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

Abstract

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.

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Publication details

The article was received on 04 Nov 2018, accepted on 23 Jan 2019 and first published on 24 Jan 2019


Article type: Paper
DOI: 10.1039/C8TA10610J
Citation: J. Mater. Chem. A, 2019, Accepted Manuscript

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

    R. Prasad, S. Seidner, D. B. Cordes, M. Lozinska, D. Dawson, M. Thompson, T. Düren, K. Chakarova, M. Mihaylov, K. Hadjiivanov, F. Hoffmann, A. Slawin, S. E. Ashbrook, M. Clarke and P. Wright, J. Mater. Chem. A, 2019, Accepted Manuscript , DOI: 10.1039/C8TA10610J

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