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Anisotropic microfibres of a liquid-crystalline diketopyrrolopyrrole by self-assembly-assisted electrospinning†
Nanoscale Horizons ( IF 9.7 ) Pub Date : 2018-09-20 00:00:00 , DOI: 10.1039/c8nh00219c
Markus Hecht 1, 2, 3, 4 , Bartolome Soberats 2, 3, 4, 5 , Jian Zhu 4, 6, 7, 8 , Vladimir Stepanenko 1, 2, 3, 4 , Seema Agarwal 4, 6, 7, 8 , Andreas Greiner 4, 6, 7, 8 , Frank Würthner 1, 2, 3, 4, 5
Affiliation  

Electrospinning is a well-established technique for the preparation of nanofibres from polymer solution or melt, however it is rarely applied for small molecules. Here we report a unique example of a liquid-crystalline (LC) diketopyrrolopyrrole (DPP) dye that was successfully used for electrospinning. Micrometric fibres with anisotropic alignment of DPP dye were produced by this process as shown by polarized optical microscopy and selected area electron diffraction. This newly designed DPP dye self-assembles in solution by hydrogen bonding and π–π-interactions and forms columnar LC phases in the bulk. X-ray scattering and polarized FT-IR studies in the LC state revealed a hierarchical arrangement of DPP molecules into columnar structures. The successful preparation of anisotropic microfibers by electrospinning is attributed to the hydrogen bond-directed supramolecular polymerization of the new DPP dye in solution and its LC properties.

中文翻译:

液晶二酮吡咯并吡咯通过自组装辅助静电纺丝的各向异性微纤维

电纺丝是从聚合物溶液或熔体制备纳米纤维的成熟技术,但是很少用于小分子。在这里,我们报告了成功用于电纺丝的液晶(LC)二酮吡咯并吡咯(DPP)染料的独特示例。通过偏光光学显微镜和选择区域电子衍射表明,通过这种方法可以生产出具有DPP染料各向异性取向的微米级纤维。这种新设计的DPP染料通过氢键和π-π相互作用在溶液中自组装,并在本体中形成柱状LC相。LC态下的X射线散射和极化FT-IR研究表明DPP分子分层排列成柱状结构。
更新日期:2018-09-20
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