Excessive-performance FDTE-based polymer semiconductors with F⋯H intramolecular noncovalent interactions: Synthesis, characterization, and their field-effect properties

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Eliran Assa

Highlights

Two FDTE-based copolymers, PFDTE1 and PFDTE2, have been synthetized and characterised.

Double F⋯H hydrogen bonds induce elevated torsional potential for FDTE unit.

The opening/electron mobilities of 5.42/0.36 cm2 V−1 s−1 have been obtained for PFDTE2.

Each copolymers fashioned extremely ordered skinny movies with shut π-packing.

Summary

Herein, we report two novel donor-acceptor copolymers, PFDTE1 and PFDTE2, based mostly on (E)-1,2-bis(3-fluorothiophen-2-yl)ethene (FDTE) moiety. X-ray diffraction crystallography indicated that F⋯H hydrogen bonds exist in single FDTE unit. Theoretical simulation outcomes revealed that the FDTE unit owns elevated torsional potential because of the presence of fluorine-induced intramolecular noncovalent interactions. The 2 copolymers exhibited ambipolar provider transport traits, with gap/electron mobilities of 4.24/0.30 cm2 V−1 s−1 for PFDTE1 and 5.42/0.36 cm2 V−1 s−1 for PFDTE2. The complementary-like inverters based mostly on PFDTE2 have been additionally efficiently fabricated and confirmed excessive achieve values of 104 and 115, respectively, offering potential in ambipolar complementary-like inverters. AFM and 2D-GIXRD analyses revealed that the 2 copolymers fashioned lamellar, edge-on molecular packing, and crystalline skinny movies with small ππ stacking distances down to three.55 Å.

Key phrases

Dithienylethylene

Intramolecular noncovalent interplay

Fluorine atom

Spine conformation

Polymer field-effect transistor

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Eliran Assa