An effective transition-metal-free catalytic system is developed for aerobic oxidations of alcohols. Using catalytic amount of bromide-bromate coupling, H2SO4, and NaNO2, together with 2,2,6,6-tetramethylpiperidine N-...An effective transition-metal-free catalytic system is developed for aerobic oxidations of alcohols. Using catalytic amount of bromide-bromate coupling, H2SO4, and NaNO2, together with 2,2,6,6-tetramethylpiperidine N-oxyl radical （TEMPO） in the presence of air, various alcohols could be converted into the corresponding aldehydes or ketones in good to excellent isolated yields under mild conditions.展开更多
Redox flow batteries(RFBs)are promising candidates to establish a grid-scale energy storage system for intermittent energy sources.While the current technology of vanadium RFBs has been widely exploited across the wor...Redox flow batteries(RFBs)are promising candidates to establish a grid-scale energy storage system for intermittent energy sources.While the current technology of vanadium RFBs has been widely exploited across the world,the rise in the price of vanadium and its limited volumetric energy density have necessitated the development of new kinds of redox active molecules.Organic molecules can be used as new and economical redox couples in RFBs to address these issues.In addition,the redox organic species also provide ample advantages to increase the voltage and solubility,provide multiple numbers of electron transfer,and ensure electrochemical/chemical stability by molecular engineering through simple synthetic methods.This review focuses on the recent developments in aqueous organic RFBs,including the molecular design and the corresponding cycling performance as these organic redox molecules are employed as either the negolyte or posolyte.Various strategies for tuning the electrochemical/chemical characteristics of organic molecules have improved their solubility,redox potential cycling stability,and crossover issue across a separating membrane.We also put forward new strategies using nanotechnology and our perspective for the future development of this rapidly growing field.展开更多
基金Project supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB0610000)the National Key R&D Program of China(No.2021YFA1500100)+2 种基金the National Natural Science Foundation of China(Nos.21821002,91956112,22101294)the Science and Technology Commission of Shanghai Municipality of Shanghai(Nos.21ZR1476500,20XD1425100)the Natural Science Foundation of Ningbo(No.2023J035)。
基金grants from National Natural Science Foundation of China，Program for Changjiang Scholars and Innovative Research Team in University
文摘An effective transition-metal-free catalytic system is developed for aerobic oxidations of alcohols. Using catalytic amount of bromide-bromate coupling, H2SO4, and NaNO2, together with 2,2,6,6-tetramethylpiperidine N-oxyl radical （TEMPO） in the presence of air, various alcohols could be converted into the corresponding aldehydes or ketones in good to excellent isolated yields under mild conditions.
文摘Redox flow batteries(RFBs)are promising candidates to establish a grid-scale energy storage system for intermittent energy sources.While the current technology of vanadium RFBs has been widely exploited across the world,the rise in the price of vanadium and its limited volumetric energy density have necessitated the development of new kinds of redox active molecules.Organic molecules can be used as new and economical redox couples in RFBs to address these issues.In addition,the redox organic species also provide ample advantages to increase the voltage and solubility,provide multiple numbers of electron transfer,and ensure electrochemical/chemical stability by molecular engineering through simple synthetic methods.This review focuses on the recent developments in aqueous organic RFBs,including the molecular design and the corresponding cycling performance as these organic redox molecules are employed as either the negolyte or posolyte.Various strategies for tuning the electrochemical/chemical characteristics of organic molecules have improved their solubility,redox potential cycling stability,and crossover issue across a separating membrane.We also put forward new strategies using nanotechnology and our perspective for the future development of this rapidly growing field.
