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Color Tunable Long-Lasting Phosphorescence in Mn2+-Doped Anionic Metal-Organic Framework

Abstract

Luminescent metal-organic frameworks (MOFs) have received much attention due to their structural tunability and broad light-emitting applications. The fluorescence emission of such inorganic–organic hybrids is highly tuned by encapsulation of guest species such as cations, anions, vapors, dyes and so on. In contrast, the phosphorescent tunability for MOFs has rarely been reported. In this work, an anionic MOF [CdLi(IPA)2](Me2NH2) (AMOF-1) (IPA= isophthalic acid, Me2NH2 = dimethylamine) was prepared under solvothermal condition, which presents green long-lasting phosphorescence (LLP). Single-crystal structural analysis reveals that the channels of AMOF-1 are lined with the π-electron-rich phenyl rings of IPA and occupied by exchangeable (Me2NH2)+ guest. Based on a facile cationic exchange with Mn2+ at different concentrations, the LLP performance of AMOF-1 can be further adjusted in an unusually wide range crossing blue, violet, white, yellow, orange then to red. Furthermore, the AMOF-1 could also serve as a Cu2+ ion responsive phosphorescence on-off switch due to the reversible change in the LLP emission. Therefore, this work not only supplies a facile way to develop new type of multi-color LLP materials, but also provides a strategy to obtain cation-responsive sensor based on the anionic MOF.

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Publication details

The article was received on 06 Jun 2017, accepted on 13 Jul 2017 and first published on 14 Jul 2017


Article type: Paper
DOI: 10.1039/C7TC02493B
Citation: J. Mater. Chem. C, 2017, Accepted Manuscript
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    Color Tunable Long-Lasting Phosphorescence in Mn2+-Doped Anionic Metal-Organic Framework

    X. Yang and D. Yan, J. Mater. Chem. C, 2017, Accepted Manuscript , DOI: 10.1039/C7TC02493B

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