Copper-Catalyzed C(sp)–H Bond Hydrazidation

Lei, Jian; Sha, Wanxiu; Xie, Xiao-Lan; Weng, Wenting

doi:10.1021/acs.orglett.2c03876

Cited by 14 publications

(18 citation statements)

References 39 publications

(11 reference statements)

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“…Other proposals based on different transport phenomena are also raised to identify the axion state [21][22][23][24][25][26]. By contrast, optical probe of AFMTI or axion insulator has * wyshan@gzhu.edu.cn rarely been discussed [27][28][29]. Particularly, for few evenlayer MnBi 2 Te 4 , whether AFMTI and trivial phases are distinguishable in optical responses remains elusive.…”

Section: Introductionmentioning

confidence: 99%

Magneto-optical Kerr and Faraday effects in bilayer antiferromagnetic insulators

Zhu

Shan

2023

Chinese Phys. B

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Control and detection of antiferromagnetic topological materials are challenging since the total magnetization vanishes. Here we investigate the magneto-optical Kerr and Faraday effects in bilayer antiferromagnetic insulator MnBi2Te4. We find that by breaking the combined mirror symmetries with either perpendicular electric field or external magnetic moment, Kerr and Faraday effects occur. Under perpendicular electric field, antiferromagnetic topological insulators (AFMTI) show sharp peaks at the interband transition threshold, whereas trivial insulators show small adjacent positive and negative peaks. Gate voltage and Fermi energy can be tuned to reveal the differences between AFMTI and trivial insulators. We find that AFMTI with large antiferromagnetic order can be proposed as a pure magneto-optical rotator due to sizable Kerr (Faraday) angles and vanishing ellipticity. Under external magnetic moment, AFMTI and trivial insulators are significantly different in the magnitude of Kerr and Faraday angles and ellipticity. For the qualitative behaviors, AFMTI shows distinct features of Kerr and Faraday angles when the spin configurations of the system change. These phenomena provide new possibilities to optically detect and manipulate the layered topological antiferromagnets.

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Section: Introductionmentioning

confidence: 99%

Magneto-optical Kerr and Faraday effects in bilayer antiferromagnetic insulators

Zhu

Shan

2023

Chinese Phys. B

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“…As an important branch of energetic compounds, novel fused-ring energetic compounds have received special attention from researchers of energetic materials [1][2][3]. Compared with a single heterocyclic ring, a planar fused ring skeleton possesses higher enthalpy of formation, larger ring tension, and can store more chemical energy, and it also has better thermal stability and sensitivity, which offers considerable potential in the development of novel high energy density materials (HEDMs) [4][5][6][7][8][9][10]. Among them, [5,5] fused ring compounds have attracted much attention due to their advantages of large ring tension, planar configuration, and simple structure [11].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of imidazo[1,2‐d][1,2,4]oxadiazole‐functionalized furazan energetic compounds

Chen,

Dou,

Liu

et al. 2023

Journal of Heterocyclic Chem

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Two novel oxygen‐containing imidazo[1,2‐d][1,2,4]oxadiazole heterocycle compounds 2 and 3 were successfully synthesized by oxidation of the aminofurazan group. Compounds 2 and 3 were fully characterized by Fourier Transform Infrared, multinuclear NMR spectroscopy, elemental analysis, and single‐crystal X‐ray diffraction. Their properties were evaluated by measured density, impact, and friction sensitivities, calculated heat of formation, and detonation performances. Compound 2 has high density (1.87 g cm−3), good detonation velocity and pressure (D:8690 m s−1, P: 33.3 GPa), acceptable sensitivity (IS: 12 J, FS: 144 N), and its overall performance is comparable to RDX. Compound 3 has a better sensitivity (IS: 28 J, FS: 252 N), but the detonation performance is average (D:8008 m s−1, P: 27.4 GPa), which may be caused by its low packing index (70.9%) affecting its density (1.78 g cm−3).

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“…Apart from this, introducing functional groups, such as nitro, nitramino, azido, hydrazine, etc., also bestows energetic performance. 20 Furthermore, the investigation of recent literature reveals that the presence of non-covalent interactions such as van der Waals, coulombic, and hydrogen bonding interactions lowers the sensitivity while the planarity of the energetic backbone grants an increment in the density of the molecule. Traditional energetic materials, such as TNT (2,4,6trinitrotoluene), RDX (1,3,5-trinitro-1,3,5-triazinane), and HMX (1,3,5,7-tetranitro-1,3,5,7-tetrazocane) rely on the oldest design principle for energetic materials: the coexistence of fuel and oxidizer in the same molecule.…”

mentioning

confidence: 99%