Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/1606
Title: Aligned 1-D nanorods of a pi-gelator exhibit molecular orientation and excitation energy transport different from entangled fiber networks
Authors: Sakakibara, K
Chithra, P
Das, B
Mori, T
Akada, M
Labuta, J
Tsuruoka, T
Maji, S
Furumi, S
Shrestha, L K
Hill, J P
Acharya, S
Ariga, K
Ajayaghosh, A
Keywords: Pi-gelators
Oligo(p-phenylenevinylene)
Molecular orientation
Excited-state properties
Issue Date: 2014
Publisher: American Chemical Society
Citation: Journal of the American Chemical Society 136(24):8548-8551;18 Jun 2014
Abstract: Linear pi-gelators self-assemble into entangled fibers in which the molecules are arranged perpendicular to the fiber long axis. However, orientation of gelator molecules in a direction parallel to the long axes of the one-dimensional (1-D) structures remains challenging. Herein we demonstrate that, at the air-water interface, an oligo(p-phenylenevinylene)-derived pi-gelator forms aligned nanorods of 340 +/- 120 nm length and 34 +/- 5 nm width, in which the gelator molecules are reoriented parallel to the long axis of the rods. The orientation change of the molecules results in distinct excited-state properties upon local photoexcitation, as evidenced by near-field scanning optical microscopy. A detailed understanding of the mechanism by which excitation energy migrates through these 1-D molecular assemblies might help in the design of supramolecular structures with improved charge-transport properties.
URI: http://ir.niist.res.in:8080/jspui/handle/123456789/1606
ISSN: 0002-7863
Appears in Collections:2014

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