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Raman spectroscopic studies of aqueous tetramethylammonium silicate solutions
Author(s) -
Dutta P. K.,
Shieh D. C.
Publication year - 1985
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250160505
Subject(s) - tetramethylammonium hydroxide , tetramethylammonium , raman spectroscopy , aluminosilicate , silicate , hydroxide , chemistry , inorganic chemistry , zeolite , alkali metal , aqueous solution , ion , organic chemistry , catalysis , physics , optics
The influence of cations on aluminosilicate zeolite formation is well recognized. This Raman study showed that on a molecular level, there is a significant difference in the type of silicate species that are solubilized by tetramethylammonium hydroxide and sodium hydroxide at certain hydroxide ion concentrations. A cubic, cage‐like silicate species is formed in 1.0–1.4 M tetramethylammonium hydroxide, whereas no such species was formed in alkali metal hydroxide at any concentration. Band assignments for the cubic species [(CH 3 ) 4 N] 8 Si 8 O 20 are made from the Raman and infrared spectroscopic data. Elucidation of such structural effects by Raman spectroscopy can help explain the unique influence of the cation on zeolite formation.