A Promising White-Light-Emitting Material Constructed from Encapsulating Eu3+/Tb3+ Hybrid Ions into a Robust Microporous Metal-Organic Framework

摘要

Metal-organic frameworks (MOFs) as extremely promising luminescent materials have become a hot area of research in recent years. Porous MOFs containing uncoordinated groups within the pores play a central role in the functional properties of the material and create a driving force for loading lanthanide(III) (Ln(3+)) ions. In this work, we report the fascinating {[Zn(H(2)thca)(0.5)(tib)]center dot 5H(2)O}(n) [1; H(6)thca = p-terphenyl-3,3',3 '',5,5',5 ''-hexacarboxylic acid; tib = 1,3,5-tris(imidazolyl)benzene] MOF, which has a permanently porous structure and uncoordinated carboxyl groups within the pores; it can emit blue light and can serve as a host for several guest Ln(3+) ions. Strong red fluorescence and green fluorescence can be generated by introducing Eu3+ and Tb3+ ions into the pores of compound 1, respectively. Furthermore, the luminescence properties of Ln(3+)@1 can be easily modulated simply by adjusting the amounts of complexing Tb3+ and Eu3+ ions, and in this way the material exhibits broadband white emission with ideal CIE coordinates of (0.3438, 0.3547). This work provides a simple and practical strategy for the design and development of whitelight emitters based on lanthanide-functionalized MOFs, which opens a new perspective for the development of white-lightemitting materials.