Side-chain induced chirality in diketopyrrolopyrrole based polymers

Maity, S and Bedi, A and Patil, S (2021) Side-chain induced chirality in diketopyrrolopyrrole based polymers. In: Journal of Polymer Science .

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Abstract

Chiral all-�-conjugated conducting polymers are of significant importance because of their promising aspects ranging from organic electronics, organic spin filters, efficient water splitting materials, magneto-optic materials to circularly polarized light emitters. Here, we report the synthesis and characterization of the first series of diketopyrrolopyrrole based chiral low band-gap alternating copolymers. Alongside characterizations by UV and CD spectroscopy, AFM and FESEM were further performed to understand the morphology of the optically active polymers. The stereochemistry of the side-chains on TDPP unit played a pivotal role in determining chiroptical properties and supramolecular self-assembly of the copolymers in solution which lead to layer-by-layer helical morphology in solid-state. Interestingly, D-A intramolecular charge transfer transition showed Cotton effect with bimodal nature, which is remarkably stronger than the �-�* transition. © 2021 Wiley Periodicals LLC

Item Type:	Journal Article
Publication:	Journal of Polymer Science
Publisher:	John Wiley and Sons Inc
Additional Information:	The copyright for this article belongs to John Wiley and Sons Inc
Keywords:	Charge transfer; Chirality; Conducting polymers; Energy gap; Morphology; Supramolecular chemistry, Conjugated conducting polymers; Diketopyrrolopyrroles; Helical morphologies; Induced chirality; Optical activity; Organic electronics; Organics; Side-chains; Spin filters; Supramolecular chirality, Conjugated polymers
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	26 Nov 2021 10:42
Last Modified:	26 Nov 2021 10:42
URI:	http://eprints.iisc.ac.in/id/eprint/70467

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