Tuning the rare-earth UiO-66 metal–organic framework platform for white light emission

Abstract

Metal–organic frameworks (MOFs) have received notable attention owing to their structural diversity, permanent porosity, and high surface areas. In addition to these properties, rare-earth (RE) MOFs have the added feature...

Lanthanide Metal–Organic Frameworks Exhibiting Fluoro-Bridged Extended Chains: Synthesis, Crystal Structures, and Magnetic Properties

“…A similar trend is found in the other four MOFs as shown in Tables and . Previously, several papers have indicated the possible presence of a mixed hydroxy-bridged and fluoro-bridged cluster. ,− The ratios found from EDS do not give any indication that there is a lack of fluorine due to replacement of fluorides with hydroxides in MOFs Ho-BPDC-2 , and Tb-BPDC-2 . Gd-BPDC-1 , Gd-BPDC-2 , and Tb-BPDC-1 show a minor deficiency in fluorine content, which indicates that some hydroxy/oxy bridges might be present.…”

Fluoro-bridged rare-earth metal–organic frameworks

“…49 Several fluorinated MOFs have focused on the creation of white light emission. 58 For example, for RE-UiO-66, the combination of three lanthanides (RE = Eu( iii ), Tb( iii ) and Gd( iii )) produced white light. The mono- bi- and tri-metal nodes of RE-UiO-66 were synthesized, and the elemental analysis of the bi- and tri-analogues, determined by ICP-MS and SEM-EDS, showed an even distribution of Eu( iii ), Tb( iii ) and Gd( iii ) ions.…”

“…The highly desirable white light emission applicable in solid state lighting and display applications was found for the optimised Tb : Gd : Eu-UiO-66. 58 Another study reported fluorinated 2-dimensional metalorganic frameworks (MOFs) using rare-earth metal ions to selectively detect vapours of volatile organic compounds and Dalton Transactions Frontier nitroaromatic explosives. 59 The photoluminescence of hexanuclear UCY-15 [RE 6 (μ 3 -OH/F) 8 (SDBA) 4 (NO 3 ) 2 (H 2 O) 6 ] n (RE = Y, Eu, Gd, Tb) used 4,4′-sulfonyldibenzoic acid (H 2 SDBA) linker (Fig.…”

Multi-luminescent center integrated metal–organic frameworks for high-performance white light-emitting diodes

“…Since the first use of MOFs in WLEDs, these multifunctional materials have been demonstrated as an effective photonic platform for achieving white light emission. 17 Based on different types of emission centers in MOFs, several strategies have been demonstrated to generate white light emission: (1) metal nodes or the secondary building units (SBUs), 18,19 (2) organic ligands, 20,21 (3) metal nodes combined with ligands, 22,23 (4) guest species, 24,25 (5) organic ligands combined with guest species 26,27 and (6) metal nodes combined with guest species. 28 In contrast to the building units of MOFs as emission centers, the encapsulated guests, especially dyes, feature a wider spectrum covering, higher photoluminescence quantum yield (PLQY) and a wider selection of MOFs.…”