Borondipyrromethenes(BODIPY) are a class of fluorescent dyes whose fluorescence quantum yields are generally high and independent of the solvent.In this paper,we report the synthesis of a new type of BODIPY compound t...Borondipyrromethenes(BODIPY) are a class of fluorescent dyes whose fluorescence quantum yields are generally high and independent of the solvent.In this paper,we report the synthesis of a new type of BODIPY compound that carries an azido group on the 3-position of the pyrrole core.The azido group quenches the fluorescence of the dye due to its weak electron-donating effect.The fluorescence of the BODIPY dye can be switched on after reacting with alkynes via a Cu(Ⅰ) catalyzed azide-alkyne cycloaddition(CuAAC) reaction.We further demonstrate that this azido-BODIPY compound can be used in the cell imaging applications.展开更多
An efficient and practical method is developed for the trifluoromethylation of enamides using Umemoto's reagent as the trifluoromethylating reagent. These reactions proceeded under visible light irradiation withou...An efficient and practical method is developed for the trifluoromethylation of enamides using Umemoto's reagent as the trifluoromethylating reagent. These reactions proceeded under visible light irradiation without any photocatalyst at room temperature in good chemical yields.展开更多
Bright tunable light emission in the short wavelength range from sulfur nanodots was demonstrated with a photoluminescence quantum yield(PLQY)of up to 59.4%.A fission-aggregation mechanism was proposed for the formati...Bright tunable light emission in the short wavelength range from sulfur nanodots was demonstrated with a photoluminescence quantum yield(PLQY)of up to 59.4%.A fission-aggregation mechanism was proposed for the formation of sulfur nanodots with desired performances.This synthetic strategy allowed for simultaneous size control from 3.2 to 5.6 nm,thus tuning the emission color from ultraviolet(UV)to deep blue(342±430 nm),and for the suppression of unwanted nonradiative recombination centers and deep level emission.The luminescence mechanism and quantum confinement effect of the synthesized sulfur nanodots were investigated by optical spectroscopy and theoretical calculations.These results show promise toward the application of sulfur nanodots in UV optoelectronics,biomedical treatments,and sterilization.展开更多
基金supported by the Alfred P. Sloan Scholarship, Camille Dreyfus Teacher Scholar Award,the W.M.Keck Foundation,and the Colon Cancer Center of University of South Carolinasupport from the National Natural Science Foundation of China(91013006)
文摘Borondipyrromethenes(BODIPY) are a class of fluorescent dyes whose fluorescence quantum yields are generally high and independent of the solvent.In this paper,we report the synthesis of a new type of BODIPY compound that carries an azido group on the 3-position of the pyrrole core.The azido group quenches the fluorescence of the dye due to its weak electron-donating effect.The fluorescence of the BODIPY dye can be switched on after reacting with alkynes via a Cu(Ⅰ) catalyzed azide-alkyne cycloaddition(CuAAC) reaction.We further demonstrate that this azido-BODIPY compound can be used in the cell imaging applications.
基金supported by the National Natural Science Foundation of China(2147208481421091)+2 种基金the Qing Lan Project of Jiangsu Province and State Key Laboratory of Bioorganic & Natural Products ChemistryShanghai Institute of Organic ChemistryChinese Academy of Sciences
文摘An efficient and practical method is developed for the trifluoromethylation of enamides using Umemoto's reagent as the trifluoromethylating reagent. These reactions proceeded under visible light irradiation without any photocatalyst at room temperature in good chemical yields.
基金financially supported by A*STAR(AME-IRG-A20E5c0083)the National Natural Science Foundation of China(52006005)。
文摘Bright tunable light emission in the short wavelength range from sulfur nanodots was demonstrated with a photoluminescence quantum yield(PLQY)of up to 59.4%.A fission-aggregation mechanism was proposed for the formation of sulfur nanodots with desired performances.This synthetic strategy allowed for simultaneous size control from 3.2 to 5.6 nm,thus tuning the emission color from ultraviolet(UV)to deep blue(342±430 nm),and for the suppression of unwanted nonradiative recombination centers and deep level emission.The luminescence mechanism and quantum confinement effect of the synthesized sulfur nanodots were investigated by optical spectroscopy and theoretical calculations.These results show promise toward the application of sulfur nanodots in UV optoelectronics,biomedical treatments,and sterilization.
