Urbina AS, Boulos VM, Zeller M, Mendes de Oliveira D, Ben-Amotz D. Binding-Induced Unfolding of 1-Bromopropane in α-Cyclodextrin.
J Phys Chem B 2020;
124:11015-11021. [PMID:
33205979 DOI:
10.1021/acs.jpcb.0c08630]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Raman multivariate curve resolution vibrational spectroscopy and X-ray crystallography are used to quantify changes in the gauche-trans conformational equilibrium of 1-bromopropane (1-BP) upon binding to α-cyclodextrin (α-CD). Both conformers of 1-BP are found to bind to α-CD, although binding favors the unfolded trans conformation. Temperature-dependent measurements of the binding-induced change in the 1-BP conformation equilibrium constant indicate that the trans conformer is both enthalpically and entropically stabilized in the host cavity.
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