Water-Stable Carborane-Based Eu³⁺/Tb³⁺ Metal-Organic Frameworks for Tunable Time-Dependent Emission Color and Their Application in Anticounterfeiting Bar-Coding.

On the one hand, the increase in the molar fraction of Eu from 0 to 0.08 in the mixed Ln-MOF preparation caused a quite significant and gradual shift of the emission color, from green ( m CB-Tb ) to orange ( Figure 4 b), as shown also by the corresponding CIE color coordinates and representative luminescence microscopy images (inset Figure 4 d).

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