Luminescent lanthanide barcodes based on postsynthetic modified nanoscale metal–organic frameworks†

Abstract

A new method for luminescent barcode based on nanoscale MOFs (MOF-253) is displayed, which the barcoding is realized by postsynthetic method (PSM) to introduce lanthanide ion (Eu³⁺, Tb³⁺ and Sm³⁺). The framework does not preferentially include either lanthanide ion, and then any desired lanthanide composition in the result product can be achieved by controlling the stoichiometry of the reactant. The emission intensity of each of lanthanide ion is proportional to its amount in the MOF, resulting in unique luminescent barcodes that depend on the lanthanide ion ratios and compositions. The synthesized barcoded material is successfully applied in marking functional ionic liquid and preparing luminescent thin film.