Porous metal-organic alloys based on soluble coordination cages.

Chemical Science
Alexandra M AntonioEric D Bloch

Abstract

Diverse strategies for the preparation of mixed-metal three-dimensional porous solids abound, although many of them lend themselves only moderate levels of tunability. Herein, we report the design and synthesis of surface functionalized permanently microporous coordination cages and their use in the isolation of mixed metal solids. Judicious alkoxide-based ligand functionalization was utilized to tune the solubility of starting copper(ii)-based cages and their resulting compatibility with the mixed-cage approach described here. We further prepared a family of isostructural molybdenum(ii) cages for a subset of the ligands. The preparation of mixed-metal cage solids proceeds under facile conditions where solutions of parent cages are mixed and product phases isolated. A suite of spectroscopic and characterization tools confirm the starting cages are intact in the amorphous product. Finally, we show that utilization of precise ligand functional groups can be used to prepare mixed cage solids that can be easily and cleanly separated into their constituent components through simple solvent washing or solvent extraction techniques.

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Citations

Aug 3, 2021·Journal of the American Chemical Society·Bao-Nguyen T NguyenJonathan R Nitschke
Sep 10, 2021·Journal of the American Chemical Society·Aeri J GosselinEric D Bloch

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Methods Mentioned

BETA
infrared spectroscopy
NMR
differential scanning calorimetry

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