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Issue 3, 2017
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Encapsulation of an iridium complex in a metal–organic framework to give a composite with efficient white light emission

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Abstract

We successfully synthesized a novel anionic luminescent metal–organic framework (MOF) (NENU-524) with a lonsdaleite topology. NENU-524 contains a trigonal prismatic unit {Zn8(btca)6(2-NH2-bdc)3} that can be regarded as a double secondary building unit with an unusual triply bound triangular frustum geometry. The prepared NENU-524 had a permanent porosity and excellent stability in air. NENU-524 was used as a platform to encapsulate yellow-emitting [Ir(ppy)2(bpy)]+ cations in the nanotube channels of the blue-emitting MOF via an ion-exchange process. The [Ir(ppy)2(bpy)]+@NENU-524 MOF ([Ir(ppy)2(bpy)]+ concentration 3.86 wt%) emitted a pure white light with CIE coordinates of (0.300, 0.336) and a high quantum yield of up to 15.2%. The white light-emitting diodes assembled using [Ir(ppy)2(bpy)]+@NENU-524 as a white phosphor emitted a bright white light, suggesting that the composite is a promising material for use in lighting. The assembled white light-emitting diodes continued to emit a bright white light for up to one month. This simple and feasible approach could be used to develop luminescent luminophor@MOFs composites for practical applications.

Graphical abstract: Encapsulation of an iridium complex in a metal–organic framework to give a composite with efficient white light emission

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Publication details

The article was received on 28 Nov 2016, accepted on 11 Jan 2017 and first published on 12 Jan 2017


Article type: Research Article
DOI: 10.1039/C6QI00528D
Citation: Inorg. Chem. Front., 2017,4, 547-552
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    Encapsulation of an iridium complex in a metal–organic framework to give a composite with efficient white light emission

    W. Xie, J. Qin, W. He, K. Shao, Z. Su, D. Du, S. Li and Y. Lan, Inorg. Chem. Front., 2017, 4, 547
    DOI: 10.1039/C6QI00528D

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