Aqueous Eu(II)-Containing Complex with Bright Yellow Luminescence

Eu(II)-containing materials have unique luminescence, redox, and magnetic properties that have potential applications in optoelectronics, sensors, and imaging. Here, we report the synthesis and characterization of Eu(II)-containing aza-222 cryptate that displays yellow luminescence and a quantum yie...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2015-04, Vol.137 (15), p.4960-4963
Main Authors: Kuda-Wedagedara, Akhila N W, Wang, Chengcheng, Martin, Philip D, Allen, Matthew J
Format: Article
Language:English
Subjects:
Coordination Complexes - chemistry
Europium - chemistry
Luminescence
Luminescent Measurements
Molecular Structure
Solutions
Water - chemistry
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Summary:Eu(II)-containing materials have unique luminescence, redox, and magnetic properties that have potential applications in optoelectronics, sensors, and imaging. Here, we report the synthesis and characterization of Eu(II)-containing aza-222 cryptate that displays yellow luminescence and a quantum yield of 26% in aqueous media. The crystal structure reveals a staggered hula-hoop geometry. Both solid-state and solution-phase data are presented that indicate that the high quantum yield is a result of the absence of OH oscillators in the inner sphere of the complex. We expect that Eu(II)-containing aza-222 cryptate is a step toward Eu(II)-containing luminescent materials that can be used in a variety of applications including biological imaging.
ISSN:1520-5126
DOI:10.1021/jacs.5b02506