Abstract
C-alkylpyrogallol[4]arenes (PgCs) have been studied for their ability to form metal-organic nanocapsules (MONCs) through coordination to appropriate metal ions. Here we present the synthesis and characterization of an MnII/MnIII-seamed MONC in addition to its electrochemical and magnetic behavior. This MONC assembles from 24 manganese ions and 6 PgCs, while an additional metal ion is located on the capsule interior, anchored through the introduction of bridging nitrite ions. The latter originate from an in situ redox reaction that occurs during the self-assembly process, thus representing a new route to otherwise unobtainable nanocapsules.
Highlights
C-alkylpyrogallol[4]arenes (PgCs) have been studied for their ability to form metal-organic nanocapsules (MONCs) through coordination to appropriate metal ions
Inspection of the structure reveals that, as is the case for other transition metalbased MONCs34,39,40, 24 manganese ions stitch up the capsule seam, forming eight [Mn3O3] triangular facets
One [Mn3O3] facet, linking through ions (Supplementary Figure 1a). This is the first MONC that has been formed with an odd number of metal ions in the assembly framework, and the fact that the system does not display extreme crystallographic disorder is notable
Summary
C-alkylpyrogallol[4]arenes (PgCs) have been studied for their ability to form metal-organic nanocapsules (MONCs) through coordination to appropriate metal ions. Over the past few decades, there has been great effort invested in the synthesis of molecular analogs of such species, and developing an understanding of their physiological role in nature[7,8,9,10,11,12] These assemblies have been used to investigate structure-property relationships[10,13,14,15,16,17,18,19], and in this regard, clusters containing paramagnetic metal ions have attracted intense interest due to their fascinating magnetic properties[20,21,22,23,24,25]. This assembly is achieved via an in situ redox reaction, the
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