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Manual Assembly of Rare-earth Polyoxometalate Microcrystals Film Showing Highly Polarized Luminescence

Abstract

Currently, realization of rationally designed architectures based on polyoxometalates (POMs) with designed functions has mostly been achieved through the preparation of functional films. However, the traditional approaches suffer from drawbacks such as time-consuming process, ill-defined structure and quality, random orientation of POM molecules and unsatisfactory performance. In this work, microcrystals of Ag9[EuW10O36]·36H2O (denoted Ag9[EuW10O36]) were synthesized via titration method by reacting Na9[EuW10O36]·32H2O (denoted Na9[EuW10O36]), selected as a prototype, with Ag+ leading to the formation of water-insoluble crystalline powder with uniform hexagonal platelet morphology. Afterwards a simple yet efficient manual assembly method was used to fast manufacture Ag9EuW10O36 microcrystals thin films on glass substrate with high coverage, high crystallinity and highly preferential orientation. Notably, the as-prepared films emit orange polarized fluorescence with an anisotropy value of about 0.21, which is among the materials of largest anisotropy. It is expected that the manual assembly approach can be generally adopted in various polyoxometalate-based films assembly on various substrates for practical applications.

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Publication details

The article was accepted on 10 Jun 2017 and first published on 12 Jun 2017


Article type: Paper
DOI: 10.1039/C7DT02046E
Citation: Dalton Trans., 2017, Accepted Manuscript
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    Manual Assembly of Rare-earth Polyoxometalate Microcrystals Film Showing Highly Polarized Luminescence

    R. Zhang, L. Qin, A. Iqbal, Y. Zhou, L. Zhang, H. Ren, X. Lv and M. Li, Dalton Trans., 2017, Accepted Manuscript , DOI: 10.1039/C7DT02046E

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