Site-Specific Metal Chelation Facilitates the Unveiling of Hidden Coordination Sites in an Fe II /Fe III -Seamed Pyrogallol[4]arene Nanocapsule

Under suitable conditions, C-alkylpyrogallol[4]arenes (PgCs) arrange into spherical metal-organic nanocapsules (MONCs) upon coordination to appropriate metal ions. Herein we present the synthesis and structural characterization of a novel Fe /Fe -seamed MONC, as well as studies related to its electr...

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Veröffentlicht in:Journal of the American Chemical Society 2018-11, Vol.140 (46), p.15611-15615
Hauptverfasser: Rathnayake, Asanka S, Fraser, Hector W L, Brechin, Euan K, Dalgarno, Scott J, Baumeister, Jakob E, White, Joshua, Rungthanaphatsophon, Pokpong, Walensky, Justin R, Kelley, Steven P, Barnes, Charles L, Atwood, Jerry L
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Sprache:eng
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Zusammenfassung:Under suitable conditions, C-alkylpyrogallol[4]arenes (PgCs) arrange into spherical metal-organic nanocapsules (MONCs) upon coordination to appropriate metal ions. Herein we present the synthesis and structural characterization of a novel Fe /Fe -seamed MONC, as well as studies related to its electrochemical and magnetic behaviors. Unlike other MONCs that are assembled through 24 metal ions, this nanocapsule comprises 32 Fe ions, uncovering 8 additional coordination sites situated between the constituent PgC subunits. The Fe ions are likely formed by the reducing ability of DMF used in the synthesis, representing a novel synthetic route toward polynuclear mixed-valence MONCs.
ISSN:0002-7863
1520-5126
DOI:10.1021/jacs.8b10186