A novel series of isoreticular metal organic frameworks: realizing metastable structures by liquid phase epitaxy

  • Autor:

    Liu, J. / Lukose, B. / Shekhah, O. / Arslan, H. / Weidler, P. / Gliemann, H. / Bräse, St. / Grosjean, S. / Godt, A. / Feng, X. / Müllen, K. / Magdau, I. / Heine, T. / Wöll, C. (2012)
  • Quelle:

    Scientific Reports, 2 (2012), 1-5
  • Datum: 2012

  • Liu, J. / Lukose, B. / Shekhah, O. / Arslan, H. / Weidler, P. / Gliemann, H. / Bräse, St. / Grosjean, S. / Godt, A. / Feng, X. / Müllen, K. / Magdau, I. / Heine, T. / Wöll, C. (2012): „A novel series of isoreticular metal organic frameworks: realizing metastable structures by liquid phase epitaxyof “. In: Scientific Reports, 2 (2012), 1-5

Abstract

A novel class of metal organic frameworks (MOFs) has been synthesized from Cu-acetate and dicarboxylic acids using liquid phase epitaxy. The SURMOF-2 isoreticular series exhibits P4 symmetry, for the longest linker a channel-size of 3 × 3 nm2 is obtained, one of the largest values reported for any MOF so far. High quality, ab-initio electronic structure calculations confirm the stability of a regular packing of (Cu++)2- carboxylate paddle-wheel planes with P4 symmetry and reveal, that the SURMOF-2 structures are in fact metastable, with a fairly large activation barrier for the transition to the bulk MOF-2 structures exhibiting a lower, twofold (P2 or C2) symmetry. The theoretical calculations also allow identifying the mechanism for the low-temperature epitaxial growth process and to explain, why a synthesis of this highly interesting, new class of high-symmetry, metastable MOFs is not possible using the conventional solvothermal process.

 

 

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