Inside polyMOFs: layered structures in polymer-based metal-organic frameworks

Kyle C. Bentz, Karthikeyan Gnanasekaran, Jake B. Bailey, Sergio Ayala, F. Akif Tezcan, Nathan C. Gianneschi*, Seth M. Cohen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

In this report, we explore the internal structural features of polyMOFs consisting of equal mass ratios of metal-coordinating poly(benzenedicarboxylic acid) blocks and non-coordinating poly(ethylene glycol) (PEG) blocks. The studies reveal alternating lamellae of metal-rich, crystalline regions and metal-deficient non-crystalline polymer, which span the length of hundreds of nanometers. Polymers consisting of random PEG blocks, PEG end-blocks, or non-coordinating poly(cyclooctadiene) (COD) show similar alternation of metal-rich and metal-deficient regions, indicating a universal self-assembly mechanism. A variety of techniques were employed to interrogate the internal structure of the polyMOFs, including transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and small-angle synchrotron X-ray scattering (SAXS). Independent of the copolymer architecture or composition, the internal structure of the polyMOF crystals showed similar lamellar self-assembly at single-nanometer length scales.

Original languageEnglish (US)
Pages (from-to)10523-10528
Number of pages6
JournalChemical Science
Volume11
Issue number38
DOIs
StatePublished - Oct 14 2020

ASJC Scopus subject areas

  • Chemistry(all)

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