title: The Organic Secondary Building Unit: Strong Intermolecular π Interactions Define Topology in MIT-25, a Mesoporous MOF with Proton-Replete Channels.
abstract: The structure-directing role of the inorganic secondary building unit (SBU) is key for determining the topology of metal-organic frameworks (MOFs). Here we show that organic building units relying on strong π interactions that are energetically competitive with the formation of common inorganic SBUs can also play a role in defining the topology. We demonstrate the importance of the organic SBU in the formation of Mg2H6(H3O)(TTFTB)3(MIT-25), a mesoporous MOF with the new ssp topology. A delocalized electronic hole is critical in the stabilization of the TTF triad organic SBUs and exemplifies a design principle for future MOF synthesis.
authors.affiliation: Department of Chemistry, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States.
authors.forename: Sarah S
authors.initials: SS
authors.lastname: Park
authors.affiliation: Department of Chemistry, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States.
authors.forename: Christopher H
authors.identifier: 0000-0002-7132-768X
authors.initials: CH
authors.lastname: Hendon
authors.affiliation: School of Chemistry and the Photon Science Institute, The University of Manchester , Manchester M13 9PL, United Kingdom.
authors.forename: Alistair J
authors.identifier: 0000-0002-4437-9791
authors.initials: AJ
authors.lastname: Fielding
authors.affiliation: Department of Materials, Imperial College London , London SW7 2AZ, United Kingdom.|Department of Materials Science and Engineering, Yonsei University , Seoul 03722, South Korea.
authors.forename: Aron
authors.identifier: 0000-0001-5460-7033
authors.initials: A
authors.lastname: Walsh
authors.affiliation: School of Molecular Sciences, Arizona State University , Tempe, Arizona 85287, United States.
authors.forename: Michael
authors.initials: M
authors.lastname: O'Keeffe
authors.affiliation: Department of Chemistry, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States.
authors.forename: Mircea
authors.identifier: 0000-0002-1262-1264
authors.initials: M
authors.lastname: Dincă