Artículo
Thermodynamic study of functionalized calix[n]arene and resorcinol[n]arene monolayers spreaded at an aqueous pendant drop
Messina, Paula Verónica
; Pieroni, Olga Inés; Vuano, Bruno Mario; Ruso, Juan Manuel; Prieto, Gerardo; Sarmiento, Félix
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Fecha de publicación:
08/2010
Editorial:
Springer
Revista:
Journal Of Inclusion Phenomena And Macrocyclic Chemistry
ISSN:
0923-0750
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The behavior of insoluble calix[n]arene and resorcinol[n]arene derivatives monolayers were studied through the use of a constant surface Langmuir balance based on Axisymmetric Drop Shape Analysis (ADSA). In each case, a stable monolayer was obtained and different transitions (induced for lateral compression) could be identified. Thermodynamic parameters were computed through two dimensional Clausius-Clayperon equations and used to valuate the monolayer stability. A noticeable reduction of thermodynamic parameters occurred at highly tested temperatures (328 and 338 K) for those compounds that had hydrocarbon tails or benzene rings attached to one side of macrocyclic rim. Such fact was related to a monolayer rearrangement where the macrocyclic ring changed from a parallel to a perpendicular orientation. In this orientation the hydrophobic interactions between hydrocarbon chains and benzene rings were maximized. At highly temperature, where vigorous molecular motion existed, those interactions were superior to the stabilization effect through hydrogen bond. © Springer Science+Business Media B.V. 2009.
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Articulos(INQUISUR)
Articulos de INST.DE QUIMICA DEL SUR
Articulos de INST.DE QUIMICA DEL SUR
Citación
Messina, Paula Verónica; Pieroni, Olga Inés; Vuano, Bruno Mario; Ruso, Juan Manuel; Prieto, Gerardo; et al.; Thermodynamic study of functionalized calix[n]arene and resorcinol[n]arene monolayers spreaded at an aqueous pendant drop; Springer; Journal Of Inclusion Phenomena And Macrocyclic Chemistry; 67; 3; 8-2010; 343-352
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