用添加的碳点作为高选择性脱原氧化的高效光催化剂
Kai-Kai Niu1, Rong-Zhen Zhang1, Xuan-Zong Yang1
1School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, Shandong 255000, P. R. China.
ChemSusChem
|December 22, 2023
概括
添加碳点 (N-CDs) 通过产生活性氧物种,有效催化有机反应. 这一进步为在光催化中利用成本效益高的碳点提供了一种新的方法.
科学领域:
- 材料科学 材料科学 材料科学
- 光催化作用的光催化
- 有机化学 有机化学
背景情况:
- 碳点 (CD) 是零维,<10nm发光材料,具有sp2/sp3碳核和表面功能组.
- CD显示强烈的光发光和UV-Vis吸收,使它们适合光催化.
- 作为直接光催化有机反应的光敏剂的非金属合CD报告很少.
研究的目的:
- 开发化碳点 (N-CDs) 作为有机反应的有效光敏感剂.
- 研究N-CDs在产生活性氧物种 (ROS) 的能力.
- 为了证明N-CDs在 styrene的脱氧基化中的应用.
主要方法:
- 添加碳点 (N-CDs) 的合成.
- 用于ROS生成的N-CDs的表征 (超氧化离子基和单片氧).
- 在聚乙烯的光催化脱原氧基化中应用N-CDs.
主要成果:
- N-CDs有效地产生反应性氧物种 (ROS),包括O2•−和1O2.2.
- 实现了93%的前所未有的高收益率,用于 styrene 的脱基氧化.
- 证明了N-CDs作为有机转换的有效光催化剂的潜力.
结论:
- N-CDs是能够产生ROS和驱动有机反应的光敏化剂.
- 这项研究提出了N-CDs在光催化中的新应用,具有高效率.
- 具有成本效益和可访问的CD为推进光催化提供了一个有希望的途径.
相关概念视频
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
10.2K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
10.2K
Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation
18.1K
Introduction
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.
18.1K
Carboxylic Acids to Methylesters: Alkylation using Diazomethane
2.2K
Carboxylic acids react with diazomethane in an ether solvent via alkylation at the carboxylate oxygen atom to give methyl esters of the corresponding acid with excellent yields.
2.2K
Preparation of Alkynes: Dehydrohalogenation
15.8K
Introduction
Alkynes can be prepared by dehydrohalogenation of vicinal or geminal dihalides in the presence of a strong base like sodium amide in liquid ammonia. The reaction proceeds with the loss of two equivalents of hydrogen halide (HX) via two successive E2 elimination reactions.
Alkynes can be prepared by dehydrohalogenation of vicinal or geminal dihalides in the presence of a strong base like sodium amide in liquid ammonia. The reaction proceeds with the loss of two equivalents of hydrogen halide (HX) via two successive E2 elimination reactions.
15.8K
Reduction of Alkenes: Catalytic Hydrogenation
12.0K
Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
12.0K
Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate
11.6K
Alkenes can be dihydroxylated using potassium permanganate. The method encompasses the reaction of an alkene with a cold, dilute solution of potassium permanganate under basic conditions to form a cis-diol along with a brown precipitate of manganese dioxide.
11.6K


