In the presence of catalytic amount of cesium hydroxide the hydrothiolation of alkynyl selenides occurred at room temperature in DMF under nitrogen atmosphere to give exclusive（Z）-1-organoseleno-2-arylthio-1-alkene ...In the presence of catalytic amount of cesium hydroxide the hydrothiolation of alkynyl selenides occurred at room temperature in DMF under nitrogen atmosphere to give exclusive（Z）-1-organoseleno-2-arylthio-1-alkene in excellent yields.It could provide a new and expedient way for the preparation of（Z）-1-arylseleno-2-arylthio-1-alkene.展开更多
Organic light-emitting diodes(OLEDs)based on purely organic room-temperature phosphorescence(RTP)materials often encounter issues of relatively low efficiency and spectral instability.To overcome these limitations,thr...Organic light-emitting diodes(OLEDs)based on purely organic room-temperature phosphorescence(RTP)materials often encounter issues of relatively low efficiency and spectral instability.To overcome these limitations,three(arylthio)benzene derivatives(4S,5S,and 6S)with gradually increased RTP component are designed and compared.Theoretical calculation and photophysical investigation reveal that the fully substituted arylthio effect could enhance the aggregation-induced phosphorescence,enlarge the spin orbital coupling,and reduce the energy gap between S_(1)and T_(1)as much as possible.As a result,6S can exhibit single spectra in films with a high phosphorescence efficiency of up to 76.7%,and its doped RTP-OLED furnishes a high maximum external quantum efficiency(EQE)of 15.3%and ultra-stable spectra with the brightness raised from 30 to 2000 cd m^(−2).Furthermore,serving 6S as the sensitizer,the RTP-sensitized-fluorescent OLEDs based on fluorescence dopant TBRb and multiple resonance type dopant BN3 both show near three times improvement in electroluminescence performance,with EQE values of 11.3%and 25.6%,respectively.These results demonstrate the feasibility of fully substituted arylthio effect in designing RTP materials and could advance the development of high-performance RTP OLEDs.展开更多
The present paper covers the 199 Hg NMR chemical shifts of 24 substituted diphenylmercurials and phenyl(2-benzothiazolylthio)mercurials. There is a good linear relationship between the chemical shift and the Hammett c...The present paper covers the 199 Hg NMR chemical shifts of 24 substituted diphenylmercurials and phenyl(2-benzothiazolylthio)mercurials. There is a good linear relationship between the chemical shift and the Hammett constant of the substituents for both series of compounds, and electron donating substituents cause the chemical shift towards downfield.展开更多
采用Chiralcel OD H和Chiralpak AD H手性柱,研究5种新近合成的外消旋双芳基硒代甘油硫醚和 4 种芳基硒代甘油烷氧醚对映体的高效液相色谱拆分方法.对比这两种手性固定相、异丙醇和乙醇流动相调节剂、以及样品结构对硒代甘油醚色谱拆分...采用Chiralcel OD H和Chiralpak AD H手性柱,研究5种新近合成的外消旋双芳基硒代甘油硫醚和 4 种芳基硒代甘油烷氧醚对映体的高效液相色谱拆分方法.对比这两种手性固定相、异丙醇和乙醇流动相调节剂、以及样品结构对硒代甘油醚色谱拆分的影响.除样品(1c)外,其他8个外消旋硒代甘油醚样品均可达到基线拆分.展开更多
基金Natural Science Foundation of Hunan(No.2009NK3162)National Natural Science Foundation of China(No.21003040,20372020) for financial support
文摘In the presence of catalytic amount of cesium hydroxide the hydrothiolation of alkynyl selenides occurred at room temperature in DMF under nitrogen atmosphere to give exclusive（Z）-1-organoseleno-2-arylthio-1-alkene in excellent yields.It could provide a new and expedient way for the preparation of（Z）-1-arylseleno-2-arylthio-1-alkene.
基金supported by the National Natural Science Foundation of China(52473173)Natural Science Foundation of Guangdong Province(2022B1515020084)+5 种基金Guangdong Basic and Applied Basic Research Foundation(2023B1515040003)Key Project of Yunnan Provincial Department of Science and Technology(202303AC100021)Independent Research Project of State Key Lab of Luminescent Materials and Devices(SCUT)(Skllmd-2024-10)Key-Area Research and Development Program of Guangdong Province(2024B0101040001)Science and Technology Program of Guangzhou(2023A04J0988)the Innovation and Technology Commission(ITC-CNERC14SC01).
文摘Organic light-emitting diodes(OLEDs)based on purely organic room-temperature phosphorescence(RTP)materials often encounter issues of relatively low efficiency and spectral instability.To overcome these limitations,three(arylthio)benzene derivatives(4S,5S,and 6S)with gradually increased RTP component are designed and compared.Theoretical calculation and photophysical investigation reveal that the fully substituted arylthio effect could enhance the aggregation-induced phosphorescence,enlarge the spin orbital coupling,and reduce the energy gap between S_(1)and T_(1)as much as possible.As a result,6S can exhibit single spectra in films with a high phosphorescence efficiency of up to 76.7%,and its doped RTP-OLED furnishes a high maximum external quantum efficiency(EQE)of 15.3%and ultra-stable spectra with the brightness raised from 30 to 2000 cd m^(−2).Furthermore,serving 6S as the sensitizer,the RTP-sensitized-fluorescent OLEDs based on fluorescence dopant TBRb and multiple resonance type dopant BN3 both show near three times improvement in electroluminescence performance,with EQE values of 11.3%and 25.6%,respectively.These results demonstrate the feasibility of fully substituted arylthio effect in designing RTP materials and could advance the development of high-performance RTP OLEDs.
文摘The present paper covers the 199 Hg NMR chemical shifts of 24 substituted diphenylmercurials and phenyl(2-benzothiazolylthio)mercurials. There is a good linear relationship between the chemical shift and the Hammett constant of the substituents for both series of compounds, and electron donating substituents cause the chemical shift towards downfield.
文摘采用Chiralcel OD H和Chiralpak AD H手性柱,研究5种新近合成的外消旋双芳基硒代甘油硫醚和 4 种芳基硒代甘油烷氧醚对映体的高效液相色谱拆分方法.对比这两种手性固定相、异丙醇和乙醇流动相调节剂、以及样品结构对硒代甘油醚色谱拆分的影响.除样品(1c)外,其他8个外消旋硒代甘油醚样品均可达到基线拆分.
