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学者姓名:李远明
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Abstract :
We present an approach for ortho C(sp2)-H acylation and intramolecular amination reactions, employing 4amino-benzotriazole (ABTA) as a bidentate directing group. This method is facilitated by a palladium catalyst in combination with iodobenzene diacetate. Our approach efficiently yields acetoxylation and intramolecular amination products from a variety of acylamide substrates, including arylcarboxamides and arylacetamides.
Keyword :
4-Amino-benzotriazole 4-Amino-benzotriazole Acetoxylation Acetoxylation C-H activation C-H activation Intramolecular amination Intramolecular amination
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GB/T 7714 | Wang, Zhuo , Li, Chengqian , Fan, Yupeng et al. 4-Aminobenzotriazole directed palladium-catalyzed C-H acetoxylation and intramolecular amination reaction [J]. | TETRAHEDRON , 2025 , 173 . |
MLA | Wang, Zhuo et al. "4-Aminobenzotriazole directed palladium-catalyzed C-H acetoxylation and intramolecular amination reaction" . | TETRAHEDRON 173 (2025) . |
APA | Wang, Zhuo , Li, Chengqian , Fan, Yupeng , Hu, Jianliang , Huang, Wangsheng , Li, Yuanming et al. 4-Aminobenzotriazole directed palladium-catalyzed C-H acetoxylation and intramolecular amination reaction . | TETRAHEDRON , 2025 , 173 . |
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Employing spirophenanthrenes and phenanthrenone as template arenes for annulative pi-extension (APEX), we synthesized a series of spiro-fused dibenzo[g,p]chrysenes (DBCs) in high yields. Experimental and theoretical investigations highlight the distinct advantages of spiro-DBCs, including characteristic fluorescence properties (412 nm) and enhanced thermal stability. This study provides insights into the electronic structure and potential applications of spiro-DBCs in organic functional materials.
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GB/T 7714 | Song, Kanghui , Zhang, Yuying , Wu, Shuai et al. Spiro-fused dibenzo[g,p]chrysene: annulative π-extension (APEX) synthesis and properties [J]. | ORGANIC CHEMISTRY FRONTIERS , 2025 , 12 (7) : 2225-2231 . |
MLA | Song, Kanghui et al. "Spiro-fused dibenzo[g,p]chrysene: annulative π-extension (APEX) synthesis and properties" . | ORGANIC CHEMISTRY FRONTIERS 12 . 7 (2025) : 2225-2231 . |
APA | Song, Kanghui , Zhang, Yuying , Wu, Shuai , Yang, Sha , Wei, Shengchen , Chen, Songhua et al. Spiro-fused dibenzo[g,p]chrysene: annulative π-extension (APEX) synthesis and properties . | ORGANIC CHEMISTRY FRONTIERS , 2025 , 12 (7) , 2225-2231 . |
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Efficient synthetic methods are urgently needed to produce graphene nanoribbons (GNRs) with diverse structures and functions. Precise control over the topological edges of GNRs is also crucial for achieving diverse molecular topologies and desirable electro-optical properties. This study demonstrates a highly efficient "shotgun" synthesis of thiophene-backbone arcuate GNRs, offering a significant advantage over tedious iterative synthesis. This method utilizes a one-pot, three component Suzuki-Miyaura coupling for the precursor, followed by a Scholl reaction for cyclization. The resulting arcuate GNRs have sulfur atoms embedded in the carbon backbone with a combined armchair, cove, and fjord edge structure. This multi-edge architecture is further modified by high-yield oxidation of the electron-rich sulfur atoms to electron-deficient sulfones, enabling precise regulation of the GNRs' electronic properties. These arcuate GNRs with diverse edge structures, heteroatom doping and precise lengths open exciting avenues for their application in optoelectronic devices.
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GB/T 7714 | Zhang, Ruiying , Chen, Xinyu , Zhu, Lingyun et al. Thiophene-backbone arcuate graphene nanoribbons: shotgun synthesis and length dependent properties [J]. | CHEMICAL SCIENCE , 2025 , 16 (17) : 7366-7373 . |
MLA | Zhang, Ruiying et al. "Thiophene-backbone arcuate graphene nanoribbons: shotgun synthesis and length dependent properties" . | CHEMICAL SCIENCE 16 . 17 (2025) : 7366-7373 . |
APA | Zhang, Ruiying , Chen, Xinyu , Zhu, Lingyun , Huang, Yanxia , Zhai, Zi'ang , Wang, Qiang et al. Thiophene-backbone arcuate graphene nanoribbons: shotgun synthesis and length dependent properties . | CHEMICAL SCIENCE , 2025 , 16 (17) , 7366-7373 . |
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Polycyclic aromatic hydrocarbons (PAHs) have attracted significant interest in material chemistry, particularly if they own extremely low band gaps and magnetic properties. However, challenges remain regarding the synthetic accessibility and energy saturation issues. In this study, we introduce NR-11, which consists of eleven aromatic rings in its main conjugation and is separately doped with two electron-rich nitrogen atoms. This unique structure imparts intriguing oxidation characteristics to NR-11. The cationic radical NR-11+⋅ exhibits enhanced stability and demonstrates strong absorption in the range of 1250 nm to 3000 nm, peaking at 2570 nm. As a result, the optical energy gap of NR-11+⋅ is one of the lowest reported to date. Additionally, X-ray crystal structure analysis reveals that NR-11+⋅ displays unusual symmetry-broken charge separation. For the dication, variable-temperature NMR and variable-temperature EPR studies indicate that NR-112+ exhibits a high diradical character with a ▵ES-T of approximately −1 kcal/mol. Additionally, its spins are polarized at two ends of the PAH. Meanwhile, its strong absorption in the near-infrared II region suggests promise in photoacoustic (PA) conversion applications. This work underscores the significance of cationic species of extended long PAHs, highlighting their exceptional properties and potential applications. © 2025 Wiley-VCH GmbH.
Keyword :
Alkylation Alkylation Aromatization Aromatization Charge transfer Charge transfer Crystal atomic structure Crystal atomic structure Crystal symmetry Crystal symmetry Electron spin resonance spectroscopy Electron spin resonance spectroscopy Polycyclic aromatic hydrocarbons Polycyclic aromatic hydrocarbons
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GB/T 7714 | Huang, Yanxia , Zhou, Laiyun , Zhang, Ruiying et al. Cationic Magnetically Active Nitrogen-Doped Polycyclic Aromatic Hydrocarbon with Record Low Band Gap [J]. | Angewandte Chemie - International Edition , 2025 , 64 (13) . |
MLA | Huang, Yanxia et al. "Cationic Magnetically Active Nitrogen-Doped Polycyclic Aromatic Hydrocarbon with Record Low Band Gap" . | Angewandte Chemie - International Edition 64 . 13 (2025) . |
APA | Huang, Yanxia , Zhou, Laiyun , Zhang, Ruiying , Ding, Yeda , Shi, Dan , Zhu, Lingyun et al. Cationic Magnetically Active Nitrogen-Doped Polycyclic Aromatic Hydrocarbon with Record Low Band Gap . | Angewandte Chemie - International Edition , 2025 , 64 (13) . |
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Polyferrocene macrocycles hold immense potential in the fields of molecular electronics and electrochemistry, primarily due to their multiple metal centers. However, developing highly efficient synthetic strategies for constructing these rings remains a significant challenge. In this study, we successfully synthesized triferrocenyl macrocycles using Pt-mediated coupling strategy and determined their configuration using single-crystal X-ray diffraction analysis, revealing a structure reminiscent of the Penrose Stair. We comprehensively investigated the macrocycle's structure, photophysical properties, and employed density functional theory (DFT) calculations to gain further insights. Notably, this macrocycle exhibits several advantageous features, including a flexible structure, good solubility, and a highly efficient synthetic pathway.
Keyword :
Conjugated macrocycle Conjugated macrocycle Organometallic macrocycle Organometallic macrocycle Pt-template method Pt-template method
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GB/T 7714 | Xu, Jindong , Lan, Bin , Zhu, Lingyun et al. Synthesis and Properties of Ferrocene Conjugated Macrocycles with Illusory Topology of the Penrose Stairs [J]. | CHEMICAL RESEARCH IN CHINESE UNIVERSITIES , 2024 , 40 (5) : 881-886 . |
MLA | Xu, Jindong et al. "Synthesis and Properties of Ferrocene Conjugated Macrocycles with Illusory Topology of the Penrose Stairs" . | CHEMICAL RESEARCH IN CHINESE UNIVERSITIES 40 . 5 (2024) : 881-886 . |
APA | Xu, Jindong , Lan, Bin , Zhu, Lingyun , Xu, Hui , Chen, Xinyu , Li, Wenjuan et al. Synthesis and Properties of Ferrocene Conjugated Macrocycles with Illusory Topology of the Penrose Stairs . | CHEMICAL RESEARCH IN CHINESE UNIVERSITIES , 2024 , 40 (5) , 881-886 . |
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Two o -carborane based tetraphenylethene (TPE) cationic cyclophanes O1 4PF6 and O2 4PF6 were synthesized through an SN 2 reaction. Their structures were confirmed both possessing Z-shaped cavities in single crystal analysis. The optical properties of these macrocycles were systematically investigated using UV-vis spectroscopy and fluorescence techniques. It is worth noting that the introduction of a methoxy group to the TPE unit enables the synthesis of a near-infrared-emitting macrocycle O2 4PF6 . The recognition behaviors of these two macrocycles towards nucleotides were investigated using various techniques including fluorescence titration, UV-vis titration, and transmission electron microscopy (TEM). Interestingly, these cyclophanes exhibited aggregation-induced emission (AIE) effects in water or under the induction of nucleotides. (c) 2024 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.
Keyword :
AIE effect AIE effect Cationic cyclophanes Cationic cyclophanes Nucleotides Nucleotides o -Carborane o -Carborane Tetraphenylethene Tetraphenylethene
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GB/T 7714 | Chen, Rongjian , Liu, Jiahui , Lin, Caixia et al. Synthesis and properties of tetraphenylethene cationic cyclophanes based on o -carborane skeleton [J]. | CHINESE CHEMICAL LETTERS , 2024 , 35 (12) . |
MLA | Chen, Rongjian et al. "Synthesis and properties of tetraphenylethene cationic cyclophanes based on o -carborane skeleton" . | CHINESE CHEMICAL LETTERS 35 . 12 (2024) . |
APA | Chen, Rongjian , Liu, Jiahui , Lin, Caixia , Li, Yuanming , Geng, Yanhou , Yuan, Yaofeng . Synthesis and properties of tetraphenylethene cationic cyclophanes based on o -carborane skeleton . | CHINESE CHEMICAL LETTERS , 2024 , 35 (12) . |
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A class of side-chain type ferrocene macrocycles with a radially conjugated system is introduced in this study. The stereo configurations of these ferrocene rings were determined through single-crystal X-ray diffraction analysis. Notably, in the solid state, the ferrocene rings exhibit a distinctive herringbone stacking pattern imposed by a ferrocene-to-ring host-guest interaction. Through UV-vis absorption spectroscopy, electrochemical measurements, and theoretical calculations, valuable insights into the electronic properties of these rings were obtained. In addition, the single crystal of macrocycle A2B demonstrates a second-order nonlinear optical response. As a class of organometallic nanorings, this work holds great potential for further exploration in the fields of organometallic chemistry, molecular electronics, and host-guest chemistry. © 2024 The Authors. Co-published by University of Science and Technology of China and American Chemical Society.
Keyword :
Conjugated Macrocycles Conjugated Macrocycles Ferrocene Ferrocene Nanoring Nanoring Organometallic Macrocycles Organometallic Macrocycles Second-Order Nonlinear Optical Second-Order Nonlinear Optical
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GB/T 7714 | Lan, B. , Xu, J. , Zhu, L. et al. Side-Chain Type Ferrocene Macrocycles [J]. | Precision Chemistry , 2024 , 2 (4) : 143-150 . |
MLA | Lan, B. et al. "Side-Chain Type Ferrocene Macrocycles" . | Precision Chemistry 2 . 4 (2024) : 143-150 . |
APA | Lan, B. , Xu, J. , Zhu, L. , Chen, X. , Kono, H. , Wang, P. et al. Side-Chain Type Ferrocene Macrocycles . | Precision Chemistry , 2024 , 2 (4) , 143-150 . |
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研究生教育是高等教育的最高层次,是衡量一个国家高等教育竞争力的关键标志,是拔尖创新人才自主培养的主渠道。为了提高人才培养质量,在“以学生为中心,注重科学思维培养,注重科研能力培养以及注重国际视野培养”的教学思想指导下,针对有机结构分析课程教学过程中存在的难点问题,从“教学理念的国际化、教学内容的国际化、教学团队的国际化、教学方法的国际化”等方面进行创新教学实践,取得了一系列成果,有效地提升了学生的科研水平,对于创新型人才的培养起到了积极的推动作用。
Keyword :
国际化视野 国际化视野 学生为中心 学生为中心 有机结构分析 有机结构分析 研究生教学 研究生教学
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GB/T 7714 | 袁耀锋 , 叶克印 , 徐春发 et al. 在研究生课程的教学中注重国际视野的培养——以“有机结构分析”课程为例 [J]. | 大学化学 , 2024 , 39 (06) : 145-150 . |
MLA | 袁耀锋 et al. "在研究生课程的教学中注重国际视野的培养——以“有机结构分析”课程为例" . | 大学化学 39 . 06 (2024) : 145-150 . |
APA | 袁耀锋 , 叶克印 , 徐春发 , 晏宏 , 李远明 . 在研究生课程的教学中注重国际视野的培养——以“有机结构分析”课程为例 . | 大学化学 , 2024 , 39 (06) , 145-150 . |
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研究生教育是高等教育的最高层次,是衡量一个国家高等教育竞争力的关键标志,是拔尖创新人才自主培养的主渠道.为了提高人才培养质量,在"以学生为中心,注重科学思维培养,注重科研能力培养以及注重国际视野培养"的教学思想指导下,针对有机结构分析课程教学过程中存在的难点问题,从"教学理念的国际化、教学内容的国际化、教学团队的国际化、教学方法的国际化"等方面进行创新教学实践,取得了一系列成果,有效地提升了学生的科研水平,对于创新型人才的培养起到了积极的推动作用.
Keyword :
国际化视野 国际化视野 学生为中心 学生为中心 有机结构分析 有机结构分析 研究生教学 研究生教学
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GB/T 7714 | 袁耀锋 , 叶克印 , 徐春发 et al. 在研究生课程的教学中注重国际视野的培养 [J]. | 大学化学 , 2024 , 39 (6) : 145-150 . |
MLA | 袁耀锋 et al. "在研究生课程的教学中注重国际视野的培养" . | 大学化学 39 . 6 (2024) : 145-150 . |
APA | 袁耀锋 , 叶克印 , 徐春发 , 晏宏 , 李远明 . 在研究生课程的教学中注重国际视野的培养 . | 大学化学 , 2024 , 39 (6) , 145-150 . |
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An electrochemical intramolecular 5-exo-dig aza-cyclization of 2-alkynylbenzamides and subsequent nucleophilic fluorination have been developed to afford the highly selective synthesis of mono- and trifluorinated isoindolin-1-one derivatives. This work demonstrates the unique capability of synthetic electrochemistry in controlling reaction selectivity through the applied electrolytic parameters. In addition, the obtained monofluorinated 3-methyleneisoindolin-1-one (19) displays interesting photophysical properties that are not observed in its nonfluorinated analog.
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GB/T 7714 | Ding, Cheng-Lin , Xu, Qiaohong , Wu, Shuai et al. Current-Controlled Electrochemical Approach Toward Mono- and Trifluorinated Isoindolin-1-one Derivatives [J]. | ORGANIC LETTERS , 2024 , 26 (8) : 1645-1651 . |
MLA | Ding, Cheng-Lin et al. "Current-Controlled Electrochemical Approach Toward Mono- and Trifluorinated Isoindolin-1-one Derivatives" . | ORGANIC LETTERS 26 . 8 (2024) : 1645-1651 . |
APA | Ding, Cheng-Lin , Xu, Qiaohong , Wu, Shuai , Zhong, Yi , He, Xinglei , Lin, Yuqi et al. Current-Controlled Electrochemical Approach Toward Mono- and Trifluorinated Isoindolin-1-one Derivatives . | ORGANIC LETTERS , 2024 , 26 (8) , 1645-1651 . |
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