Interrupted silicogermanate with 10-ring channels: synthesis and structure determination by combining rotation electron diffraction and powder X-ray diffraction

Wang, Yilin; Wang, Yunchen; Su, Jie; Song, Xiaowei; Wan, Wei; Yu, Jihong

doi:10.1039/c7qi00309a

Cited by 4 publications

(2 citation statements)

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“…Many complex novel porous crystalline framework structures have been solved from RED data. These include zeolites, − zeolite-related materials, silicogermanate open frameworks, , metal–organic frameworks − and covalent–organic frameworks . In this Article, we present the structure solution of the zeolitic layered fluoroaluminophosphate structure EMM-9 using the RED method.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Structure of a Layered Fluoroaluminophosphate and Its Transformation to a Three-Dimensional Zeotype Framework

Guo

Afeworki²,

Cao³

et al. 2018

Inorg. Chem.

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Two-dimensional zeolitic materials have drawn increasing attention because of their structural diversity, high accessible surface areas, and potential as precursors to form novel three-dimensional (3D) structures. Here we report a new layered fluoroaluminophosphate, denoted as EMM-9 (ExxonMobil Material #9), synthesized in the same synthesis system as that for a previously reported 3D framework structure EMM-8 (framework-type code: SFO) using an F medium and 4-(dimethylamino)pyridine (DMAP) as the organic structure-directing agent. The structure of EMM-9 was solved from rotation electron diffraction data and refined against synchrotron powder X-ray diffraction data. The fluoroaluminophosphate layer of EMM-9 is composed of sti composite building units. The DMAP cations are located between the layers. π-π interactions between the DMAP cations and hydrogen bonding between the DMAP cations and layers were identified. The layered EMM-9 structure is closely related to the 3D framework structure of EMM-8 and can be transformed to EMM-8 by calcination.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Structure of a Layered Fluoroaluminophosphate and Its Transformation to a Three-Dimensional Zeotype Framework

Guo

Afeworki²,

Cao³

et al. 2018

Inorg. Chem.

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“…Second, many are “interrupted frameworks” rather than true zeolites. Such frameworks contain some tetrahedra that do not share all of their vertices, which can decrease robustness ( 5 , 6 ), and contain dangling OH groups that typically reduce the pore space ( 7 ). The only reported zeolites with multidimensional extra-large pores (- ITV , - CLO , - IFU , - IRY , and - IFT ) are all interrupted germanosilicates or gallium phosphates with intrinsically low stability ( 8 ).…”

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confidence: 99%

A stable aluminosilicate zeolite with intersecting three-dimensional extra-large pores

Lin

Gao

Lin

et al. 2021

Science

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Extra-large and intersecting pores Thermally stable zeolites with large pores, such as zeolite Y with 12-membered rings, are used for converting large molecules from petroleum into smaller, more useful hydrocarbons. Lin et al . report the synthesis of ZEO-1, a thermally stable zeolite with extra-large, 16-membered rings. The use of tricyclohexylmethylphosphonium as an organic structure–directing agent created a zeolite with a fully interconnected multidimensional framework and a very high specific surface area. —PDS

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Bipyridine-triggered modulation of structure and properties of zinc-diphosphonates: coordination role vs. template rule

Han

et al. 2018

Dalton Trans.

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Two zinc-diphosphonates driven by 4,4'-bipyridine (4,4'-bipy), [Zn(HEDP)(4,4'-bipy)]·4.5(HO) (1) and (H-4,4'-bipy)·[Zn(HEDP)(HEDP)(HO)]·1.5(HO) (2), were solvothermally prepared (HEDP = CHC(OH)(PO), 1-hydroxyethylidenediphosphonate). Compound 1 features a layered structure with the Zn-HEDP chains as supramolecular units and 4,4'-bipy as interchain linkers. Compound 2 possesses a Zn-HEDP layer with protonated 4,4'-bipy as template. The structure differences between the two compounds are mainly ascribed to the distinct role of 4,4'-bipy in the process of in situ assembly. In compound 1, the 4,4'-bipy moiety acts as coordinative unit to participate in the formation of the resulting architecture. However, in compound 2, the protonated 4,4'-bipy serves as template to direct the formation of the final structure. The luminescence and proton conduction of the two compounds were investigated. Compounds 1 and 2 exhibit intense blue fluorescence; compound 2 has a proton conductivity of 2.61 × 10 S cm at 100% relative humidity and 70 °C.

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Interrupted silicogermanate with 10-ring channels: synthesis and structure determination by combining rotation electron diffraction and powder X-ray diffraction

Abstract: Structure determination of silicogermanate with sti layers pillared by D4R/Ge7 units by rotation electron diffraction and powder X-ray diffraction.

Cited by 4 publications

References 50 publications

Synthesis and Structure of a Layered Fluoroaluminophosphate and Its Transformation to a Three-Dimensional Zeotype Framework

Synthesis and Structure of a Layered Fluoroaluminophosphate and Its Transformation to a Three-Dimensional Zeotype Framework

A stable aluminosilicate zeolite with intersecting three-dimensional extra-large pores

Bipyridine-triggered modulation of structure and properties of zinc-diphosphonates: coordination role vs. template rule

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