Effect of surface and interlayer structure on the fluorescence of rhodamine B-montmorillonite: modeling and experiment

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作者：

P ?Apková，P Maly，M Posp???Il，Z Klika，H Weissmannová，Z Weiss

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摘要：

The surface and interlayer structure of rhodamine B (RhB)–montmorillonite for various guest concentrations has been studied using a combination of X-ray powder diffraction and molecular modeling (molecular mechanics and molecular dynamics) in the Cerius 2 modeling environment. The joint effect of surface and interlayer structure on the fluorescence spectrum has been observed and discussed in relation to the position and orientation of RhB + cations with respect to the silicate layer. Structural analysis showed that the surface and interlayer structures are different as to the arrangement of RhB + cations, and both of them strongly depend on the guest concentration in the intercalation solution and on the method of preparation. The repeated intercalation of montmorillonite by rhodamine B used in the present work allowed obtaining RhB–montmorillonite in the maximum degree of ion exchange for every sample.

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关键词：

Surface structure Interlayer structure Rhodamine B–montmorillonite Molecular modeling Fluorescence of rhodamine B

DOI：

10.1016/j.jcis.2004.03.035

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年份：

2004