Issue 15, 2021

Bis-isatin based polymers with tunable energy levels for organic field-effect transistor applications

Abstract

Bis-isatin based monomers with elongated π-conjugation have been synthesized. The main conjugation pathways of the new monomers included eighteen sp2 hybridized carbons. The Z configuration of the double bond in the 3-(thiophen-2-ylmethylene)indolin-2-one moiety was assigned directly by crystal structure analysis. Single-crystal X-ray diffraction analysis also revealed that the extended planar structure in the monomer BTEI-C8 was facilitated by through-space intramolecular interactions. The planar structure and dipole interactions enabled close intermolecular packing of BTEI-C8 in the solid state. Two new π-conjugated polymers were also synthesized, and their HOMO/LUMO energy levels can be adjusted by cyano substitutions on the vinyl linkers. The OFET devices based on the polymers showed p-type or ambipolar charge transport properties.

Graphical abstract: Bis-isatin based polymers with tunable energy levels for organic field-effect transistor applications

Supplementary files

Article information

Article type
Paper
Submitted
21 Dec 2020
Accepted
20 Mar 2021
First published
23 Mar 2021

Polym. Chem., 2021,12, 2317-2324

Bis-isatin based polymers with tunable energy levels for organic field-effect transistor applications

W. Yang, M. Sun, Y. Wang, H. Yan, G. Zhang and Q. Zhang, Polym. Chem., 2021, 12, 2317 DOI: 10.1039/D0PY01726D

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