Topological Transformation of π-Conjugated Molecules Reduces Resistance to Crystallization

Cheng Zhou, Qiuhong Cui, Caitlin McDowell, Martin Seifrid, Xiankai Chen, Jean Luc Brédas, Ming Wang, Fei Huang, Guillermo C. Bazan

研究成果: Contribution to journalArticle査読

10 被引用数 (Scopus)


Two electronically delocalized molecules were designed as models to understand how molecular shape impacts the tradeoff between solubility and crystallization tendencies in molecular semiconductors. The more soluble compound TT contains a non-planar bithiophene central fragment, whereas CT has a planar cyclopentadithiophene unit. Calorimetry studies show that CT can crystallize more easily than TT. However, absorption spectroscopy shows that the initially amorphous TT film can eventually form crystals in which the molecular shape is significantly more planar. Two thermally reversible polymorphs for TT were observed by XRD and grazing-incidence wide-angle X-ray scattering (GIWAXS) measurements. These findings are relevant within the context of designing soft semiconductors that exhibit high solubility and a tendency to provide stable organized structures with desirable electronic properties.

ジャーナルAngewandte Chemie - International Edition
出版ステータス出版済み - 8 1 2017

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

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