Upon adsorption of formaldehyde onto silicalite, hydrogen-bonded adducts are formed between the ( slightly acidic) SiOH groups of the purely siliceous zeolite and formaldehyde, as seen by using both FTIR and H-1-NMR spectroscopies. These species then evolve to form polymerization products of the type -(CH2O)(n)-. On the contrary, when silicalite is contacted with trioxane hydrogen-bonded adducts are formed, but no polymerization ensues.
Formaldehyde oligomerization on silicalite: an FTIR and NMR study
ZECCHINA, Adriano
2004-01-01
Abstract
Upon adsorption of formaldehyde onto silicalite, hydrogen-bonded adducts are formed between the ( slightly acidic) SiOH groups of the purely siliceous zeolite and formaldehyde, as seen by using both FTIR and H-1-NMR spectroscopies. These species then evolve to form polymerization products of the type -(CH2O)(n)-. On the contrary, when silicalite is contacted with trioxane hydrogen-bonded adducts are formed, but no polymerization ensues.
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