Synergistic binding sites in a metal-organic framework for the optical sensing of nitrogen dioxide.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 37130858.
- Also identified by DOI 10.1038/s41467-023-38170-9 and PMC identifier 10154382.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Luminescent metal-organic frameworks are an emerging class of optical sensors, able to capture and detect toxic gases. Herein, we report the incorporation of synergistic binding sites in MOF-808 through post-synthetic modification with copper for optical sensing of NO<sub>2</sub> at remarkably low concentrations. Computational modelling and advanced synchrotron characterization tools are applied to elucidate the atomic structure of the copper sites. The excellent performance of Cu-MOF-808 is explained by the synergistic effect between the hydroxo/aquo-terminated Zr<sub>6</sub>O<sub>8</sub> clusters and the copper-hydroxo single sites, where NO<sub>2</sub> is adsorbed through combined dispersive- and metal-bonding interactions.