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Crystallogenesis and Mineralogy
Saint Petersburg, Russia
1-5 October 2007
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Conferences & Meetings 2nd International Conference "Crystallogenesis and Mineralogy"
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Effects of montmorillonite mineral modification on the structure of its nanocomposites with benzophenone

RMS-DPI code:  2007-1-96-0
Scientific session:  Session 4. Bio- and organogenetic minerals and materials
Author listing:  Melnyk V., Bezrodna T., Puchkovska G., Chashechnikova I., Shaydyuk E., Tolochko A., Hauser A.
Principal author:  Melnyk Volodymyr Ivanovich
Language:  Russian
Abstract - Summary 
(short description):
Montmorillonite particles were modified with different surfactants such as dioctadecyldimethylammonium chloride (MMT-DODM), octadecylbenzyldimethylammonium chloride (MMT-OBDM) and cetyltrimethylammonium bromide (MMT CTAB). Owing to the presence of benzyl radical in the OBDM molecule, in the nanocomposite systems under study MMT OBDM clay mineral is characterized by stronger affinity to the organic media (benzophenone) as compared to MMT-DODM и MMT CTAB clays. In the heterosystems with benzophenone there exists both the crystalline and amorphous phase, the last being formed in the near-surface layers of nanoparticles in the form of a thin shell due to the disordering effect of inorganic particles on the adjacent benzophenone molecules. An increase in chemical affinity between the organoclay surface and benzophenone molecules (a nanocomposite with MMT-OBDM clay) results in acceleration of relaxation processes in the amorphous benzophenone layers and more rapid phosphorescence decay. The differences in the heterogeneous systems are explained by the different functional groups of modifier molecules, which are responsible for the interactions of benzophenone with the organoclay surfaces.
 
RMS-DPI code:  2007-1-96-0
Proceeedings volume 
in the RMS catalogue:
 
Crystallogenesis and Mineralogy
Pages:  196-198
File of proceedings 
(PDF): 
 256 K
Status:  printed
Recieved:  07/05/2007
Revised:  07/05/2007
Accepted:  23/05/2007
Published on-line:  06/01/2008
Permanent address of publication:  http://www.minsoc.ru/2007-1-96-0/
Contact author(s):  Melnyk, Volodymyr Ivanovich
 
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