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Fluorination-Induced Evolution of Columnar Packing in Fluorous Triphenylenes and Benzotriphenylenes.
ChemPlusChem ( IF 3.4 ) Pub Date : 2018-11-20 , DOI: 10.1002/cplu.201800451
Kerry C Rippy 1 , Nicholas J DeWeerd 1 , Igor V Kuvychko 1 , Yu-Sheng Chen 2 , Steven H Strauss 1 , Olga V Boltalina 1
Affiliation  

Use of D3h -symmetrical triphenylene (TRPH) as a substrate for high-temperature radical reactions with C4 F8 I2 under varying conditions resulted in the introduction of four types of fluorinated substituents: ω-C4 F8 H, c-C4 F8 , c-C4 F4 , and c-C4 HF3 . In contrast to the previous work on direct (poly)substitutions with RF groups in polycyclic aromatic hydrocarbons (PAHs), in this work regiospecificity, selectivity, and high yield were achieved for TRPH(C4 F8 ) and TRPH(C4 F8 )3 . New single-crystal structural data for seven compounds combined with literature crystallographic data allowed for the first detailed and precise analysis of the effects of fluorous substituent types, their number, and their position(s) on the TRPH core on the solid-state packing, and more specifically, the degree of π-π overlap between neighboring molecules, which is linked to charge transport properties. Comparison of isostructural partially fluorinated benzotriphenylenes, 2,3-TRPH(C4 F4 ) and 2,3-TRPH(C4 HF3 ), revealed an unexpectedly large (30 %) drop of π-π overlap, when only one fluorine atom was replaced with the hydrogen atom in a C4 F4 moiety. Theoretical and potentially practical implications of this work may include further testing and elaboration of computational methods describing solid-state interactions and predictions of transport properties of organic semiconductors, and further advances in the molecular design of high-performing TRPH-based organic materials and supramolecular architectures for organic optoelectronics.

中文翻译:

氟诱导的氟亚苯基和苯并三亚苯基中柱状堆积的演化。

使用D3h对称三亚苯基(TRPH)作为底物在不同条件下与C4 F8 I2进行高温自由基反应导致引入了四种类型的氟化取代基:ω-C4F8 H,c-C4 F8和c-C4 F4和c-C4 HF3。与先前关于在多环芳烃(PAHs)中具有RF基团的直接(多)取代的工作相反,在这项工作中,TRPH(C4 F8)和TRPH(C4 F8)3的区域特异性,选择性和高收率都得到了实现。七种化合物的新单晶结构数据与文献晶体学数据相结合,可以对固态取代基上的氟代取代基类型,其数量以及它们在TRPH核上的位置进行首次详细而精确的分析,更具体地说,相邻分子之间的π-π重叠程度,这与电荷传输特性有关。比较异结构部分氟化的苯并三苯撑2,3-TRPH(C4 F4)和2,3-TRPH(C4 HF3),发现当只有一个氟原子被取代时,π-π重叠的降幅出乎意料的大(30%)。 C 4 F 4部分中的氢原子。这项工作的理论和潜在的实践意义可能包括进一步测试和阐述描述固态相互作用的计算方法和有机半导体传输特性的预测,以及高性能基于TRPH的有机材料和超分子体系结构的分子设计的进一步发展用于有机光电。当C4 F4部分中只有一个氟原子被氢原子取代时,发现π-π重叠的液滴降落出乎意料的大(30%)。这项工作的理论和潜在的实践意义可能包括进一步测试和阐述描述固态相互作用的计算方法和有机半导体传输特性的预测,以及高性能基于TRPH的有机材料和超分子体系结构的分子设计的进一步发展用于有机光电。当C4 F4部分中只有一个氟原子被氢原子取代时,发现π-π重叠的液滴降落出乎意料的大(30%)。这项工作的理论和潜在的实践意义可能包括进一步测试和阐述描述固态相互作用的计算方法和有机半导体传输特性的预测,以及高性能基于TRPH的有机材料和超分子体系结构的分子设计的进一步发展用于有机光电。
更新日期:2018-11-20
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