Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7690685 | Vibrational Spectroscopy | 2018 | 10 Pages |
Abstract
The crystal structure of L,L-diphenylalanine (C18H20N2O3â
xH2O) is investigated by polarized Raman spectroscopy at temperatures from 303 to 443â¯K over the spectral range 35-3300â¯cmâ1. This dipeptide crystallizes in a tubular arrangement filled by water molecules, maintained by helical Ï-Ï stacking (phenylâ¦phenyl) interactions and intermolecular hydrogen bonds. We investigate the rearrangement of the diphenylalanine backbone and the role of water molecules concerning the previously reported phase transition above 413â¯K. To further support our vibrational results, thermal analysis and DFT calculations are also presented.
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Analytical Chemistry
Authors
J.G. da Silva Filho, F.E.A. Melo, J.A. Jr., G.S. Pinheiro, P.T.C. Freire,