Investigating the Case of Titanium(IV) Carboxyphenolate Photoactive Coordination Polymers

Hala Assi, Laura C. Pardo Pérez, Georges Mouchaham, Florence Ragon, Maxim Nasalevich, Nathalie Guillou, Charlotte Martineau, Hubert Chevreau, Freek Kapteijn, Jorge Gascon, Pierre Fertey, Erik Elkaim, Christian Serre*, Thomas Devic

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

The reactivity of 2,5-dihydroxyterephthalic acid (H4DOBDC) with titanium(IV) precursors was thoroughly investigated for the synthesis of metal-organic frameworks under solvothermal conditions. Four crystalline phases were isolated whose structures were studied by a combination of single-crystal or powder X-ray diffraction and solid-state NMR. The strong coordination ability of the phenolate moieties was found to favor the formation of isolated TiO6 octahedra bearing solely organic ligands in the resulting structures, unless hydrothermal conditions and precondensed inorganic precursors are used. It is worth noting that these solids strongly absorb visible light, as a consequence of the ligand-to-metal charge transfer (LMCT) arising from Ti-phenolate bonds. Preliminary photocatalytic tests suggest that one compound, namely, MIL-167, presents a higher activity for hydrogen evolution than the titanium carboxylate MIL-125-NH2 but that such an effect cannot be directly correlated with its improved light absorption feature.

Original languageEnglish (US)
Pages (from-to)7192-7199
Number of pages8
JournalInorganic Chemistry
Volume55
Issue number15
DOIs
StatePublished - Aug 1 2016

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

Fingerprint Dive into the research topics of 'Investigating the Case of Titanium(IV) Carboxyphenolate Photoactive Coordination Polymers'. Together they form a unique fingerprint.

Cite this