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Measuring order in regioregular poly(3-hexylthiophene) with solid-state 13C CPMAS NMR

Published

Author(s)

Ryan C. Nieuwendaal, Chad R. Snyder, Dean M. DeLongchamp

Abstract

We report on details of molecular packing in high molar mass poly(3-hexylthiophene) (P3HT) by solid-state 13C {1H} cross-polarization magic angle spinning (CPMAS) NMR measurements. The degree of polymer order was estimated for two films of varied drying conditions via x-ray diffraction and differential scanning calorimetry. In the 13C NMR spectra, we find that linewidths of the thiophene carbons of P3HT are particularly sensitive to local polymer order, and, in turn, crystal quality. We find that side chain mobility plays a critical role in distorting the main chain in crystalline P3HT and these distortions affect 13C NMR linewidths at lower temperatures ( 0 °C), where narrower resonances are observed, P3HT main chain torsional re-orientations occur on time scales
Citation
ACS Macro Letters
Volume
3
Issue
2

Keywords

ORGANIC ELECTRONICS, SOLID-STATE NMR, CRYSTALLINITY, P3HT, MORPHOLOGY, CONDIS CRYSTAL, CONFORMATIONAL HETEROGENEITY

Citation

Nieuwendaal, R. , Snyder, C. and DeLongchamp, D. (2014), Measuring order in regioregular poly(3-hexylthiophene) with solid-state 13C CPMAS NMR, ACS Macro Letters, [online], https://doi.org/10.1021/mz4005343 (Accessed July 24, 2024)

Issues

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Created January 10, 2014, Updated November 10, 2018