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Updated: Jan 19, 2026
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Published on: April 14, 2020
Encapsulating Halometallates into 3-D Lanthanide-Viologen Frameworks: Controllable Emissions, Reversible
Yan He1, You-Ren Huang1, Yan-Li Li1
1College of Chemistry , Fuzhou University , Fuzhou , Fujian 350108 , China.
Abstract:
The encapsulation of guests into metal-organic frameworks (MOF) is an efficient strategy to generate novel multifunctional materials with enhanced properties. Herein, four halometallate@MOF composites with formulas of {(Pb2I4Br3)[(Pr(bpdo)4(H2O)2]·(H2O)} (1), {[Pb3I10(H2O)2][Y2(bpdo)5(OH)2]·4(H2O)} (2), {(Bi2I9)[(Pr(bpdo)3(H2O)]} (3), {(Bi4I18)[(La(bpdo)4(H2O)2]2} (4) (bpdo = 4,4'-bipyridine N,N'-dioxide) were prepared. In these composites, lanthanide-viologen MOF act as matrices, whose cavities were penetrated by halometallates. Consequently, the insertion of electron-rich halometallates into electron-deficient lanthanide-viologen matrices leads to the presence of strong room temperature charge transfer (CT) interactions. Importantly, these composites exhibit enhanced photo/thermal stabilities, controllable white emissions, reversible thermochromisms, and good photocurrent response performances. Specially, the memory devices based on these composites illustrate reversible electrical bistability behaviors, which can be assigned to ohmic and space-charge-limited conduction (SCLC) mechanisms. This kind of composite can be utilized as a multifunctional platform with enhanced stability.
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