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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemistry
Alkyl substituted dithienothieno[2,3-d;2′,3′-d′]benzo[1, 2-b:4,5-b′]dithiophenes as solution-processable hexathiaheptacenes
Journal of Materials Chemistry C, Volume 2, No. 18, Year 2014
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Description
Solution-processable hexathiaheptacene dithienothieno[2,3-d;2′, 3′-d′]benzo[1,2-b:4,5-b′]dithiophenes (DTTBDT a-d) with various alkyl groups were synthesized by triflic acid induced ring closure. UV/Vis absorption, photoluminescence spectroscopy and cyclic voltammetry combined with density functional theory quantum-chemical calculations were performed to determine the photophysical and the electrochemical properties of DTTBDT a-d. In addition, the new hexathiaheptacenes show liquid crystalline properties dependent on their alkyl chain length. As observed from differential scanning calorimetry and polarized optical microscopy compared with DTTBDT a and b, DTTBDT c and d exhibit thermotropic liquid crystalline textures due to the rigid conjugated skeleton and the flexible long alkyl chains. For all four derivatives, the structural analysis indicates the formation of lamellar structures in which, surprisingly, the molecules are poorly packed. This molecular disorder is the main reason for the low performance of the p-type field-effect transistors. This journal is © the Partner Organisations 2014.
Authors & Co-Authors
Chen, Lie
Germany, Mainz
Max Planck Institute for Polymer Research
China, Nanchang
Nanchang University
Baumgarten, Martin
Germany, Mainz
Max Planck Institute for Polymer Research
Guo, Xin
Germany, Mainz
Max Planck Institute for Polymer Research
Li, Mengmeng
Germany, Mainz
Max Planck Institute for Polymer Research
Marszalek, Tomasz
Germany, Mainz
Max Planck Institute for Polymer Research
Alsewailem, Fares D.
Saudi Arabia, Riyadh
Petrochemical Research Institute
Pisula, Wojciech
Germany, Mainz
Max Planck Institute for Polymer Research
Müllen, Klaus
Germany, Mainz
Max Planck Institute for Polymer Research
Statistics
Citations: 8
Authors: 8
Affiliations: 3
Identifiers
Doi:
10.1039/c3tc32478h
ISSN:
20507534
e-ISSN:
20507526