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Catalytic oxidation application of a kind of sulfaquinoxaline cobalt compound
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A technology of sulfaquinoxaline cobalt and catalytic oxidation, applied in the field of material chemistry, can solve the problems of poor stability, high cost, low yield of Schiff base synthesis, etc.
Active Publication Date: 2020-10-30
宁波市大学科技园发展有限公司
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Problems solved by technology
The problem that the above-mentioned Schiff basemetal complexes exist as catalysts is that some Schiff base synthesis yields are not high, the stability is not good or the cost is high, etc.
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Embodiment 1
[0018] Weigh CoSO 4 ·6H 2 A mixed solvent of O (0.263g, 1.0mmol), sulfaquinoxaline (0.600g, 2.0mmol), 2,2'-bipyridine (0.156g, 1.0mmol) plus 4.0mL distilled water, 8mL ethanol and 2.0mL DMF , then microwave heating and stirring, reflux for 15 minutes, then cool to room temperature, let stand, slowly evaporate the solvent for 2 days, and precipitate red blocky crystals.
Embodiment 2
[0020] Weigh [Co(NO 3 ) 2 ]·6H 2 A mixed solvent of O (0.291g, 1.0mmol), sulfaquinoxaline (0.600g, 2.0mmol), 2,2'-bipyridine (0.156g, 1.0mmol) plus 6.0mL of distilled water, 12mL of ethanol and 3.0mL of DMF Then heated and stirred by microwave, refluxed for 30 minutes, cooled to room temperature, left to stand, slowly evaporated the solvent for 3 days, and precipitated red blocky crystals.
Embodiment 3
[0022] Weigh Co(Ac) 2 4H 2 A mixed solvent of O (0.249g, 1.0mmol), sulfaquinoxaline (0.600g, 2.0mmol), 2,2'-bipyridine (0.156g, 1.0mmol) plus 8.0mL of distilled water, 16mL of ethanol and 4.0mL of DMF , then microwave heating and stirring, reflux reaction for 20min, then cool to room temperature, let stand, and slowly evaporate the solvent for 4 days, and precipitate red blocky crystals.
[0023] The red blocky crystal that makes in the above-mentioned embodiment carries out X-raysingle crystaldiffractometer analysis test, determines that its molecular formula is C 38 h 32 N 10 o 5 S 2 Co, crystalsystem is monoclinic, space group is P2(1) / c, unit cell parameters α=90°, β=100.848°, γ=90°, that is, the coordination compound of cobalt, and its structural unit is shown in Figure 1.
[0024] Using the cobalt compound prepared in the above example as a catalyst for catalytic oxidation of benzoin, in a mixed solvent of ethanol and water with a volume ratio of 1:2, reacte...
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Abstract
The invention discloses catalytic oxidation application of sulfaquinoxalinecobalt compound. The compound is characterized by being cobalt compound with catalytic oxidation activity on benzoin; a molecular formula of the cobalt compound is C38H32N10O5S2Co, a crystalsystem is monoclinic, a space group is P2(1) / c, cell parameters are shown in a following image, the alpha is equal to 90 degrees, thebeta is equal to 100.848 degrees, and the gamma is equal to 90 degrees. The compound is prepared from cobalt salt, sulfaquinoxaline and 2,2'-dipyridyl and by mixed reaction according to a certain proportion and has the advantages of defined spatial structure, accurate molecular formula and simple synthesizing steps. The prepared cobalt compound disclosed by the invention shows good catalytic oxidation activity on benzoin and has a wide application prospect of serving as a potential catalytic active material.
Description
technical field [0001] The invention belongs to the field of material chemistry, and in particular relates to a catalytic oxidation application of a sulfaquinoxaline cobalt compound. Background technique [0002] Catalytic oxidation reaction is one of the most important reactions in chemical industry and medicine field. Most of the oxidants used in early catalytic oxidation reactions were various inorganic compound oxidants, such as potassiumpermanganate, potassium dichromate, etc. These oxidants seriously polluted the environment. As environmental issues are getting more and more attention, environmentally friendly green oxidants (such as oxygen, hydrogenperoxide, ozone, etc.) are favored by people and have become a research hotspot in oxidation reactions. However, this kind of oxidizing agent has disadvantages such as weak oxidizing ability, uncertain oxidizing performance, and complex reaction conditions. Studies have found that under the action of some coordination c...
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