STUDIES OF LAYERED AND CHANNEL COMPLEXES USING COMBINED THERMOGRAVIMETRY AND MASS-SPECTROMETRY

The rate of removal and uptake of guests into layered and porous mater ials is important in many areas of materials chemistry. Here we report on the use of atmospheric thermogravimetry linked to a mass spectrome ter (TC-MS) to investigate the thermal characteristics of three differ ent solids. We show that (i) the desorption of cyclohexylamine from th e surface of a pillared acid activated smectite clay occurs in two sta ges, indicating two possible acidic binding sites, (ii) TG-MS is an ex tremely sensitive technique for probing progressive anion exchange of lithium aluminium layered double hydroxides, (iii) on heating, the per hydrate 4Na(2)SO(4) . NH4Cl . 2H(2)O(2) releases H2O2 intact.