67368-72-3Relevant academic research and scientific papers
Photochemical generation of manganese(IV)-oxo porphyrins by visible light photolysis of dimanganese(III) μ-oxo bis-porphyrins
Kwong, Ka Wai,Winchester, Charles M.,Zhang, Rui
, p. 202 - 206 (2016)
Visible light photolysis of dimanganese(III) μ-oxo bis-porphyrins, [MnIII(Por)]2O, was studied in three porphyrin systems with different electronic structures. Direct conversion of manganese (III) μ-oxo dimers to manganese(IV)-oxo porphyrins plus manganese(III) products has been observed in benzene solution upon light irradiation. The spectral signature of MnIV(Por)(O) was further confirmed by production of the same species in the known experiment of the MnIII(Por)Cl with PhI(OAc)2. Continuous irradiation of dimanganese(III) μ-oxo bis-porphyrins in the presence of pyridine or triphenylphosphine gave rise to the formation of MnII(Por)(Py) or MnII(Por)(PPh3) which were stable to be detected. A photo-disproportionation mechanism similar to that for diiron(III) μ-oxo bis-porphyrins was proposed to explain above photochemical behaviors of the three dimanganese(III) μ-oxo bis-porphyrins.
A preparing method of p-nitroacetophenone
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, (2019/01/07)
A preparing method of p-nitroacetophenone is disclosed. The method includes reacting p-nitroethylbenzene, as a raw material, in an autoclave at 110-150 DGE C for 3-7 h under the function of a metalloporphyrin catalyst shown as a formula 1 or a formula 2 in an oxygen atmosphere having a pressure of 0.8-2 MPa under a condition of no solvent; and subjecting an obtained reaction liquid mixture to after-treatment to obtain the target product that is p-nitroacetophenone. The method includes reaction in the sealed autoclave, thus greatly reducing volatilization loss of the raw material, and avoidingemission of reaction waste gas so as to avoid environment pollution therefrom. The bionic metalloporphyrin catalyst which is naturally degradable is adopted as an auxiliary catalyst, is low in dosage,and can increase product selectivity. Consumption of an organic solvent and purification of the target product are avoided, thus reducing the cost.
