Divergent Adsorption-Dependent Luminescence of Amino-Functionalized Lanthanide Metal–Organic Frameworks for Highly Sensitive NO 2 Sensors

Arturo Gamonal (1) , Chen Sun (1) , A. Lorenzo Mariano (2) , Estefania Fernandez-Bartolome (1) , Elena Guerrero-Sanvicente (1) , Bess Vlaisavljevich (3) , Javier Castells-Gil (4) , Carlos Martí-Gastaldo (4) , Roberta Poloni (2) , Reinhold Wannemacher (1) , Juan Cabanillas-Gonzalez (1) , José Sánchez Costa (1)

1 Instituto IMDEA Nanociencia [Madrid]
2 SIMaP - Science et Ingénierie des Matériaux et Procédés
3 USD - University of South Dakota [Vermillion]
4 ICMol - Instituto de Ciencia Molecular

A novel gas sensing mechanism exploiting lanthanide luminescence modulation upon NO₂ adsorption is demonstrated here. Two isostructural lanthanide-based metal–organic frameworks (MOFs) are used, including an amino group as the sensitive recognition center for NO₂ molecules. The transfer of energy from the organic ligands to Ln is strongly dependent on the presence of NO₂, resulting in an unprecedented photoluminescent sensing scheme. Thereby, NO₂ exposition triggers either a reversible enhancement or a decrease in the luminescence intensity, depending on the lanthanide ion (Eu or Tb). Our experimental studies combined with density functional theory and complete active space self-consistent field calculations provide an understanding of the nature and effects of NO₂ interactions within the MOFs and the signal transduction mechanism.

Mots clés: Luminescence; Ligands; Molecules; Ions; Metal organic frameworks

Domaines: Chimie théorique et/ou physique; Matériaux

Arturo Gamonal, Chen Sun, A. Lorenzo Mariano, Estefania Fernandez-Bartolome, Elena Guerrero-Sanvicente, et al.. Divergent Adsorption-Dependent Luminescence of Amino-Functionalized Lanthanide Metal–Organic Frameworks for Highly Sensitive NO 2 Sensors. Journal of Physical Chemistry Letters, 2020, 11 (9), pp.3362-3368. ⟨10.1021/acs.jpclett.0c00457⟩. ⟨hal-02863400⟩