Bis-isatin based polymers with tunable energy levels for organic field-effect transistor applications. Issue 15 (30th March 2021)

• Record Type: Journal Article
• Authors: Yang, Wei; Sun, Mingxiang; Wang, Yue; Yan, Hui; Zhang, Guobing; Zhang, Qing
• Is Part Of: Polymer chemistry. Volume 12:Issue 15(2021)
• Page Start: 2317
• Page End: 2324
• Publication Date: 2021-03-30
• Subjects: Polymers -- Periodicals; Macromolecules -- Periodicals; Polymerization -- Periodicals; 547.705
• DOI: 10.1039/d0py01726d
• Languages: English
• ISSNs: 1759-9954

Abstract

Abstract : Two bis-isatin based building blocks have been synthesized with the aid of non-covalent intramolecular interactions. Their polymers showed p-type or ambipolar charge transport in OFETs. Abstract : Bis-isatin based monomers with elongated π-conjugation have been synthesized. The main conjugation pathways of the new monomers included eighteen sp 2 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.