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A range of MCM-41 materials have been prepared and characterised employing diffuse reflectance FTIR spectroscopy (DRIFTS) to investigate fundamental and combination frequencies of the OH groups in amorphous and crystalline aluminosilicates. Comparative characterisation of mesoporous materials shows that SiOH groups in Al-MCM-41 are acidic, unlike those in Si-MCM-41. At the same time, no indication...
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