Intense multi-colored luminescence in a series of rare-earth metal–organic frameworks with aliphatic linkers

Intense multi-colored luminescence in a series of rare-earth metal–organic frameworks with aliphatic linkers Full article

Journal

Dalton Transactions
ISSN: 1477-9234 , E-ISSN: 1477-9226

Output data

Year: 2021, Volume: 50, Number: 34, Pages: 11899-11908 Pages count : 10 DOI: 10.1039/d1dt00872b

Authors

Demakov Pavel A. ¹ , Ryadun Alexey A. ¹ , Dorovatovskii Pavel V. ² , Lazarenko Vladimir A. ² , Samsonenko Denis G. ¹ , Brylev Konstantin A. ¹ , Fedin Vladimir P. ¹ , Dybtsev Danil N. ¹

Affiliations

1	Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, Akad. Lavrentieva ave 3, Novosibirsk 630090, Russia
2	National Research Centre “Kurchatov Institute”, Kurchatov Square 1, Moscow 123182, Russia

Two series of highly luminescent yttrium(III), europium(III) and terbium(III) metal–organic frameworks containing diimine aromatic ligands and the dicarboxylate linker trans-1,4-cyclohexanedicarboxylate (chdc2−) which can be described by the general formulas [M2(bpy)2(chdc)3], where M = Y3+ (1), Eu3+ (2), and Tb3+ (3) and bpy = 2,2′-bipyridyl, and [M2(phen)2(chdc)3], where M = Y3+ (4), Eu3+ (5), and Tb3+ (6) and phen = 1,10-phenanthroline, were synthesized and characterized. All compounds are based on the same dinuclear {M2(L)2(OOCR)6} building blocks and possess a similar topology of the 3D framework with narrow pores. The chelate aromatic ligands act as efficient light-harvesting antennas for subsequent energy transfer to the emitting metal center (M = Eu3+, Tb3+) or intraligand photoemission (M = Y3+). As a result, the reported compounds display intense emission in the red (Eu3+), green (Tb3+) or blue (Y3+) regions representing three basic colors (RGB) of visible light. The measured quantum yields (QYs) of the solid-state luminescence for individual compounds were found to be 63% (1), 46% (2), 59% (3), 2.3% (4), 55% (5) and 49% (6). The drastic reduction of the luminescence efficiency for 4 is explained by the strong disorder of phen ligands. The high thermal stability (up to 300 °C) and exceptional moisture resistance of the bpy-based frameworks 1–3 were confirmed by TG and PXRD measurements. Various bimetal or trimetal compositions were also prepared for the bpy-series. The luminescence properties of these mixed-metal compounds depend on both the chemical composition and excitation wavelength (λex). Remarkably, pure white emission with color temperature = 6126 K was achieved for [Y1.68Eu0.08Tb0.24(bpy)2(chdc)3] at λex = 360 nm with QY = 20%. The reported results suggest that the obtained coordination framework series is a convenient platform for the design of highly efficient light emitting materials with tunable properties.

Demakov P.A. , Ryadun A.A. , Dorovatovskii P.V. , Lazarenko V.A. , Samsonenko D.G. , Brylev K.A. , Fedin V.P. , Dybtsev D.N.
Intense multi-colored luminescence in a series of rare-earth metal–organic frameworks with aliphatic linkers
Dalton Transactions. 2021. V.50. N34. P.11899-11908. DOI: 10.1039/d1dt00872b WOS Scopus РИНЦ OpenAlex

Submitted:	Mar 17, 2021
Published print:	Aug 10, 2021

Web of science:	WOS:000683355600001
Scopus:	2-s2.0-85114033932
Elibrary:	46974397
OpenAlex:	W3187153913

DB	Citing
Web of science	13
Scopus	12
OpenAlex	13