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Issue 7, 2019
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Polyoxometalate-based metal–organic framework NENU-5 hybrid materials for photoluminescence tuning by introducing lanthanide ions and their functionalized soft ionogel/thin film

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Abstract

Polyoxometalate-based metal–organic framework (POM-MOF) hybrid materials have received increasing attention, and have the advantages of both POMs and MOFs. Herein, we encapsulate lanthanide(III) (Ln3+) cations (Eu3+, Tb3+, Sm3+ and Dy3+) in the channels of [Cu2(BTC)4/3(H2O)2]6[HPMo12O40]·(C4H12N)2·xH2O (x = 25–30, NENU-5) nanocrystals by exchanging the (C4H12N)+ with Ln3+. The structure, composition, thermal stability, morphology, and absorption of ultraviolet and visible light of the obtained hybrids are characterized by PXRD, ICP, FTIR, SEM and UV-vis DRS. The photophysical properties of these materials are investigated in detail under ultraviolet radiation, displaying the characteristic emission line of the corresponding Ln3+ ions. These physical characterizations prove that these hybrid materials exhibit a uniform mesoporous structure, good crystallization and multi-color luminescence. Furthermore, photofunctional Ln3+ functionalized POM-MOF hybrids are dispersed in an ionic liquid compound (1-(2-hydroxyethyl)-3-methylimidazolium bromide) which has little effect on luminescence to produce a soft ion gel. Finally, we manufacture their thin films by assembling the hybrids on a quartz plate using a polymer linker to achieve further practical application. Both the fluorescence of lanthanide hybrid materials and that of thin films can be adjusted by different Ln3+ compositions or excitation wavelengths and finally reach white light output.

Graphical abstract: Polyoxometalate-based metal–organic framework NENU-5 hybrid materials for photoluminescence tuning by introducing lanthanide ions and their functionalized soft ionogel/thin film

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Publication details

The article was received on 21 Nov 2018, accepted on 09 Jan 2019 and first published on 10 Jan 2019


Article type: Paper
DOI: 10.1039/C8CE01979G
Citation: CrystEngComm, 2019,21, 1186-1192

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    Polyoxometalate-based metal–organic framework NENU-5 hybrid materials for photoluminescence tuning by introducing lanthanide ions and their functionalized soft ionogel/thin film

    B. Wang and B. Yan, CrystEngComm, 2019, 21, 1186
    DOI: 10.1039/C8CE01979G

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