associated biological activity of silver nanoparticles with different dimensions, shapes, and surface chemistries. A quantitative model was developed to relate material structure to silver dissolution and microbial toxicity. The results showed that shape had the most profound influence on antibacterial activity, while surface coatings had the least impact.
Article
Engineering, Environmental
Xingchang Tang, Jingruo Wang, Deyi Zhang, Bing Wang, Xu Xia, Xianxin Meng, Biao Yang, Jianpeng Chen, Yulian He, Zhiyong Han
Summary: Constructing amorphous/crystalline hybrid materials is an effective strategy to enhance the performance of supercapacitors. In this study, carbon cloth-supported amorphous/crystalline hybrid NiCo-sulfide with a unique morphology was successfully constructed by converting crystalline NiCo-sulfide into the amorphous phase. The resulting material exhibited high specific capacity, cycle stability, and rate capability, making it suitable for high-performance supercapacitors.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Xianxin Meng, Deyi Zhang, Bing Wang, Yulian He, Xu Xia, Biao Yang, Zhiyong Han
Summary: A facile microwave irradiation method was developed to convert biomass into a phosphorus-doped hierarchical porous carbon. The material showed high specific capacitance and excellent cyclic stability in a newly developed TFA electrolyte. By replacing traditional H2SO4 electrolyte with TFA electrolyte, the device achieved nearly 2.5-fold improvement in energy density.
JOURNAL OF ENERGY STORAGE
(2023)
Review
Chemistry, Multidisciplinary
Zhi-Yong Han, Liu-Zhu Gong
Summary: Asymmetric Bronsted acid catalysis is a powerful concept for asymmetric synthesis. Chiral bisphosphoric acids have received much attention in the last two decades due to their unique catalytic properties attributed to intramolecular hydrogen bonding interactions. Many structurally unique and effective bisphosphoric acids have been synthesized, exhibiting superior selectivity in a broad range of asymmetric transformations. This review provides an overview of chiral bisphosphoric acid catalysts and their applications in catalyzing asymmetric transformations.
Article
Chemistry, Physical
Xu Xia, Deyi Zhang, Shiyao Gao, Biao Yang, Xianxin Meng, Yulian He, Bing Wang, Zhiyong Han, Kunjie Wang
Summary: If the agglomeration problem is solved, the solid-phase synthesis method can be an effective strategy for preparing transition metal-based energy storage materials. In this study, a convenient one-step in-suit solid-phase synthesis method was developed to fabricate a porous corallite-like NiSe2/CNTs nanocomposite. The nanocomposite exhibited high conductivity, loose porous morphology, small NiSe2 size, and excellent performance in both supercapacitors and sodium-ion batteries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Yue Hu, Federica Rigoldi, Hui Sun, Alfonso Gautieri, Benedetto Marelli
Summary: We used molecular dynamics simulations to find new tetrapeptide sequences with pH-tunable assembly properties by screening all possible histidine-bearing sequences. These tetrapeptides have potential applications in triggering the delivery of bioactive molecules.
CHEMICAL COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Han Zhiyong, Wang Shicheng, Cheng Taotao, Xing Sijia, Wang Zhiping
Summary: Four types of YSZ-based agglomerated powder with different compositions were prepared and their flowability, apparent density, and particle size distribution were investigated. The deposition efficiency and bonding mechanism during atmospheric plasma spraying were analyzed. The results showed that the flowability, apparent density, and particle size distribution of the different powders varied. The adhesion and wrapping effect of the bonding phase were the main factors affecting the deposition efficiency.
RARE METAL MATERIALS AND ENGINEERING
(2022)
Article
Materials Science, Biomaterials
Yue Hu, Qingbo Zhang, Daniel Garcia-Rojas, Vivian Ling, Caitlin M. Masterson, Yidan Bi, Zhen Xiao, Xiaoting Guo, Jake Villanova, Joshua Dunn, Vicki L. Colvin
Summary: The use of reactive polymeric surface coatings can increase the cerium(iii) content of ceria nanoparticles, making them remarkable antioxidants. The length and architecture of the coating polymer can be tailored to enhance the antioxidant capacity of the nanoparticles.
JOURNAL OF MATERIALS CHEMISTRY B
(2022)
