The effect of temperature and solvation on the ultrafast dynamics of n-methylacetamide

Hunt, N.T. and Wynne, K. (2006) The effect of temperature and solvation on the ultrafast dynamics of n-methylacetamide. Chemical Physics Letters, 431. pp. 155-159. ISSN 0009-2614 (https://doi.org/10.1016/j.cplett.2006.09.084)

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Abstract

The ultrafast dynamics of N-methylacetamide (NMA), a peptide-linkage model compound, are reported for the first time as a function of temperature and dilution. The rotational-diffusive timescale of NMA was observed to behave in a manner inconsistent with established hydrodynamic theory for simple liquids, exhibiting sharp decreases at elevated temperatures and low concentrations. These were associated with non-stoichiometric changes in far-infrared and terahertz Raman transition strengths. The data is consistent with a model in which neat NMA forms hydrogen bonded aggregates, featuring cooperative effects upon the polarizability and dipole moment that are disrupted by increased temperature or decreased NMA mole fraction.

  • Item type:Article
    ID code:10169
    Dates:
    Date
    Event
    2006
    Published
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Strathprints Administrator
    Date deposited:11 Oct 2011 09:42
    Last modified:08 Apr 2024 16:42
    URI:https://strathprints.strath.ac.uk/id/eprint/10169
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