Journal
LANGMUIR
Volume 30, Issue 21, Pages 6030-6037Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la500497g
Keywords
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Funding
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan under the Green Photonics Project at NAIST
- [25248019]
- Grants-in-Aid for Scientific Research [25248019, 25107720, 14F04911] Funding Source: KAKEN
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The supramolecular helicity in the self-assembled nanostructures of two perylene bisimide bichromophoric systems could be controlled by varying the preparatory methods. The self-assembly of the compounds under different conditions was investigated in detail by using absorption, fluorescence, CD, FTIR, XRD, TEM, and SEM techniques. These studies reveal that the heating cooling method results in aggregates with ordered molecular packing and enhanced optical chirality. Ultrasonication leads to molecular aggregates with less ordered packing wherein the supramolecular chirality was reversed relative to the sample prepared via a heating cooling method. This heating cooling method proved to be superior in terms of nanofiber synthesis, yielding fibers with extended length and a prominent helical twist. At higher concentration, both compounds exhibited a gelation property in benzonitrile. The tunable chiroptical properties in these supramolecular systems make them potential candidates for applications in the field of optical and electronic device fabrication based on organic nanostructures.
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