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Artículo

Host-guest molecular interactions in vanillin/Hylon VII inclusion complexes

Rodríguez, Silvio DavidIcon ; Bernik, Delia LeticiaIcon
Fecha de publicación: 03/2013
Editorial: Soc Applied Spectroscopy
Revista: Applied Spectroscopy
ISSN: 0003-7028
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Química Analítica

Resumen

The interaction of 4-hydroxy-3-methoxybenzaldehyde (vanillin) and Hylon VII due to the formation of an inclusion complex is studied using Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), and circular dichroism (CD). The results confirm the close interaction among the different functional groups of vanillin and its host. In addition, a second case study was carried out with an amylose 1 from a different source (100% amylose [APT III]). ). As a result, remarkable differences were found in the vanillin complexation capability of this amylose, which is only shown in solution by circular dichroism spectroscopy studies through a clear Cotton effect. This finding confirms the value of using CD studies, which allow finding that, depending of the amylose source, inclusion complexes can be found only in solution, or both in solution and the coexisting precipitates, when this is shown using other techniques, such as X-ray diffraction (XRD) or differential scanning calorimetry (DSC). Moreover, solubility assays and complexation of both starches with iodine and subsequent absorption spectroscopy studies gives more information regarding the possible source of the starch encapsula- tion capability. Thus, Hylon VII shows higher capacity as vanillin encapsulant than APT III, showing the formation of inclusion complexes both in solution and solid phase, whereas APT III complexes are only perceivable in solution.
Palabras clave: Inclusion Complex , Amylose , Ftir , Circular Dichroism , Differential Scanning Calorimetry
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/7891
DOI: http://dx.doi.org/10.1366/12-06981
URL: http://asp.sagepub.com/content/67/8/884.abstract
Colecciones
Articulos(INQUIMAE)
Articulos de INST.D/QUIM FIS D/L MATERIALES MEDIOAMB Y ENERGIA
Articulos(OCA CIUDAD UNIVERSITARIA)
Articulos de OFICINA DE COORDINACION ADMINISTRATIVA CIUDAD UNIVERSITARIA
Citación
Rodríguez, Silvio David; Bernik, Delia Leticia; Host-guest molecular interactions in vanillin/Hylon VII inclusion complexes; Soc Applied Spectroscopy; Applied Spectroscopy; 67; 8; 3-2013; 884-891
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