STA-27, a porous Lewis acidic scandium MOF with an unexpected topology type prepared with 2,3,5,6-tetrakis(4-carboxyphenyl)pyrazine

Ram Prasad, Sarah Seidner, David B. Cordes, Magdalena Lozinska, Daniel Dawson, Megan Thompson, Tina Düren, Kristina Chakarova, Mihail Mihaylov, K. Hadjiivanov, Frank Hoffmann, Alexandra M. Z. Slawin, Sharon E. Ashbrook, Matt Clarke, Paul Wright

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22 Citations (Scopus)
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A porous scandium MOF denoted STA-27 (St Andrews Porous Material-27) has been synthesised solvothermally using the 2,3,5,6-tetrakis(4-carboxyphenyl)pyrazine anion (TCPP4-) as the tetratopic carboxylate linker. STA-27 possesses a unique scandium-based 1D rod secondary building unit (SBU) comprising corner-sharing scandium Sc2O11 dimers connected via carboxylate groups from the linker. After activation under mild conditions STA-27 is an active Lewis acidic catalyst, while heating at elevated temperatures results in rupturing of the Sc-O-Sc linkages and a phase transition to a different topological type. Under similar synthesis conditions the smaller Al3+ and Ga3+ cations give isostructural MOFs with a different, previously reported, topology type based on chains of corner-sharing MO4(OH)2 octahedra: the Al-form possesses attractive properties for CO2 adsorption.
Original languageEnglish
Pages (from-to)5685-5701
JournalJournal of Materials Chemistry
Issue number10
Early online date24 Jan 2019
Publication statusPublished - 14 Mar 2019


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