Band gap analysis in MOF materials: Distinguishing direct and indirect transitions using UV–vis spectroscopy

Metal-Organic Frameworks (MOFs) have gained considerable attention due to their potential applications in gas storage, separation, and catalysis. These porous materials exhibit properties of interest for semiconductor physics and homogeneous photocatalysis, in which concepts from coordination chemistry and semiconductor physics are often mixed. In the photocatalysis field, the optical band gap of the semiconductors is a crucial parameter that determine their functionality. Despite all the interest of MOFs, there is still a considerable lack of information about their band gap evaluation (especially if the gap is direct or indirect) using UV–Vis spectroscopy, and there is a considerable scattering in these…

• UD
  Université de Lille
• MD
  Ministère de l'Education Nationale, de l'Enseignement Supérieur et de la Recherche
• CN
  Centre National de la Recherche Scientifique
• RH
  Région Hauts-de-France
• IC
  Institut Chevreul
• ER
  European Regional Development Fund