Issue 3, 2017

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

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

Supplementary files

Article information

Article type
Research Article
Submitted
28 nov 2016
Accepted
11 jan 2017
First published
12 jan 2017

Inorg. Chem. Front., 2017,4, 547-552

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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