Effect of layer charge and dye loading on spectroscopic properties of cationic dye/montmorillonite complexes.

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F10%3A86076243" target="_blank" >RIV/61989100:27360/10:86076243 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Effect of layer charge and dye loading on spectroscopic properties of cationic dye/montmorillonite complexes.
Original language description
Aggregation of methylene blue (MB), crystal violet (CV), nile blue (NB) and rhodamine B (RB) in aqueous solution were studied and percentage distribution of their species (monomer, dimer, trimer and tetramer) in variously concentrated aqueous solutions was calculated. Ca2+-montmorillonite with high layer charge (SAz-1) and reduced charge (RC-SAz(210)) were saturated with the cationic dyes (CD). The prepared cationic dye/montmorillonite complexes were analysed using fluorescence and Vis electron spectroscopy. The Vis electron spectra of fully saturated CD/SAz complexes revealed the presence of higher aggregates, which cause quenching of fluorescence. A huge increase of fluorescence was observed in CD/RC-SAz(210) complexes where mainly monomers and/or dimers of cationic dye are formed. Suppression of dye aggregation in these complexes was due to reduction of montmorillonite layer charge and low dye loading.
Czech name
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Czech description
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Publication year
2010
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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