Triethylamine template location within CoAlPO-34 type materials by high-resolution powder diffraction and single-crystal diffraction techniques
Abstract
A detailed structural study into the effects of substituted cobalt concentration within the aluminophosphate material CoAlPO-34 on the uptake of the template within the framework structure has been performed. The structure is classed as “small pore”, with an aperture of ca 3.8Å, and has a structure analogous to that of the naturally occurring mineral Chabazite. Both high-resolution powder diffraction (HRPD) and single-crystal diffraction (SCD) techniques in the form of micro-crystal diffraction facilities at the Daresbury Synchrotron Source have made it possible to collect high-quality diffraction data for the range of crystalline CoAlPO-34 samples. The results showed the template location and ordering within the structure at the various substituted cobalt concentrations up to the Co:T site ratio of 1:6 expected to produce two template molecules per cage. The location of the single organic template molecule within the microporous framework is clearly shown.
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