Effect of side chain length on film structure and electron mobility of core-unsubstituted pyromellitic diimides and enhanced mobility of the dibrominated core using the optimized side chain
| العنوان: | Effect of side chain length on film structure and electron mobility of core-unsubstituted pyromellitic diimides and enhanced mobility of the dibrominated core using the optimized side chain |
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| المؤلفون: | Howard E. Katz, Josué F. Martínez Hardigree, Ming-Ling Yeh, Szu-Ying Wang, Vitaly Podzorov |
| المصدر: | Journal of Materials Chemistry C. 3:3029-3037 |
| بيانات النشر: | Royal Society of Chemistry (RSC), 2015. |
| سنة النشر: | 2015 |
| مصطلحات موضوعية: | Core (optical fiber), Diffraction, Absorbance, Crystallinity, Electron mobility, Crystallography, Materials science, Intermolecular force, Polymer chemistry, Materials Chemistry, Side chain, General Chemistry, Single crystal |
| الوصف: | Pyromellitic diimides (PyDIs) are π-conjugated electron-transport materials based on an unusually small aromatic core (benzene), which provides low temperature processing and transparency in much of the visible range. We synthesized PyDI derivatives with a systematic series of fluoroalkyl side chains and investigated their film structures and electrical performances in thin-film transistors. The effect of the length of the fluorinated segment in fluoroalkylmethylene side chains was examined. Shorter side chains within this series induce higher electron mobilities, with a maximum of 0.026 cm2 V−1 s−1 achieved with the perfluorobutylmethyl side chain. Atomic force microscopy images and X-ray diffraction peak widths were used as indications of crystallinity correlating with the mobility trend. The perfluorobutylmethyl side chain, when attached to 3,6-dibromo PyDI using a total of three synthetic steps, allowed nearly parallel PyDI cores and an exceptional mobility of 0.2 cm2 V−1 s−1, accompanied by a correspondingly excellent morphology and effective intermolecular packing illustrated by a single crystal X-ray structure. This is the highest PyDI mobility yet reported, and is an unusually high mobility for a compound with such a small core, having such low visible range absorbance, and requiring so few synthetic steps. |
| تدمد: | 2050-7534 2050-7526 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::89eb72941618b9ba4efb0f7d53bcd462 https://doi.org/10.1039/c4tc02611j |
| رقم الأكسشن: | edsair.doi...........89eb72941618b9ba4efb0f7d53bcd462 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20507534 20507526 |
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