Ligand engineering to achieve enhanced ratiometric oxygen sensing in a silver cluster-based metal-organic framework.

ABSTRACT: Ratiometric luminescent oxygen sensing based on dual fluorescence and phosphorescence emission in a single matrix is highly desirable, yet the designed synthesis remains challenging. Silver-chalcogenolate-cluster-based metal-organic frameworks that combine the advantages of silver clusters and metal-organic frameworks have displayed unique luminescent properties. Herein, we rationally introduce -NH₂ groups on the linkers of a silver-chalcogenolate-cluster-based metal-organic framework (Ag₁₂bpy-NH₂) to tune the intersystem crossing, achieving a dual fluorescence-phosphorescence emission from the same linker chromophore. The blue fluorescence component has a 100-nm gap in wavelength and 8,500,000-fold difference in lifetime relative to a yellow phosphorescenc

SUBMITTER: Dong XY 

PROVIDER: S-EPMC7376137 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature