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    Tunable supramolecular gel properties by varying thermal history

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    Javid_Chemistry_A_European_Journal (608.3Kb)
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    Publication date
    2019-06-12
    Author
    Debnath, S.
    Roy, S.
    Abul-Haija, Y.M.
    Frederix, P.W.J.M.
    Ramalhete, S.M.
    Hirst, A.R.
    Javid, Nadeem
    Hunt, N.T.
    Kelly, S.M.
    Angulo, J.
    Khimyak, Y.Z.
    Ulijn, R.V.
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    Keyword
    Hydrogels
    Peptide amphiphiles
    Self-assembly
    Supramolecular chemistry
    Thermal history
    Rights
    © 2019 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim. This is the peer reviewed version of the following article: Debnath S, Roy S, Abul-Haija YM et al (2019) Tunable supramolecular gel properties by varying thermal history. Chemistry: A European Journal. 25(33): 7881-7887, which has been published in final form at https://doi.org/10.1002/chem.201806281. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
    Peer-Reviewed
    Yes
    
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    Abstract
    The possibility of using differential pre‐heating prior to supramolecular gelation to control the balance between hydrogen‐bonding and aromatic stacking interactions in supramolecular gels and obtain consequent systematic regulation of structure and properties is demonstrated. Using a model aromatic peptide amphiphile, Fmoc‐tyrosyl‐leucine (Fmoc‐YL) and a combination of fluorescence, infrared, circular dichroism and NMR spectroscopy, it is shown that the balance of these interactions can be adjusted by temporary exposure to elevated temperatures in the range 313–365 K, followed by supramolecular locking in the gel state by cooling to room temperature. Distinct regimes can be identified regarding the balance between H‐bonding and aromatic stacking interactions, with a transition point at 333 K. Consequently, gels can be obtained with customizable properties, including supramolecular chirality and gel stiffness. The differential supramolecular structures also result in changes in proteolytic stability, highlighting the possibility of obtaining a range of supramolecular architectures from a single molecular structure by simply controlling the pre‐assembly temperature.
    URI
    http://hdl.handle.net/10454/17205
    Version
    Accepted manuscript
    Citation
    Debnath S, Roy S, Abul-Haija YM et al (2019) Tunable supramolecular gel properties by varying thermal history. Chemistry: A European Journal. 25(33): 7881-7887.
    Link to publisher’s version
    https://doi.org/10.1002/chem.201806281
    Type
    Article
    Collections
    Life Sciences Publications

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