Liquid crystalline supramolecular crosslinked polymer complexes of ditopic rylenebisimides and P4VP
Title | Liquid crystalline supramolecular crosslinked polymer complexes of ditopic rylenebisimides and P4VP |
Publication Type | Journal Article |
Year of Publication | 2017 |
Authors | Saibal, B, Narayan, R, Chithiravel, S, Asha, SK |
Journal | Journal of Polymer Science Part A-Polymer Chemistry |
Volume | 55 |
Issue | 6 |
Pagination | 951-959 |
Date Published | MAR |
Type of Article | Article |
ISSN | 0887-624X |
Keywords | crystal 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. |
DOI | 10.1002/pola.28449 |
Type of Journal (Indian or Foreign) | Foreign |
Impact Factor (IF) | 3.114 |
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