STA-20: An ABC-6 Zeotype Structure Prepared by Co-Templating and Solved via a Hypothetical Structure Database and STEM-ADF Imaging

Alessandro Turrina*, Raquel Garcia, Abigail E. Watts, Heather F. Greer, Jonathan Bradley, Wuzong Zhou, Paul A. Cox, Mervyn D. Shannon, Alvaro Mayoral, John L. Casci, Paul A. Wright

*Awdur cyfatebol y gwaith hwn

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

22 Dyfyniadau (Scopus)

Crynodeb

A microporous silicoaluminophosphate with a novel topology type, STA-20, has been prepared via a dual templating method using hexamethylene bisdiazabicyclooctane (diDABCO-C6) and trimethylamine as cotemplates. Its structure has been solved and confirmed using a multitechnique approach that included the use of a hypothetical zeolite database to obtain a candidate starting structure, followed by scanning transmission electron microscopy with annular dark field imaging and Rietveld refinement. STA-20 is a member of the ABC-6 family of zeotype structures. The structure has trigonal symmetry, P-31c, with a = 13.15497(18) Å and c = 30.5833(4) Å in the calcined form. It has a 12-layer stacking sequence of 6-rings (6Rs), AABAABAACAAC(A), which contains single and double 6R units. In addition to d6r, can, and gme cages, STA-20 possesses the longest cage observed in an ordered ABC-6 material, giving a 3D-connected pore system limited by 8R windows. Models for the location of the templates within cages of the framework were obtained by combining elemental analysis, 13C MAS NMR, computer modeling, and Rietveld refinement.

Iaith wreiddiolSaesneg
Tudalennau (o-i)2180-2190
Nifer y tudalennau11
CyfnodolynChemistry of Materials
Cyfrol29
Rhif cyhoeddi5
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 14 Maw 2017
Cyhoeddwyd yn allanolIe

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