Materials Science

Etching and Polymerization Reactions of Alkoxythiophenes in HKUST-1: Choosing Between Filled and Core-Shell MOF/Polymer Composite Structures

Authors

Abstract

In an earlier report, we found that neat 3,4-ethylenedioxythiophene (EDOT) directly reacts with HKUST-1 to form a core-shell composite in which the HKUST-1 surface is coated with conjugated polymer, while unsubstituted thiophenes formed a filled composite where polythiophene is contained in the MOF's pores. In this work, we found that EDOT and 3-methoxythiophene (3MOT), which react in the neat form to form core-shell composites, can be loaded into HKUST-1 pores without reaction when dissolved in hexanes. To a lesser extent, 3-hexyloxythiophene (3HOT) can be loaded in the same way. These hexane-loaded composites can then be heated, resulting in the formation of a 'filled' composite. This finding allows us to choose to prepare either a core-shell or a filled composite by selecting reaction conditions. The process of heating with alkoxythiophenes results in a morphology change in the HKUST-1 material. Composites were characterized by nitrogen sorption measurements, powder X-ray diffraction, and vibrational spectroscopy.

Version notes

This is the version first submitted for peer-reviewed publication. Some data has been added to the SI and some assignments in the PXRD pattern have been corrected.

Content

Thumbnail image of James Sullivan Marshall MOFS 2021 Preprint Version 1.3 Journal Submitted Version Unlinked.pdf

Supplementary material

Thumbnail image of Supporting information for James et al HKUST-1 Alkoxythiophenes Preprint v1_3.pdf
Supporting information for James et al HKUST-1 Alkoxythiophenes Preprint v1 3