Development of a boron-doping strategy to activate luminescence in a non-emissive silver-incorporated polyoxoniobate

O, has been successfully synthesized and characterized. Interestingly, doping the light element boron during the synthesis activated the originally non-emissive PONb, inducing strong luminescence. Mechanistic investigations using electron energy loss spectroscopy and thermally perturbed two-dimensional infrared spectroscopy revealed that boron doping enhances structural rigidity, suppressing non-radiative decay pathways. This work not only presents a rare silver-incorporated PONb but also develops a promising strategy for activating non-emissive silver-incorporated POMs.