2024-03-29T12:43:23Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/2179232020-12-13T08:44:27Zcom_10261_89com_10261_3com_10261_101com_10261_5col_10261_342col_10261_354
http://hdl.handle.net/10261/217923
10.1039/d0dt00818d
398690
Structural characterization of HPM-7, a more ordered than expected germanosilicate zeolite
Royal Society of Chemistry (UK)
2020
artículo
Lu, Peng
Zhang, Yaping
Mayoral, Álvaro
Gómez-Hortigüela Sainz, Luis
rp06301
Camblor, Miguel Ángel
rp01821
Lu, Peng [0000-0002-9773-3993]
Zhang, Yaping [0000-0001-7362-4381]
Mayoral, Álvaro [0000-0002-5229-2717]
Gómez-Hortigüela Sainz, Luis [0000-0002-4960-8709]
Camblor, Miguel Ángel [0000-0001-9591-3432]
HPM-7
Germanosilicate synthesized
2020
HPM-7, a germanosilicate synthesized using long imidazolium-based dications with two different linkers, is shown to possess the POS topology, although disorder may exist but it is very difficult to discern. First, three simple ordered polymorphs (POS-A to POS-C) with very similar energies and structural motifs could give rise to intergrowths that would be very difficult to recognize by powder X-ray diffraction, according to DIFFaX simulations. Another four structures (POS-D to POS-G) can be derived from POS by changing the orientation of two single four rings within the structure, possibly providing an additional source of disorder. While 3D EDT strongly suggests that HPM-7 basically possesses the POS-A (i.e.POS) topology, a detailed HR-STEM study demonstrates the rare existence of some disorder compatible with the polymorph POS-D. The general avoidance of polymorphs with very similar structural motifs and comparable energies points to a rather specific structure-direction by the organic dications used.
Ministerio de Economía y Competitividad (España)
National Natural Science Foundation of China
ShanghaiTech University
CSIC - Unidad de Recursos de Información Científica para la Investigación (URICI)
Consejo Superior de Investigaciones Científicas (España)
Dalton Transactions
2020
49
7037
7043