Fluorine Segregation in Crystalline Materials: Structural Control and Solid-State [2+2] Cycloaddition in CF3-Substituted Tetrathiafulvalene Derivatives
作者:Olivier Jeannin、Marc Fourmigué
DOI:10.1002/chem.200501078
日期:2006.4.3
number of CF(3) moieties. Tetrathiafulvalene (TTF) derivatives bearing one or two CF(3) groups, that is, (Z)- and (E)-(CF(3))(2)TTF ((Z)-1, (E)-1), EDT-TTF-CF(3) (2), and EDT-TTF(CF(3))(2) (3) (EDT=ethylenedithio) are prepared from the 1,3-dipolar reaction of methyl 4,4,4-trifluorotetrolate with ethylenetrithiocarbonate. The structures of neutral (Z)-1, (E)-1, 2, and 3 as indicated by single-crystal X-ray
此处,在基于仅带有有限数量CF(3)部分的硬质芳族分子的晶体材料领域中,评估了长全氟化链对液晶中间相或介观胶束排列中两亲分子的结构和稳定性的众所周知的影响。带有一个或两个CF(3)基团的四硫富瓦烯(TTF)衍生物,即(Z)-和(E)-(CF(3))(2)TTF((Z)-1,(E)-1) ,EDT-TTF-CF(3)(2)和EDT-TTF(CF(3))(2)(3)(EDT =乙二硫基)由甲基4,4的1,3-偶极反应制备,用三硫代碳酸亚乙酯酯化4-三氟四氟酸酯。中性(Z)-1,(E)-1,2,的结构 单晶X射线衍射测量表明,图3和图3揭示了层状结构的反复形成,其中含氟部分的强烈分离和含氟双层的形成,这归因于CF(3)官能化后这些TTF衍生物的两亲特性,并且不需要更长的C(n)F(2n + 1)(n> 1)全氟链。在(E)-1的层状结构中观察到的外部C == C双键之间的分子间距离短,可实现固态[2