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Regioselectivity in Pyrene-Templated Polymerization Using MOFs as 1D Porous Scaffolds.

Giacomo Armani-Calligaris1,2, Sergio Carrasco1, Pedro Atienzar3

  • 1Advanced Porous Materials Unit, IMDEA Energy Institute, Avda. Ramón de la Sagra 3, Móstoles, Madrid 28935, Spain.

ACS Applied Materials & Interfaces
|August 19, 2024
PubMed
Summary
This summary is machine-generated.

Metal-organic frameworks (MOFs) enable regioselective polymerization of pyrene within their pores. This templated approach controls polymer structure, yielding highly selective polypyrene regioisomers.

Keywords:
MOFluminescencepolymer compositepolypyreneregioselectivitytemplated polymerization

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Polymer properties are dictated by monomer arrangement.
  • Templated polymerization offers control over polymer structure.
  • Metal-organic frameworks (MOFs) possess tunable, regular porosity.

Purpose of the Study:

  • To investigate the use of MOFs as scaffolds for regioselective polymerization.
  • To demonstrate the controlled oxidative polymerization of pyrene within MOF pores.
  • To elucidate the host-guest interactions governing the polymerization process.

Main Methods:

  • Encapsulation of pyrene within the 1D micropores of MIL-140D MOF.
  • In situ oxidative polymerization of encapsulated pyrene.
  • Characterization using PXRD, TGA, N2 sorption, STEM-EDX, fluorescence, solid-state NMR, FTIR, MALDI-TOF MS, and computational simulations (GCMC, DFT).

Main Results:

  • Successful regioselective oxidative polymerization of pyrene within MIL-140D.
  • Formation of highly selective polypyrene (PPyr) regioisomers.
  • Confirmation of PPyr presence and geometry control within MOF porosity via spectroscopic and microscopic analyses.

Conclusions:

  • MOFs serve as effective scaffolds for controlled polymerization.
  • The regular porosity of MIL-140D directs the regioselective growth of polypyrene.
  • Combined experimental and computational analyses elucidated the host-guest interactions driving the polymerization.