@article { ISI:000231426000052,
	title = {Layered inorganic-organic clay-like nanocomposites rearrange to form silsesquioxanes on acid treatment},
	journal = {Journal Physical Chemistry B},
	volume = {109},
	number = {33},
	year = {2005},
	month = {AUG},
	pages = {16034-16039},
	publisher = {AMER CHEMICAL SOC},
	type = {Article},
	address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA},
	abstract = {<p>The formation of talc-like compounds by the condensation of organotrialkoxy silanes with magnesium hydroxide has been recently reported. These represent layered hybrid nanomaterials that have a layer thickness of around 1 nm, have organic moieties covalently linked to the layer surfaces, and are called {\textquoteleft}{\textquoteleft}organoclays.{\textquoteright}{\textquoteright} We show that such compounds are sensitive to acid treatment. When a phenylclay is treated with hydrochloric acid, magnesium leaches out, destroying the layered structure. The extent to which magnesium is leached out is a function of the time of the acid treatment and the concentration of the acid used. Magnesium leaches out rapidly when the concentration of acid used to treat the phenyl-clay is higher, and the extent of structural magnesium that is leached out is also higher for higher acid concentrations. Removal of the magnesium rearranges the structure of the phenyl-clay to form oligomeric phenylsilsesquioxanes. FTIR and NMR suggest that the silsesquioxanes formed by acid treatment of the phenyl-clay comprise a mixture of ladderlike and cagelike structures.</p>},
	issn = {1520-6106},
	doi = {10.1021/jp0526400},
	author = {Kumaraswamy, Guruswamy and Deshmukh, Yogesh S. and Agrawal, Vikrant V. and Rajmohanan, P.}
}
