Abstract:
A joint experimental and theoretical study has been carried out on the amylose-vanillin complex, demonstrating its formation by X-ray diffraction as well as UV/visible and circular dichroism spectroscopic techniques. Theoretical simulations substantiate these experimental data and the variations of properties upon complexation by evidencing the stability of the inclusion of vanillin in the helical cavity as well as by explaining the related changes of the linear (chiro-)optical properties. In particular, the circular dichroism (CD) signature of the vanillin inclusion complex results from a geometrical distortion induced by the complexation with the surrounding amylose helix. The use of the ONIOM technique mixing B3LYP and PM6 levels of approximation to include the interactions between different layers (together with the IEFPCM model to describe the solvent) appears to be a satisfactory methodology to simulate both the UV and CD spectra for these compounds. © 2011 American Chemical Society.
Registro:
Documento: |
Artículo
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Título: | Amylose-vanillin complexation assessed by a joint experimental and theoretical analysis |
Autor: | Rodríguez, S.D.; Bernik, D.L.; Méreau, R.; Castet, F.; Champagne, B.; Botek, E. |
Filiación: | Instituto de Química-Física de Materiales, Medio Ambiente y Energía, Universidad de Buenos Aires, Pabellón II, Ciudad Universitaria, C1428EGA Buenos Aires, Argentina Institut des Sciences Moléculaires, UMR 5255 CNRS, Université de Bordeaux, Cours de la Libération, 351, F-33405 Talence CEDEX, France Laboratoire de Chimie Théorique, Facultés Universitaires Notre-Dame de la Paix, rue de Bruxelles, 61, B-5000 Namur, Belgium
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Palabras clave: | Dichroism; X ray diffraction; CD spectra; Different layers; Geometrical distortion; Inclusion complex; Spectroscopic technique; Theoretical simulation; Theoretical study; Cyclodextrins |
Año: | 2011
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Volumen: | 115
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Número: | 47
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Página de inicio: | 23315
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Página de fin: | 23322
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DOI: |
http://dx.doi.org/10.1021/jp208328n |
Título revista: | Journal of Physical Chemistry C
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Título revista abreviado: | J. Phys. Chem. C
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ISSN: | 19327447
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19327447_v115_n47_p23315_Rodriguez |
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Citas:
---------- APA ----------
Rodríguez, S.D., Bernik, D.L., Méreau, R., Castet, F., Champagne, B. & Botek, E.
(2011)
. Amylose-vanillin complexation assessed by a joint experimental and theoretical analysis. Journal of Physical Chemistry C, 115(47), 23315-23322.
http://dx.doi.org/10.1021/jp208328n---------- CHICAGO ----------
Rodríguez, S.D., Bernik, D.L., Méreau, R., Castet, F., Champagne, B., Botek, E.
"Amylose-vanillin complexation assessed by a joint experimental and theoretical analysis"
. Journal of Physical Chemistry C 115, no. 47
(2011) : 23315-23322.
http://dx.doi.org/10.1021/jp208328n---------- MLA ----------
Rodríguez, S.D., Bernik, D.L., Méreau, R., Castet, F., Champagne, B., Botek, E.
"Amylose-vanillin complexation assessed by a joint experimental and theoretical analysis"
. Journal of Physical Chemistry C, vol. 115, no. 47, 2011, pp. 23315-23322.
http://dx.doi.org/10.1021/jp208328n---------- VANCOUVER ----------
Rodríguez, S.D., Bernik, D.L., Méreau, R., Castet, F., Champagne, B., Botek, E. Amylose-vanillin complexation assessed by a joint experimental and theoretical analysis. J. Phys. Chem. C. 2011;115(47):23315-23322.
http://dx.doi.org/10.1021/jp208328n