Article
Chemistry, Physical
P. Hima, M. Vageesh, Michele Tomasini, Albert Poater, Raju Dey
Summary: A transition metal-free synthesis of quinazoline derivatives from 2-aminobenzyl alcohols and aryl amides using a potassium tertiary butoxide-promoted alcohol dehydrogenation strategy is reported. Control experiments were conducted to identify reaction intermediates and the role of the K+ ion. DFT calculations uncovered the reaction mechanism, focusing on the rate-determining state. This method tolerates various functional groups, providing easy access to diversely substituted quinazolines.
MOLECULAR CATALYSIS
(2023)
Article
Multidisciplinary Sciences
Hong Chen, Lin Zhu, Chen Xue, Pinlei Liu, Xuerong Du, Kaichuan Wen, Hao Zhang, Lei Xu, Chensheng Xiang, Chen Lin, Minchao Qin, Jing Zhang, Tao Jiang, Chang Yi, Lu Cheng, Chenglong Zhang, Pinghui Yang, Meiling Niu, Wenjie Xu, Jingya Lai, Yu Cao, Jin Chang, He Tian, Yizheng Jin, Xinhui Lu, Lang Jiang, Nana Wang, Wei Huang, Jianpu Wang
Summary: By introducing an organic additive into the precursor solutions, trap states can be reduced, enhancing the photoluminescence quantum efficiency of metal halide films and increasing the surface potential to facilitate hole injection and transport in LEDs. Therefore, lead-free metal halide LEDs show high brightness and efficiency, making them promising for solution-processed white LED applications.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Organic
Jing Zhang, Ye-Xing Hou, Yan-Liu Tang, Ji-Hang Xu, Zi-Kui Liu, Yang Gao, Xiao-Qiang Hu
Summary: This convenient DMAP-catalysed decarboxylative amination allows for the sustainable synthesis of a wide range of aryl and alkyl amines in useful to good yields without the use of any activating reagent or external oxidant under transition-metal-free conditions. The synthetic potential of this methodology is demonstrated through late-stage modification of bioactive acids and concise synthesis of carbamate and ureas.
ORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Physical
Yongxing Wang, Tianyu Gao, Yaowei Lu, Yinghao Wang, Qiue Cao, Wenhao Fang
Summary: A magnetically recoverable RuCo bimetallic catalyst has been developed for the hydrogenation of furfural to furfuryl alcohol. The catalyst demonstrated high conversion of furfural to furfuryl alcohol, excellent stability during recycling, and easy recovery through magnetic separation.
GREEN ENERGY & ENVIRONMENT
(2022)
Article
Chemistry, Applied
Zhaozhao Sun, Huawen Huang, Qiaolin Wang, Guo-Jun Deng
Summary: This report presents a visible-light-mediated hydroalkylation reaction of alkenes using aldehydes as alkyl sources via bromo radical-promoted photoredox decarbonylation. The protocol offers an alternative approach to C(sp(3))-C(sp(3)) bond formation, featuring mild and clean reaction conditions, obviation for transition-metal catalyst, and good functional group compatibility.
ADVANCED SYNTHESIS & CATALYSIS
(2022)
Article
Chemistry, Multidisciplinary
Jinhui Xu, Jilei Cao, Xiangyang Wu, Han Wang, Xiaona Yang, Xinxin Tang, Ren Wei Toh, Rong Zhou, Edwin K. L. Yeow, Jie Wu
Summary: This article discusses the unprecedented discovery that a family of fluorophores can undergo consecutive photoinduced electron transfer (ConPET) to achieve very high reduction potentials. One of the newly synthesized catalysts can activate reductively recalcitrant aryl chlorides under mild conditions, producing valuable organic synthesis products.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Engineering, Chemical
Hua Chen Wu, Nguyen Nhat Huy, Eilhann Kwon, Jia-Yin Lin, Attasak Jaree, Jechan Lee, Suresh Ghotekar, Xiaoguang Duan, Duong Dinh Tuan, Kun-Yi Andrew Lin
Summary: This study demonstrates for the first time the oxidation of VAA to VNL using a carbon-based material as a metal-free catalyst in the absence of any oxidizing reagents. At 130 degrees C for 2 h, a high conversion efficiency and selectivity of VAA to VNL can be achieved.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2022)
Article
Chemistry, Organic
Chunhua Ma, Zhiwen Feng, Jing Li, Dandan Zhang, Wei Li, Yuqin Jiang, Bing Yu
Summary: A general transition-metal-free photocatalytic decarboxylative 3-alkylation reaction of 2-aryl-2H-indazoles was developed under visible-light irradiation using dimethyl carbonate as a green solvent, 4CzIPN as a photocatalyst, and alkyl N-hydroxyphthalimide esters as alkylating reagents. Various alkylated 2-aryl-2H-indazoles were synthesized in moderate to good yields, and the protocol was successfully applied to the late-stage modification of drug molecules.
ORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Physical
Ye Zheng, Jaime A. Martinez-Acosta, Mohammed Khimji, Luiz C. A. Barbosa, Guy J. Clarkson, Martin Wills
Summary: Aromatic ketones with ortho-substituents showed high enantioselectivity under asymmetric transfer hydrogenation conditions, while N-methylimidazole-containing ketones exhibited unexpected enantioselectivity switches upon variation of the opposing aromatic group. Pyrrole-containing ketones were found to be resistant to reduction in this study.
Article
Chemistry, Multidisciplinary
Zhiqiang Liu, Goutam Kumar Kole, Yudha P. Budiman, Ya-Ming Tian, Alexandra Friedrich, Xiaoling Luo, Stephen A. Westcott, Udo Radius, Todd B. Marder
Summary: A novel protocol for transition metal-free 1,2-addition of polyfluoroaryl boronate esters to aldehydes and ketones provides various secondary alcohols, tertiary alcohols, and ketones. Control experiments and DFT calculations suggest the importance of ortho-F substituents on the boronates and K+ counterion in the base. This procedure uses commercially available starting materials and has a broad reaction scope, yielding moderate to excellent results with a variety of carbonyl compounds.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Organic
Fei Wang, Ying Chen, Lutz Ackermann, Shun-Yi Wang
Summary: In this study, a selective cross-coupling reaction between unactivated alkyl bromides and diaryl tellurides was achieved using reductive nickel catalysis, leading to the synthesis of unsymmetrical alkyl-aryl tellurides with mild reaction conditions, high yields, easily accessible substrates, and a broad substrate scope.
ORGANIC CHEMISTRY FRONTIERS
(2022)
Review
Chemistry, Multidisciplinary
Li Wang, Haiyan Wang, Helong Huang, Tianqi Yun, Chunshan Song, Chuan Shi
Summary: This review discusses strategies for modulating the structure and properties of transition metal carbides (TMCs) to achieve desired products in CO2 hydrogenation. By manipulating the metal/carbon ratio or atomic arrangement, incorporating heteroatoms to construct TMC composites, enhancing the dispersion of TMC nanoparticles, and in situ generation of TMCs, the catalytic behavior of TMCs can be fine-tuned.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Ramavath Babu, Iago Lopez-Fernandez, Seelam Prasanthkumar, Lakshminarayana Polavarapu
Summary: Metal ion-doped Cs(3)ZnI(5) single crystals are primary color (violet, green, and orange/red) emitters with high photoluminescence quantum yields (PLQYs), including 100% PLQY for bright green emission with Mn doping, 57% PLQY for blue emission with Cu doping, and 64% PLQY for red emission with Sn doping. In addition, high Mn doping results in white light emissive crystals, which is the first demonstration of white light emission from an inorganic system. All colored single crystals exhibit high long-term stability and thermal stability up to 600℃.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Green & Sustainable Science & Technology
Hua-Chen Wu, Young-Kwon Park, Jia-Yin Lin, Bui Xuan Thanh, Attasak Jaree, Wei-Hsin Chen, Chia-Hua Lin, Siming You, Kun-Yi Andrew Lin
Summary: This study proposes activated carbon fiber (ACF) as a highly effective catalyst for the conversion of vanillic alcohol (VLA) to vanillic aldehyde (VAE) without using metals and oxidizing agents. The results show that reactive oxygen species derived from ACF-mediated aerobic reactions are responsible for the oxidation of VLA to VAE.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Environmental
Ming Zhao, Liang Zhao, Jing-Pei Cao, Wei Jiang, Jin-Xuan Xie, Chen Zhu, Si-Yi Wang, Yu-Lei Wei, Xiao-Yan Zhao, Hong-Cun Bai
Summary: Lignin-derived compounds provide a platform for the production of value-added chemicals. In this study, a catalytic reaction using metal phosphide (Pd-Ni-P) was reported for the conversion of diphenyl ether to cyclohexanol via a partial hydrogenation-hydrolysis-hydrogenation pathway. The Pd-Ni-P catalyst showed high selectivity and productivity in converting diphenyl ether to cyclohexanol, and similar reactions were observed for other lignin-derived compounds.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Mathematical & Computational Biology
Jianping Qu, Abdul Nasir, Sami Ullah Khan, Kamsing Nonlaopon, Gauhar Rahman
Summary: This article presents an innovative DM algorithm based on fuzzy set theory which can handle uncertainty. The algorithm is validated through its application in a clustering problem.
COMPUTATIONAL INTELLIGENCE AND NEUROSCIENCE
(2022)
Article
Chemistry, Physical
Shipeng Yue, Jianping Qu, Guoliang Li, Shichao Liu, Zhongkai Guo, Jinchuan Jie, Shengli Guo, Tingju Li
Summary: The present study comprehensively investigated the effect of C micro-alloying on the microstructure evolution and properties of Cu-20Fe metastable immiscible alloy. The results show that the microstructure of the Cu-Fe alloy is highly sensitive to the C content. C micro-alloying promotes liquid-liquid phase separation and deteriorates the soft magnetic properties but improves the wear resistance of the Cu-Fe alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Wenshu Zhang, Jianping Qu, Xudong Wang, Hao Huang, Man Yao
Summary: The number of MXene layers is crucial for their performance as anode materials in sodium-ion batteries. Ti-based nitride MXenes with different layers were studied, and it was found that nitride MXenes exhibit better rate capability compared to carbide MXenes of the same thickness. Among them, Ti2NO2 MXene shows the best performance. The performance improvement of nitride MXene is not linear with thickness, and Ti3N2O2 MXene performs relatively weaker.
Article
Nanoscience & Nanotechnology
Shipeng Yue, Guoliang Li, Jianping Qu, Shichao Liu, Zhongkai Guo, Jinchuan Jie, Shengli Guo, Tingju Li
Summary: In this work, cold drawing deformation was used to improve the strength and electrical conductivity of Cu-20Fe alloy. The microstructure evolution and strengthening mechanisms, as well as the variation in conductivity were investigated. It was found that both Cu matrix grains and Fe-rich dendrites could be refined and transformed into fibrous structure with increasing drawing strain. The resulting alloy exhibited a yield strength of 1173 MPa and an electrical conductivity of 41 %IACS.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Organic
Si-Da Wang, Bo Yang, Hao Zhang, Jian-Ping Qu, Yan-Biao Kang
Summary: In this study, a variety of (hetero)aryl chlorides, bromides, and iodides were reduced to corresponding (hetero)arenes under the irradiation of 407 nm LEDs using sodium formate as reductant and thiol as hydrogen atom transfer agent. The key intermediates, aryl radicals, could be trapped by either hydrogen, phosphite, or borates. The same reduction conditions can also be used for the deprotection of sulfonamides.
Article
Chemistry, Physical
Wenshu Zhang, Xin Jin, Jianping Qu, Siyang Liu, Fangyuan Hu, Xudong Wang, Hao Huang, Man Yao
Summary: Heterostructures composed of transition-metal dichalcogenides and MXene exhibit excellent performance as Na-ion batteries anodes. MoSe2/MXene is shown to have better electrochemical performance than MoS2/MXene. However, MoSeS/MXene performs poorly in overall performance tests.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Mechanical
Bowen Dong, Gaoyu Peng, Zhenpeng Wu, Xingrun Shan, Chengjun Guo, Junwei Miao, Jianping Qu, Wenyan Luo, Jinchuan Jie, Tingju Li
Summary: By studying the Cu-14.7Ni-3.1Al (wt.%) alloys, it was found that with the decrease of aging temperature from 973 K to 773 K, the size of (Ni, Cu)3Al precipitates (L12) in the Cu-rich solid solution (FCC) decreased. The simultaneous increase of tensile strength (from 563 MPa to 729 MPa) and ductility (from 5.4% to 13.5%) was observed. A CALPHAD-MD coupled method was proposed to quantitatively reveal the relationship between microstructures and mechanical properties of the precipitation-strengthening Cu-Ni-Al alloy.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Chemistry, Organic
Yong-Ze Chen, Ting-Hui Ding, Qiang-Qiang Li, Jian-Ping Qu, Yan-Biao Kang
Summary: A direct dehydrogenative C-H cleaving carbonylative lactamization of 2-arylanilines promoted by visible light and potassium bases is reported. Solvent DMF acts as the sole carbonyl source in the absence of an oxidant. The irreversible release of hydrogen gas drags this reaction to the stable phenanthridinone products. This method provides a direct conversion of a broad range of 2-arylanilines to various phenanthridinones, which could be applied in the synthesis of bioactive molecules and organic optoelectronic materials.
Article
Chemistry, Organic
Xian-Peng Cai, Bin-Hong Han, Fu-Tong Cen, Jian-Ping Qu, Yan-Biao Kang
Summary: CBZ6 is a redox-neutral non-donor-acceptor-type organo-photocatalyst with a strong reductive potential (-2.16 V vs SCE). It can function as a photosensitizer for both single-electron transfer and triplet energy transfer processes, allowing for site-selective control in the intramolecular hydroarylation of acrylamides. This process provides a concise and environmentally sustainable access to a series of oxindoles and dihydroquinolinones without the use of transition metals, halogen-containing reagents, or additional reductants or oxidants.
Article
Chemistry, Organic
Guo-Qing Jiang, Bin-Hong Han, Xian-Peng Cai, Jian-Ping Qu, Yan-Biao Kang
Summary: An iron-catalyzed direct aerobic alpha,beta-dehydrogenation of carbonyls has been reported using tert-butyl nitrite and N-hydroxyphthalimide as the co-catalyst system. This method allows for the production of a wide range of lactams, flavanones, lactone, and thiochromen-4-one in high yields without the need for extra transition metal reagents.
Article
Biochemistry & Molecular Biology
Jian-Yu Wang, Qiu-Yue Li, Li Ren, Cheng Guo, Jian-Ping Qu, Zheng Gao, Hui-Fang Wang, Qian Zhang, Bo Zhou
Summary: Octanoic acid is a nematicide that affects the energy metabolism, lifespan, and signaling of Meloidogyne incognita. It primarily targets the cuticle, lysosomes, and extracellular regions of the nematodes. Nematodes can tolerate low concentrations of octanoic acid by up-regulating defense enzymes and alternative metabolic pathways.
PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY
(2023)
Article
Chemistry, Organic
Bin-Hong Han, Yu Sun, Xian-Peng Cai, Jian-Ping Qu, Yan-Biao Kang
Summary: Salicylaldehyde is found to be an efficient photocatalyst for the intermolecular transalkylation of phthalimide in this study. The well-designed dimethyl N-hydroxyphthalimide ester serves as a good alkylation reagent, inhibiting the competing intramolecular alkylation of the alkylating reagent and enabling the site-specific synthesis of N-substituted phthalimide.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Organic
Yong-Ze Chen, Yi-Ming Chen, Yuan Hu, Jian-Ping Qu, Yan-Biao Kang
Summary: This study reports a tandem transalkylation-cyclization reaction catalyzed by the super organoreductant CBZ6, using amines as traceless radical donors and stabilizers. The breaking of an N-C bond in the later stage allows transalkylation with a secondary amine as the leaving group. Various tertiary amines were successfully employed as alkyl radical donors. Additionally, the use of this traceless stabilizer enables transalkylation with methyl radical, which is typically unstable and difficult to use.
Article
Chemistry, Organic
Xian-Chao Cui, Hu Zhang, Hao Zhang, Yi-Ping Wang, Jian-Ping Qu, Yan-Biao Kang
Summary: A method for synthesizing a-hydroxyl and a-amino pyridinyl esters via photoreductive dual radical cross-coupling catalyzed by the super-organoreductant CBZ6 has been developed. Wide range of 2-pyridinylation and 4-pyridinylation reactions of either a-ketoesters or imine derivatives have been achieved. Applications in the synthesis of pyridinyl amino-hydroxyl acids as well as a new chiral oxazoline ligand have also been accomplished.
Article
Chemistry, Organic
Yong-Ze Chen, Ting-Hui Ding, Qiang-Qiang Li, Jian-Ping Qu, Yan-Biao Kang
Summary: This study reports the direct dehydrogenative C-H cleaving carbonylative lactamization of 2-arylanilines promoted by visible light and potassium bases. The solvent DMF serves as the sole carbonyl source without the need for an oxidant. The irreversible release of hydrogen gas leads to the formation of stable phenanthridinone products. This method provides a direct conversion of a wide range of 2-arylanilines into various phenanthridinones, making it useful for the synthesis of bioactive molecules and organic optoelectronic materials.
