Cation Exchange in Dynamic 3D Porous Magnets: Improvement of the Physical Properties

Thais Grancha, Alvaro Acosta, Joan Cano, Jesús Ferrando-Soria*, Beatriz Seoane, Jorge Gascon Sabate, Jorge Pasán, Donatella Armentano, Emilio Pardo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

We report two novel three-dimensional porous coordination polymers (PCPs) of formulas Li4{Mn4[Cu2(Me3mpba)2]3}·68H2O (2) and K4{Mn4[Cu2(Me3mpba)2]3}·69H2O (3) obtained - via alkali cation exchange in a single-crystal to single-crystal process - from the earlier reported anionic manganese(II)-copper(II) PCP of formula Na4{Mn4[Cu2(Me3mpba)2]3}·60H2O (1) [Me3mpba4- = N,N′-2,4,6-trimethyl-1,3-phenylenebis(oxamate)]. This postsynthetic process succeeds where the direct synthesis in solution from the corresponding building blocks fails and affords significantly more robust PCPs with enhanced magnetic properties [long-range 3D magnetic ordering temperatures for the dehydrated phases (1′-3′) of 2.0 (1′), 12.0 (2′), and 20.0 K (3′)]. Changes in the adsorptive properties upon postsynthetic exchange suggest that the nature, electrostatic properties, mobility, and location of the cations within the framework are crucial for the enhanced structural stability. Overall, these results further confirm the potential of postsynthetic methods (including cation exchange) to obtain PCPs with novel or enhanced physical properties while maintaining unaltered their open-framework structures.

Original languageEnglish (US)
Pages (from-to)10834-10840
Number of pages7
JournalInorganic Chemistry
Volume54
Issue number22
DOIs
StatePublished - Oct 22 2015

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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