AlCl3-catalyzed C-H p hosphination of benzene: A mechanistic study

Duan, Haodong; Xu, Xiaoling; Leng, Kangwei; Guo, Ge; Yu, Qing; Li, Xinjin; Han, Yuxi; Gao, Jun; Wang, Zhongwei

doi:10.1016/j.apcata.2020.117943

Cited by 6 publications

(1 citation statement)

References 20 publications

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“…The alkylbenzene is created due to the σ complex is unstable and easily dehydrogenated to generate aromatic products, it is easier to alkylate than benzene and can also obtain polyalkyl-substituted aromatic hydrocarbons. As an example, the benzene ring's reaction mechanism catalyzed by AlCl3 is shown in Scheme 3 [52][53][54]. Notes: "d 002 ", the interlayer spacing; "L c ", aromatic layer thickness; "f 002 ", aromaticity.…”

Section: Catalytic Mechanismmentioning

confidence: 99%

Research on Coal Tar Pitch Catalytic Oxidation and Its Effect on the Emission of PAHs during Co-Carbonation with Coal

Chen

Guo

et al. 2021

Catalysts

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Coal tar pitch (CTP) is abundant and widely used, but its properties will be affected due to oxidation aging during storage. In this study, CTP was oxidized by simulating the air oxidation process, and the change of chemical structure has been analyzed by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and both gas chromatography and mass spectrometry (GCMS). The effects of the oxidized and unoxidized CTP co-carbonization with coal on the polycyclic aromatic hydrocarbons (PAHs) emission were detected by GCMS. The small and medium-molecule aromatic substances were reduced during CTP oxidation, while the intermolecular condensation reaction increased the macromolecules content. The catalytic can effectively facilitate the dehydrogenation and condensation reaction of CTP and the entry of oxygen molecules, which leads to the increase of oxygen-containing groups and the decrease of PAHs. Compared to the raw CTP, the catalytic oxidized CTP significantly reduced the emissions of toxic PAHs during the co-carbonization with coal. A possible catalytic mechanism of CTP catalytic oxidation is proposed.

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Section: Catalytic Mechanismmentioning

confidence: 99%

Research on Coal Tar Pitch Catalytic Oxidation and Its Effect on the Emission of PAHs during Co-Carbonation with Coal

Chen

Guo

et al. 2021

Catalysts

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A (4‐fluorophenyl)(phenyl)phosphine oxide‐modified epoxy resin with improved flame‐retardancy, hydrophobicity, and dielectric properties

Duan

Leng

et al. 2021

J of Applied Polymer Sci

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The compound (4‐fluorophenyl)(phenyl) phosphine oxide (4‐FPO) was designed, synthesized, and used in the modification of epoxy resin (EP). The 4‐FPO‐modified EP was prepared by curing the reaction mixture of diglycidyl ether of bisphenol A (DGEBA) and 4‐FPO in the presence of 4,4′‐diaminodiphenylsulfone (DDS). Compared with the unmodified EP, the limiting oxygen index value of the EP/4‐FPO‐0.6 (4‐FPO‐modified EP with 0.6 wt% of phosphorus) increased to 31.6%, and the sample achieved UL‐94 V‐0 rating. The peak of the heat release rate, average of the heat release rate, and total heat release of EP/4‐FPO‐0.6 were reduced by 39, 24, and 19%, respectively. Mechanism study showed that the quenching effect in the gas and barrier effect in the condensed phase were responsible for the enhanced flame‐retardant properties of the 4‐FPO‐modified EP. The results showed that hydrophobicity and dielectric properties of the modified EP were clearly improved.

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Benzyl(4-fluorophenyl)phenylphosphine oxide-modified epoxy resin with improved flame retardancy and dielectric properties

Duan

Zhuang

Mei

et al. 2022

Adv Compos Hybrid Mater

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AlCl3-catalyzed C-H p hosphination of benzene: A mechanistic study

Cited by 6 publications

References 20 publications

Research on Coal Tar Pitch Catalytic Oxidation and Its Effect on the Emission of PAHs during Co-Carbonation with Coal

Research on Coal Tar Pitch Catalytic Oxidation and Its Effect on the Emission of PAHs during Co-Carbonation with Coal

A (4‐fluorophenyl)(phenyl)phosphine oxide‐modified epoxy resin with improved flame‐retardancy, hydrophobicity, and dielectric properties

Benzyl(4-fluorophenyl)phenylphosphine oxide-modified epoxy resin with improved flame retardancy and dielectric properties

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