Synthesis and Photophysical Properties of Dimethoxybis(3,3,3-trifluoropropen-1-yl)benzenes: Compact Chromophores Exhibiting Violet Fluorescence in the Solid State
作者:Masaki Shimizu、Youhei Takeda、Masahiro Higashi、Tamejiro Hiyama
DOI:10.1002/asia.201100176
日期:2011.9.5
4‐(MeO)2‐2,5‐[(E)‐CF3CH=CH]2 benzene ((E)‐3) ended at 406 nm. These findings indicate that the effective conjugation length of (E)‐3 was significantly larger than those of 1 and 2. Consistently, 1 and 2 in cyclohexane exhibited fluorescence with emission maxima in the UV region, whereas (E)‐3 in cyclohexane emitted violet light with an emission maximum at 407 nm. All the fluorescence spectra of 1–3 in various
Dimethoxybis(3,3,3- trifluo-ropropen -1-基)苯是通过与CF diiododimethoxybenzenes的钯-催化的双交叉偶联反应制备3 C≡CZnCl,接着还原CF的3上LiAlHC≡C基团4在Lindlar催化剂存在下的H 2或H 2。的1,2-吸收光谱(MEO)的边缘2 -4,5-(CF 3 CHC = CH)2个苯1和1,3-(MEO)2 -4,6-(CF 3 CH = CH )2个苯2在环己烷中范围从348至360nm,而1,4-吸收光谱(MEO)2 -2,5 - [(ë)-CF3 CH = CH] 2苯((E)-3)终止于406 nm。这些发现表明(E)-3的有效共轭长度显着大于1和2的有效共轭长度。一致地,环己烷中的1和2在紫外区域表现出最大的荧光,而环己烷中的(E)-3则发出紫光,其最大发射波长为407 nm。的所有的荧光光谱1 -