Effect of Molecular Structure of α,α′-Dialkylquaterthiophenes and Their Organosilicon Multipods on Ordering, Phase Behavior, and Charge Carrier Mobility
| Autor: | Sergei N. Chvalun, Dmitri A. Ivanov, Maxim A. Shcherbina, Timo Meyer-Friedrichsen, Stephan Kirchmeyer, Ahmed Mourran, Oleg V. Borshchev, Andreas Elschner, Sergei A. Ponomarenko, Artem V. Bakirov, Denis V. Anokhin, Martin Moeller, Matthieu Defaux, Yury N. Luponosov |
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| Rok vydání: | 2012 |
| Předmět: |
chemistry.chemical_classification
Diffraction Charge carrier mobility Disiloxane Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound Crystallography General Energy Differential scanning calorimetry chemistry Molecule Thermal stability Physical and Theoretical Chemistry Alkyl Organosilicon |
| Zdroj: | The Journal of Physical Chemistry C. 116:22727-22736 |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | We report on bulk structures of a family of quaterthiophene (4T) derivatives with linear and branched end groups such as α,α′-dihexylquaterthiophene (Hex-4T-Hex), α,α′-didecyl-quaterthiophene (Dec-4T-Dec) and α,α′-bis(2-ethylhexyl)quaterthiophene (EH-4T-EH), tetramethyldisiloxane-based dimers D2-Und-4T-EH and D2-Und-4T-Hex, and carbosilane-siloxane-based tetramers D4-Und-4T-EH and D4-Und-4T-Hex. The dimers and tetramers contain undecylenic (Und) spacers between the disiloxane and 4T- units of the molecule. The impact of the molecular architecture on the bulk structure at different temperatures is addressed with X-ray diffraction and differential scanning calorimetry. For all of the studied quaterthiophene-containing organosilicon multipods the formation of 4T-crystal sublattice is observed. The alkyl periphery plays an important role in the molecular packing and thermal stability of the ordered phase. They can stabilize or destabilize the crystal phase, depending on their length and architecture. The quat... |
| Databáze: | OpenAIRE |
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