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Organic Semiconductor-Containing Supramolecules: Effect of Small Molecule Crystallization and Molecular Packing

Title
Organic Semiconductor-Containing Supramolecules: Effect of Small Molecule Crystallization and Molecular Packing
Authors
Rancatore B.J.Kim B.Mauldin C.E.Fréchet J.M.J.Xu T.
Ewha Authors
김봉수
SCOPUS Author ID
김봉수scopus
Issue Date
2016
Journal Title
Macromolecules
ISSN
0024-9297JCR Link
Citation
vol. 49, no. 3, pp. 833 - 843
Publisher
American Chemical Society
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Small molecules (SMs) with unique optical or electronic properties provide an opportunity to incorporate functionality into block copolymer (BCP)-based supramolecules. However, the assembly of supramolecules based on these highly crystalline molecules differs from their less crystalline counterparts. Here, two families of organic semiconductor SMs are investigated, where the composition of the crystalline core, the location (side- vs end-functionalization) of the alkyl solubilizing groups, and the constitution (branched vs linear) of the alkyl groups are varied. With these SMs, we present a systematic study of how the phase behavior of the SMs affects the overall assembly of these organic semiconductor-based supramolecules. The incorporation of SMs has a large effect on the interfacial curvature, the supramolecular periodicity, and the overall supramolecular morphology. The crystal packing of the SM within the supramolecule does not necessarily lead to the assembly of the comb block within the BCP microdomains, as is normally observed for alkyl-containing supramolecules. An unusual lamellar morphology with a wavy interface between the microdomains is observed due to changes in the packing structure of the small molecule within BCP microdomains. Since the supramolecular approach is modular and small molecules can be readily switched out, present studies provide useful guidance toward access supramolecular assemblies over several length scales using optically active and semiconducting small molecules. © 2016 American Chemical Society.
DOI
10.1021/acs.macromol.5b02449
Appears in Collections:
사범대학 > 과학교육과 > Journal papers
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