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    Differential Self-Assembly and Tunable Emission of Aromatic Peptide Bola-Amphiphiles Containing Perylene Bisimide in Polar Solvents Including Water

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    Publication date
    2014-07-01
    Author
    Bai, S.
    Debnath, S.
    Javid, Nadeem
    Frederix, P.W.J.M.
    Fleming, S.
    Pappas, C.G.
    Ulijn, R.V.
    Keyword
    Peptide; Emission; Self-assembly; Gels
    Peer-Reviewed
    Yes
    
    Metadata
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    Abstract
    We demonstrate the self-assembly of bola-amphiphile-type conjugates of dipeptides and perylene bisimide (PBI) in water and other polar solvents. Depending on the nature of the peptide used (glycine-tyrosine, GY, or glycine-aspartic acid, GD), the balance between H-bonding and aromatic stacking can be tailored. In aqueous buffer, PBI-[GY]2 forms chiral nanofibers, resulting in the formation of a hydrogel, while for PBI-[GD]2 achiral spherical aggregates are formed, demonstrating that the peptide sequence has a profound effect on the structure formed. In water and a range of other polar solvents, self-assembly of these two PBI-peptides conjugates results in different nanostructures with highly tunable fluorescence performance depending on the peptide sequence employed, e.g., fluorescent emission and quantum yield. Organogels are formed for the PBI-[GD]2 derivative in DMF and DMSO while PBI-[GY]2 gels in DMF. To the best of our knowledge, this is the first successful strategy for using short peptides, specifically, their sequence/structure relationships, to manipulate the PBI nanostructure and consequent optical properties. The combination of controlled self-assembly, varied optical properties, and formation of aqueous and organic gel-phase materials may facilitate the design of devices for various applications related to light harvesting and sensing.
    URI
    http://hdl.handle.net/10454/11429
    Version
    No full-text in the repository
    Citation
    Bai S, Debnath S, Javid N et al (2014) Differential Self-Assembly and Tunable Emission of Aromatic Peptide Bola-Amphiphiles Containing Perylene Bisimide in Polar Solvents Including Water. Langmuir. 30(25): 7576-7584.
    Link to publisher’s version
    http://dx.doi.org/10.1021/la501335e
    Type
    Article
    Collections
    Life Sciences Publications

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