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Structure properties relationships of liquid crystal bent core organic semiconductors based on benzo[2,1-b:3,4-b′]dithiophene-4,5-dione

2012; Royal Society of Chemistry; Volume: 22; Issue: 43 Linguagem: Inglês

10.1039/c2jm34803a

1364-5501

Hecham Aboubakr, M. G. Tamba, Abdou Karim Diallo, Christine Videlot‐Ackermann, L. Bélec, Olivier Siri, Jean‐Manuel Raimundo, Georg H. Mehl, Hugues Brisset,

Conducting polymers and applications

We report the synthesis of a new diketone bridged dithiophene end-capped with the mesogenic functionalities: 2,7′-bis(alkoxy-biphenyl) and 2,7′-bis(alkoxy-phenyl)-benzo[2,1-b:3,4-b′]dithiophene-4,5-dione. Optical and electrochemical properties in solution were investigated by UV-visible absorption and cyclic voltammetry. Liquid crystal properties of these new materials were investigated by differential scanning calorimetry, optical polarizing microscopy, and X-ray diffraction studies. Both compounds exhibit layered phases though there are differences in the organisation of the phase structures. Thin films were implemented as active layers into organic thin-film transistors to evaluate the charge transport properties.