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

Abstract

Polyoxometalate-based metal-organic frameworks (POM-MOFs) hybrid materials have received increasing attention which have the advantages of both POMs and MOFs. Herein, we encapsulate Lanthanide (III) (Ln3+) cations (Eu3+, Tb3+, Sm3+and Dy3+ ) into the channels of [Cu2(BTC)4/3 (H2O)2]6[HPMo12O40]·(C4H12N)2·20H2O (NENU-5) nanocrystals by exchanging the (C4H12N)+ with Ln3+ . The structure, composition, thermal stability, morphology, 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 possess uniform mesoporous structure, good crystallization and relatively excellent luminescence properties. Furthermore, photofunctional Ln3+ functionalized POM-MOFs hybrids are dispersed in ionic liquid compound (1-(2-hydroxyethyl)-3-methylimidazolium bromide) which has little effect on luminescence to product soft iono-gel. Finally, we manufacture the thin films of them by assembling the the hybrids on a quartz plate using a polymer linker to achieve further practical application. Both the fluorescence of lanthanide hybrid materials and thin films can be adjusted by different Ln3+composition or excitation wavelengths and finally reach white light output.

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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, Accepted Manuscript
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    Polyoxometalate-based metal–organic frameworks 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, Accepted Manuscript , DOI: 10.1039/C8CE01979G

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