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Directed Assembly of Hierarchical Supramolecular Block Copolymers: A Strategy To Create Donor−Acceptor Charge-Transfer Stacks

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dc.contributor.author Deepthi, K
dc.contributor.author Amal, R R B
dc.contributor.author Rajeev, V R
dc.contributor.author Unni, K N N
dc.contributor.author Gowd, E B
dc.date.accessioned 2019-07-22T15:16:08Z
dc.date.available 2019-07-22T15:16:08Z
dc.date.issued 2019-03-26
dc.identifier.citation Macromolecules; 52(7):2889-2899 en_US
dc.identifier.uri https://pubs.acs.org/doi/abs/10.1021/acs.macromol.8b02448
dc.description.abstract The hierarchical self-assembly of the charge-transfer (CT) complexes in the solid state is of paramount importance to dictate the performance of electronic devices. In this work, we describe a three-component hierarchical self-assembly approach to generate stable alternate donor–acceptor (D–A) assemblies within block copolymer microdomains by involving the supramolecular approach in self-assembly of block copolymers. So far, the assembly between a single small molecule and block copolymer was explored to obtain block copolymer supramolecules. Here we report block copolymer supramolecules composed of two small molecules (donor and acceptor) and polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP). 1-Pyrenebutyric acid (PBA, donor) forms hydrogen bonding with P4VP and aromatic interactions with naphthalene diimide (NDI, acceptor) to generate CT complexes within the block copolymer domains in the solid state. Using FTIR, SAXS, WAXS, TEM, UV/vis spectroscopy, and photoluminescence spectroscopy measurements, we demonstrate the formation of hierarchical structures and CT complexes between PBA and NDI. Space charge limited current analysis showed the enhanced charge carrier mobility in PS-b-P4VP (PBA+NDI) supramolecules compared to that in the physical blends of PBA+NDI. The organization of donor and acceptor molecules within the block copolymer microdomains opens up new insight into the area of electronic devices because of its advantages such as solution processability, controlled formation of hierarchical assemblies, and the CT interaction in the solid state. en_US
dc.language.iso en en_US
dc.publisher American Chemical Society en_US
dc.title Directed Assembly of Hierarchical Supramolecular Block Copolymers: A Strategy To Create Donor−Acceptor Charge-Transfer Stacks en_US
dc.type Article en_US

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  • 2019
    Research articles authored by NIIST researchers published in 2019

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