751. Hydrothermal synthesis of new pure beryllophosphate molecular sieve phases from concentrated amines
- Author
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Shi Zhan, Xin Xu, Haoyu Zhang, Yaming Zhou, Minqin Chen, Xianhui Bu, and Dongyuan Zhao
- Subjects
Gmelinite ,General Chemical Engineering ,General Chemistry ,Crystal structure ,Molecular sieve ,chemistry.chemical_compound ,Crystallography ,chemistry ,Pyridine ,Materials Chemistry ,Hydrothermal synthesis ,Organic chemistry ,Hybrid material ,Gismondine ,Zeolite - Abstract
A few new pure beryllophosphate molecular sieves have been hydrothermally synthesized by using concentrated amines such as triethylene tetramine, polyethylene polyamine, piperazine, and pyridine as structure-directing agents. The structures of these compounds were characterized by single-crystal X-ray diffraction. Their structures are similar to the zeolite gmelinite, gismondine, and ABW frameworks, named BePO4−GME, BePO4−GIS, and BePO4−ABW, respectively. BePO4−GME is the first instance of phosphate with GME topology. The organic template was found in the 12-membered ring channels running along [001]; the thermal analysis indicates that the inorganic framework collapses above 400 °C after the removal of the template. BePO4−GIS is a new beryllophosphate, which has three-dimensional, intersecting 8-membered ring channels along the crystallographic [001], [010], and [111] directions. In the concentrated amines system these resulting compounds have similar structural characterizations: Their frameworks that ...