Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 136, Issue 24, Pages 8548-8551Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja504014k
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Funding
- WPI-MANA
- MEXT
- CREST program of JST, Japan
- Department of Atomic Energy, Govt. India
- DST
- CSIR, Govt. India
- Grants-in-Aid for Scientific Research [25288103, 13J09503, 25620068] Funding Source: KAKEN
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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.
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