Controllable luminescence of layered rare-earth hydroxide composites with a fluorescent molecule: blue emission by delamination in formamide

Abstract

We demonstrate the first example of exfoliated layered europium hydroxide (LEuH) composites with a fluorescent molecule that exhibit blue luminescence. Co-quenching in the solid state, blue emission (440 nm) in formamide, and green emission (514 nm) in water–formamide were found, for which delamination and swollen states account for the versatile luminescence behaviors.