Liquid crystalline supramolecular crosslinked polymer complexes of ditopic rylenebisimides and P4VP

TitleLiquid crystalline supramolecular crosslinked polymer complexes of ditopic rylenebisimides and P4VP
Publication TypeJournal Article
Year of Publication2017
AuthorsSaibal, B, Narayan, R, Chithiravel, S, Asha, SK
JournalJournal of Polymer Science Part A-Polymer Chemistry
Volume55
Issue6
Pagination951-959
Date PublishedMAR
Type of ArticleArticle
ISSN0887-624X
Keywordscrystal structures, ditopic rylenebisimide, hydrogen bonding, lyotropic liquid crystal, P4VP, Self-assembly, supramolecular crosslink, supramolecular structures
Abstract

Perylenebisimide and naphthalenebisimide (PBIPDP and NBI-PDP) end functionalized with pentadecyl phenol is designed as ditopic hydrogen bonding acceptors to form supramolecular crosslinked network with poly(4-vinyl pyridine) (P4VP). The pristine PBI-PDP has been grown as single crystals from DCM-MeOH (dichloromethane-methanol) mixture at room temperature, which revealed a P21 space group. Noticeably, the pentadecyl alkyl chain shields the aromatic perylene core on both sides resulting in the absence of p-p interaction in single-crystal assembly. The naphthalenebisimide derivative exhibits thermotropic liquid crystalline behavior, while both the molecules exhibits lyotropic liquid crystalline phases in tetrahydrofuran (THF), which were characterized using a combination of differential scanning calorimeter, X-ray diffraction, and polarized light microscopy. The hydrogen-bonded complex of both the rylenebisimides with P4VP preserves the mesomorphic properties in THF. The electron transport mobility measured by space charge limited current measurements reveals a two orders of magnitude increase in the charge transport in the P4VP complex compared to that of the pristine molecule. The average electron mobility obtained is mu(e, avg): 10(-3) cm(2)/Vs for P4VP-PBI compared to mu(e, avg): 10(-5) cm(2)/Vs for pristine PBI derivative. (C) 2017 Wiley Periodicals, Inc.

DOI10.1002/pola.28449
Type of Journal (Indian or Foreign)Foreign
Impact Factor (IF)3.114
Divison category: 
Polymer Science & Engineering

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