作者:Frederik C. Krebs、Holger Spanggaard
DOI:10.1021/jo025592d
日期:2002.10.1
Compound 7 shows blue fluorescence with little solvent dependence (lambda(emission) = 410 nm in THF, CH2Cl2, and hexane), whereas compound 6 shows a highly solvent-dependent emission wavelength (lambda(emission) = 583 nm in THF, lambda(emission) = 560 nm in CH2Cl2, and lambda(emission) = 450 nm in hexane). The fluorescence red shift of compound 6 in a series of solvents with different polarity is discussed
通过合成和两个同构供体-受体-供体染料分子的光物理特性,研究了全氟化对光物理性质的影响。介绍了两种通用的氟化苯化合物1,4-二氟-2,5-二全氟辛基苯(1)和1,4-二溴-2,5-二氟-3,6-二全氟辛基苯(2)的合成。已经确定了2的X射线结构,并且表明全氟辛基链以固态从苯环离析,从而产生了层状结构。使用4-甲酰基苯硼酸与(2)和1,4-二溴-2,5-二辛基苯(3)通过Suzuki偶联反应进一步合成,分别得到1,4''-diformyl-2',5'-difluoro -3',6'-二全氟辛基-对-亚苯基(4)和1,4''-二甲酰基-2',5' -二辛基对-对亚苯基(5)。将二醛4和5与9,10-菲醌和碳酸氢铵在冰醋酸中缩合,得到染料分子1,4''-双(1H-菲[9,10-d]咪唑-2-基)-2 ',5'-二氟-3',6'-二全氟辛基-对-亚联苯基(6)和1,4''-双(1H-菲[9,10-d]咪唑-2-基)-2',