Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 37, Pages 20249-20252Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202106734
Keywords
degermanation; interrupted framework; structure solution; three-dimensional electron diffraction; zeolites
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Funding
- Spanish Ministry of Science Innovation and Universities (MICIU, AEI, Spain) [PID2019-105479RB-I00]
- MICIU [FJC2018-035697-I]
- Knut and Alice Wallenberg (KAW) foundation
- Spanish Ministry of Science Innovation and Universities (MICIU) (FEDER, EU)
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HPM-16 is a highly porous germanosilicate zeolite with an interrupted framework, featuring a complex system of fused pores and interconnected layers. Despite its interrupted nature, it exhibits high thermal stability and a unique combination of hydrophilic and hydrophobic regions.
HPM-16 is a highly porous germanosilicate zeolite with an interrupted framework that contains a three-dimensional system of 12+10x10(12)x12+10-membered ring (MR) pores. The 10(12) MR pore in the b direction is a 10 MR pore with long 12 MR stretches forming 30 angstrom long tubular supercages. Along one direction the 10 MR pores are fused, meaning that the separation between adjacent pores consists of a single tetrahedron that is, additionally, connected to only three additional tetrahedra (a Q(3)). These fused pores are thus decorated by T-OH groups along the whole diffusion path, creating a hydrophilic region embedded in an otherwise essentially hydrophobic environment. The structure is built from highly porous 12x12x12 MR uninterrupted layers that are connected to each other through Q(3) producing a second system of 10x10x10 MR pores. This zeolite can be extensively degermanated yielding a material with high thermal stability, despite its interrupted nature.
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