Vinylsilafluorene(VSiF) was successfully synthesized and copolymerized with vinylcarbazole and methyl methacrylate via free radical copolymerization for the first time.The synthesis,photophysical properties,computatio...Vinylsilafluorene(VSiF) was successfully synthesized and copolymerized with vinylcarbazole and methyl methacrylate via free radical copolymerization for the first time.The synthesis,photophysical properties,computational modeling studies,and organic light-emitting devices of the VSiF copolymers were presented.The good coordinated photoluminescent(PL) spectra with the absorption of blue light-emitting materials and the high energy band-gap of the VSiF copolymers were observed.Higher triplet band gap(3Eg) to host the blue phosphorescent emitters and better HOMO and LUMO than PVK for electron and hole injection and transportation of the VSiF model compounds were revealed by density functional theory(DFT) calculations.The preliminary device results in applications of these copolymers as host materials for green phosphorescent emitters demonstrate the copolymers of VSiF and vinylcarbazole have comparable device performance of polyvinylcarazole(PVK),suggesting a bright future of VSiF as building blocks for host materials.展开更多
通过比较浸叶法、药膜法和Potter喷雾法3种生测方法对螺旋粉虱成虫进行生物测定,确定了喷雾法是螺旋粉虱适宜的生测方法。优化了Potter喷雾法的操作因子,当喷雾量为1~2 m L、喷雾压力为50~100 k Pa、沉降时间为20~40 s时,Potter喷雾法...通过比较浸叶法、药膜法和Potter喷雾法3种生测方法对螺旋粉虱成虫进行生物测定,确定了喷雾法是螺旋粉虱适宜的生测方法。优化了Potter喷雾法的操作因子,当喷雾量为1~2 m L、喷雾压力为50~100 k Pa、沉降时间为20~40 s时,Potter喷雾法的测定结果更准确、可靠。确证了采用螺旋粉虱自然混合日龄成虫作为试虫的可靠性。该方法可作为螺旋粉虱药剂筛选及抗药性监测的生物测定方法。展开更多
基金supported by the National Basic Research Program of China (973 Program) (2009CB930601)National Natural Science Foundation of China (20804020,60976019,and 20974046)+3 种基金Program for New Century Excellent Talents in University (NCET-07-0446)Natural Science Foundation of Jiangsu College Council (Grant No. 08KJB150012)Scientific and Technological Innovation Teams of Colleges and Universities in Jiangsu Province (TJ207035)Nanjing University of Posts and Telecommunications (NY207161)
文摘Vinylsilafluorene(VSiF) was successfully synthesized and copolymerized with vinylcarbazole and methyl methacrylate via free radical copolymerization for the first time.The synthesis,photophysical properties,computational modeling studies,and organic light-emitting devices of the VSiF copolymers were presented.The good coordinated photoluminescent(PL) spectra with the absorption of blue light-emitting materials and the high energy band-gap of the VSiF copolymers were observed.Higher triplet band gap(3Eg) to host the blue phosphorescent emitters and better HOMO and LUMO than PVK for electron and hole injection and transportation of the VSiF model compounds were revealed by density functional theory(DFT) calculations.The preliminary device results in applications of these copolymers as host materials for green phosphorescent emitters demonstrate the copolymers of VSiF and vinylcarbazole have comparable device performance of polyvinylcarazole(PVK),suggesting a bright future of VSiF as building blocks for host materials.
文摘通过比较浸叶法、药膜法和Potter喷雾法3种生测方法对螺旋粉虱成虫进行生物测定,确定了喷雾法是螺旋粉虱适宜的生测方法。优化了Potter喷雾法的操作因子,当喷雾量为1~2 m L、喷雾压力为50~100 k Pa、沉降时间为20~40 s时,Potter喷雾法的测定结果更准确、可靠。确证了采用螺旋粉虱自然混合日龄成虫作为试虫的可靠性。该方法可作为螺旋粉虱药剂筛选及抗药性监测的生物测定方法。
