Accelerated Two-Phase Oxidation in Microdroplets Assisted by Light and Heat without the Use of Phase-Transfer Catalysts
Accelerated Two-Phase Oxidation in Microdroplets Assisted by Light and Heat without the Use of Phase-Transfer Catalysts
复制标题
不使用相转移催化剂的光和热辅助下微滴中的加速两相氧化
DOI：
10.1021/acssuschemeng.8b01430
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发表时间：
2018-05
影响因子：
8.4
通讯作者：
Jinhua Liu
中科院分区：
文献类型：
--
作者：
Wenwen Zhang;Heyong Cheng;Jinhua Liu
在无相转移催化剂的条件下，可以实现微液滴中醇的两相氧化。在这里，我们实现了反应加速两相氧化微滴使用稀释的氧化剂在光和热照射下。短波长的光比长波长的光更有利于反应的加速。然而，产率显着提高，通过适度加热，但由于结晶过量的热量降低。在光和热照射下用5倍稀释的NaOCl溶液的产率与在没有光和热的情况下用未稀释的NaOCl的产率相当。NaOCl的稀释不仅提高了喷雾器的耐用性（毛细管尖端没有盐沉积），而且满足了绿色化学的要求。
Two-phase oxidation of alcohols to corresponding aldehydes could be achieved without any phase-transfer catalyst in microdroplets. Herein, we realized reaction acceleration for two-phase oxidation in microdroplets using diluted oxidants under light and thermal irradiation. Lights of short wavelengths were more desirable to reaction acceleration than lights of long wavelengths. However, yields were dramatically improved by moderate heating but reversely decreased by excess heat owing to crystallization. The yields with 5-fold diluted NaOCl solution under light and thermal irradiation were comparable to those with undiluted NaOCl in the absence of light and heat. The dilution of NaOCl not only improved robustness of the sprayer (no salt deposition at the capillary tip) but also met the requirements of green chemistry.