两个不同分子共轭的共轭小分子,4',4''-(diazene-1,2-diyl)bis(2',3',5',6'-tetrafluoro- N , N - diphenyl-[1, 1'-联苯]-4-胺) ( TPA-azo-TPA ) 和 4,4'-(perfluorophenazine-2,7-diyl)bis( N , N -diphenylaniline) ( TPA-ph-TPA ),其中电子供体三苯胺部分使用不同的受电子偶氮苯或吩嗪嵌段进行桥接,设计并合成。TPA -ph-TPA具有较大共轭受体的分子规则地形成纳米晶膜,并且制造的存储器件表现出出色的非易失性一次读取多次(WORM)存储效应,其开/关比是TPA-偶氮-TPA的十倍。使用理论计算,推测记忆性能是电场诱导的电荷转移效应的结果,受体分子共轭的增强器件性能是因为存在强电荷转移效应。实验结果表明,分子共轭策略可以通过增强强电
两个不同分子共轭的共轭小分子,4',4''-(diazene-1,2-diyl)bis(2',3',5',6'-tetrafluoro- N , N - diphenyl-[1, 1'-联苯]-4-胺) ( TPA-azo-TPA ) 和 4,4'-(perfluorophenazine-2,7-diyl)bis( N , N -diphenylaniline) ( TPA-ph-TPA ),其中电子供体三苯胺部分使用不同的受电子偶氮苯或吩嗪嵌段进行桥接,设计并合成。TPA -ph-TPA具有较大共轭受体的分子规则地形成纳米晶膜,并且制造的存储器件表现出出色的非易失性一次读取多次(WORM)存储效应,其开/关比是TPA-偶氮-TPA的十倍。使用理论计算,推测记忆性能是电场诱导的电荷转移效应的结果,受体分子共轭的增强器件性能是因为存在强电荷转移效应。实验结果表明,分子共轭策略可以通过增强强电
Fluorinated azobenzenes with highly strained geometries for halogen bond-driven self-assembly in the solid state
作者:Oleksandr S. Bushuyev、Davin Tan、Christopher J. Barrett、Tomislav Friščić
DOI:10.1039/c4ce01216j
日期:——
Attempted cocrystallisation of brominated and iodinated octafluoroazobenzene derivatives with morpholine led to the exhaustive replacement of fluorine substituents that are in ortho-positions to the azobenzene with sterically demanding morpholine groups. The resulting molecules exhibit a highly unusual strained conformation of the azobenzene unit, in which the terminal phenyl rings adopt a mutually nearly completely orthogonal orientation. Substitution of ortho-fluorine groups with N-morpholine fragments provides molecules with active halogen bond donor and acceptor sites that guide the molecular self-assembly in the solid state towards the formation of polymeric halogen-bonded chains.
Changing molecular conjugation with a phenazine acceptor for improvement of small molecule-based organic electronic memory performance
作者:Quan Liu、Caibin Zhao、Guanghui Tian、Hongguang Ge
DOI:10.1039/c7ra11932a
日期:——
the enhanced device performance of the acceptor molecular conjugation is because of the presence of a strong charge transfer effect. The experimental findings suggest that the strategy of molecular conjugation may promote the performance of small molecule-based organic electronic memory devices by an enhanced a strong charge transfer effect.
两个不同分子共轭的共轭小分子,4',4''-(diazene-1,2-diyl)bis(2',3',5',6'-tetrafluoro- N , N - diphenyl-[1, 1'-联苯]-4-胺) ( TPA-azo-TPA ) 和 4,4'-(perfluorophenazine-2,7-diyl)bis( N , N -diphenylaniline) ( TPA-ph-TPA ),其中电子供体三苯胺部分使用不同的受电子偶氮苯或吩嗪嵌段进行桥接,设计并合成。TPA -ph-TPA具有较大共轭受体的分子规则地形成纳米晶膜,并且制造的存储器件表现出出色的非易失性一次读取多次(WORM)存储效应,其开/关比是TPA-偶氮-TPA的十倍。使用理论计算,推测记忆性能是电场诱导的电荷转移效应的结果,受体分子共轭的增强器件性能是因为存在强电荷转移效应。实验结果表明,分子共轭策略可以通过增强强电