Screening Libraries of Semifluorinated Arylene Bisimides to Discover and Predict Thermodynamically Controlled Helical Crystallization
作者:Ming-Shou Ho、Benjamin E. Partridge、Hao-Jan Sun、Dipankar Sahoo、Pawaret Leowanawat、Mihai Peterca、Robert Graf、Hans W. Spiess、Xiangbing Zeng、Goran Ungar、Paul A. Heiney、Chain-Shu Hsu、Virgil Percec
DOI:10.1021/acscombsci.6b00143
日期:2016.12.12
retrostructural analysis of a library containing 16 self-assembling perylene (PBI), 1,6,7,12-tetrachloroperylene (Cl4PBI), naphthalene (NBI), and pyromellitic (PMBI) bisimides functionalized with environmentally friendly AB3 chiral racemic semifluorinated minidendrons at their imide groups via m = 0, 1, 2, and 3 methylene units is reported. These semifluorinated compounds melt at lower temperatures than
包含16个自组装retro(PBI),1,6,7,12-四氯per(Cl 4 PBI),萘(NBI)和均苯四甲酸(PMBI)双酰亚胺的文库的合成,结构和逆构分析AB 3的手性外消旋半氟化半树枝状分子通过m报告了= 0、1、2和3个亚甲基单元。这些半氟化化合物的熔点低于同源氢化化合物的熔点,可通过结构分析筛选所有它们的热致相,从而从螺旋桨状,钝齿轮和倾斜分子以及层状结构中发现热力学控制的螺旋结晶。发现m = 0的螺旋桨状PBI,Cl 4 PBI和NBI具有热力学控制的螺旋结晶。出乎意料的是,扭曲的Cl 4 PBI的组装比平面PBI的组装具有更高的顺序。m = 1、2和3的PBI形成热动力学控制的倾斜螺旋列的柱状六角形2D晶格,具有列内顺序。PBI和Clm = 1的4 PBI通过最近发现的螺旋齿轮机理结晶,而m = 1的NBI和PMBI形成倾斜的螺旋柱。m = 2的PBI,NBI和PMBI生成层状结构。PBI的3D和2D组件与米=