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Formaldehyde Oligomerization on Silicalite: An FTIR and NMR Study |
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| Authors: | FX Llabrés i Xamena C Otero Areán S Spera E Merlo A Zecchina |
| Affiliation: | 1. Departamento de Química, Universidad de las Islas Baleares, Ctra. Valldemossa, Km 7.5, E-07122, Palma de Mallorca, Spain 2. Polimeri Europa, S.p.A., Centro Ricerche Novara “Istituto G. Donegani”, Via G. Fauser 4, I-28100, Novara, Italy 3. Dipartimento di Chimica IFM, Università di Torino, Via P. Guiria, 7, I-10125, Turin, Italy |
| 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 1H-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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