Linker Functionalization in MIL-47(V)-R Metal-Organic Frameworks: Understanding the Electronic Structure

Danny E. P. Vanpoucke*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

7 Citations (Web of Science)

Abstract

Metal organic frameworks (MOFs) have gained much interest due to their intrinsic tunable nature. In this work, we study how linker functionalization modifies the electronic structure of the host MOF, more specifically, the MIL-47(V)-R (R = -F, -Cl, -Br, -OH, -CH3(,) -CF3, and -OCH3). It is shown that the presence of a functional group leads to a splitting of the pi orbital on the linker. Moreover, the upward shift of the split:off pi-band correlates well with the electron-withdrawing/donating nature of the functional groups. For halide functional groups the presence of lone-pair back-donation is corroborated by calculated Hirshfeld-I charges. In the case of the ferromagnetic configuration of the host MIL-47(V+IV) material a half-metal to insulator transition is noted for the -Br, -OCH3, and -OH functional groups, while for the antiferromagnetic configuration only the hydroxy group results in an effective reduction of the band gap.

Original languageEnglish
Pages (from-to)8014-8022
Number of pages9
JournalJournal of Physical Chemistry C
Volume121
Issue number14
DOIs
Publication statusPublished - 13 Apr 2017
Externally publishedYes

Keywords

  • EXTENDING HIRSHFELD-I
  • BAND-GAP
  • ELECTRICAL-CONDUCTIVITY
  • MAGNETIC-PROPERTIES
  • ADSORPTION
  • CO2
  • MOFS
  • OXIDATION
  • MIL-53
  • BULK

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