研究目的
Investigating the photoisomerization of norbornadiene to quadricyclane using a UV-LEDs based photomicroreactor for mechanistic insights and kinetic studies.
研究成果
The study demonstrated the potential of UV-LEDs as an appealing light source for photochemical transformations, offering advantages such as longer lifetime, lower heat generation, and environmental friendliness over conventional mercury arc lamps. A kinetic model was established, correlating the reaction rate constant with the photon flux, which is beneficial for process optimization and further understanding reaction mechanisms.
研究不足
The study is limited by the relatively low photon flux of commercially available UV-LEDs compared to high-pressure mercury arc lamps, which may restrict their application for some photochemical transformations. Additionally, the photons loss due to the absorption and reflection of the microreactor walls was not fully optimized.
1：Experimental Design and Method Selection:
A UV-LEDs based photomicroreactor was constructed using commercially available components. The photoisomerization of norbornadiene to quadricyclane was selected as the model reaction.
2：Sample Selection and Data Sources:
Norbornadiene and photosensitizers were purchased from Aladdin Co. Inc. Solvents like acetone, p-xylene, and dichloromethane were acquired from Sinopharm Chemical Reagent Co., Ltd.
3：List of Experimental Equipment and Materials:
The setup included a syringe pump (NE-1200, New Era Pump System, Inc.), a UV-LEDs strip (Aokai Ruisi, Inc.), an air blower (Minfeng, Inc.), and a PFA capillary microreactor.
4：Experimental Procedures and Operational Workflow:
The reaction mixture was delivered into the capillary microreactor by a syringe pump, irradiated by UV-LEDs, and cooled by an air blower. The product was analyzed by GC-FID and 1H NMR.
5：Data Analysis Methods:
The photon flux was quantified by chemical actinometry, and the reaction kinetics were analyzed using a proposed kinetic model.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
