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Issue 43, 2011
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BODIPY chromophores as efficient green light sensitizers for lanthanide-induced near-infrared emission

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Abstract

A new boron dipyrromethene (BODIPY) modified 8-hydroxylquinoline ligand (8-HOQ-BODIPY) is synthesized for the sensitization of near-infrared emission of lanthanide(III) ions. The BODIPY unit, as revealed by single-crystal X-ray diffraction analysis, aligns almost perpendicularly to the 8-HOQ unit. The ligand exhibits strong absorption at ∼506 nm and fluorescence at 510 nm in organic solvents with quantum yields ranging from ∼0.45 in dichloromethane to 0.015 in ethanol. It forms stable ytterbium(III), erbium(III) and neodymium(III) complexes with 3 : 1 ligand-to-metal molar ratios. Upon excitation (∼522 nm), the neodymium(III) and erbium(III) complexes emit weakly at 1060 and 1382 nm, respectively, whereas the ytterbium(III) complex exhibits strong emission at 976 and 1003 nm. The results demonstrate the potential of BODIPY dyes as efficient and robust visible light sensitizers for lanthanide-based NIR emitters in medical diagnosis.

Graphical abstract: BODIPY chromophores as efficient green light sensitizers for lanthanide-induced near-infrared emission

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Publication details

The article was received on 16 Jun 2011, accepted on 08 Aug 2011 and first published on 15 Sep 2011


Article type: Paper
DOI: 10.1039/C1DT11137J
Citation: Dalton Trans., 2011,40, 11389-11395
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    BODIPY chromophores as efficient green light sensitizers for lanthanide-induced near-infrared emission

    Y. Zhong, L. Si, H. He and A. G. Sykes, Dalton Trans., 2011, 40, 11389
    DOI: 10.1039/C1DT11137J

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