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Issue 46, 2016
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A highly stable and white-light-emitting Eu(iii) MOF

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Abstract

A long π-conjugated organic ligand 2-(2,4-disulfophenyl)imidazo(4,5-f)(1,10)-phenanthroline (H3sfpip) featuring blue-green emission was used to construct Eu(III) MOFs to obtain a target white-light-emitting LnMOF with no dopant atom in its structure. Two complexes, [Eu(H2O)2(OH)(Hsfpip)]·H2O (1) and [Eu(H2O)(oa)0.5(Hsfpip)]·2H2O (2), were successfully synthesized under similar hydrothermal reaction conditions. The absence or presence of an ancillary ligand such as oxalic acid (oa) showed direct influence on the coordination mode of the Hsfpip linker and in the final topology of the polymeric structure. Complex 1 displays an unstable 2D polymeric structure and weak red luminescence from Eu3+ due to the quenching effect of high-energy O–H oscillators around the inner coordination sphere of the metal center, whereas the introduction of an ancillary ligand such as oxalic acid results in a tight-bonding 3D polymeric structure and an intense white light emission from complex 2. Moreover, due to the skeleton rigidity and robustness of complex 2, the white light emission can be improved via a heating process.

Graphical abstract: A highly stable and white-light-emitting Eu(iii) MOF

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Supplementary files

Article information


Submitted
20 Sep 2016
Accepted
25 Oct 2016
First published
26 Oct 2016

Dalton Trans., 2016,45, 18661-18667
Article type
Paper

A highly stable and white-light-emitting Eu(III) MOF

Y. Wei, R. Sa and K. Wu, Dalton Trans., 2016, 45, 18661
DOI: 10.1039/C6DT03655D

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