Research Progress in the White Light-Emitting Lanthanide-Based Complex/Coordination Polymer Materials

Abstract

Color-tunable and white light-emitting lanthanide-based complex/coordination polymer materials have attracted increasing interest recently due to the exceptional luminescent and chromogenic properties. Recent advances from 2014 to 2018 on white-light-emitting lanthanide-based materials are classifiedly highlighted in light of different aggregate states and lanthanide species in the coordination assemblies. The future advances in this field are also predicted.

Tailoring photoluminescence and multifunctionalities of lanthanide coordination complexes employing ligand-controlled aggregation states

“…As we know, the doping of Ln 3+ complexes into PMMA matrices not only restrains the formation of aggregates, but also enhances the luminescence properties due to the auxiliary sensitization of Ln 3+ , 15,42 thereby resulting in Tb 3+ characteristic emission, thanks to the elevation of TL T 1 energy. 34 Thus, as a control, we investigated the photophysical properties of TL@PMMA and TL-Eu/Tb@PMMA films.…”

“…Although the single lanthanide (Ln 3+ )doped approach is efficient and highly desirable, it is challenging and has been rarely studied, limiting its widespread application due to unsatisfactory light color purity. 5,[14][15][16][17] Another popular strategy is the co-doping of multiple Ln 3+ , where ligand-centered blue emission combines with complementary co-doped Eu 3+ and Tb 3+ emission. 18,19 However, based on these strategies, WLE is observed only in solution/the solid state/the doped state, which may be ascribed to the aggregation states of ligands (e.g., aggregation-induced quenching/ emission).…”

Tunable White Light Emission of a Metal–Organic Framework Based on a Bisquinoxaline Derivative by Introducing Red–Green Cationic Dyes

“…However, in this strategy, the MOF host often exhibits emission in the UV region and therefore requires the adsorption of red–green–blue dyes to modulate the white light emission performance. The complicated energy-transfer pathways result in a limited number of MOF ⊃ dyes phosphors exhibiting excellent CRI and quantum yield values simultaneously. − …”