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Performance of Tris(2-methyl-8-quinolinolato)aluminum as Fluorescent Anionophore

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Abstract

An X-ray crystallographic study demonstrated that the tris complex of Al3+ with 2-methyl-8-quinolinol (Hmq), [Al(mq)3], had a discrete octahedral geometry in a meridional configuration with respect to mq–; the Al–N bonds were appreciably elongated. In organic solvents, the complex reacted with water to give a lower species of a µ-oxo dimer, [Al2O(mq)4], and a protonated ligand, depending on the concentrations of water and of excess ligand. None of Cl–, Br–, I–, ClO4–, and CH3COO– showed any reactions with [Al(mq)3]. The anions having high affinities to Al3+, such as H2PO4– and F–, replaced all the ligand. The anion having a lower affinity, HSO4–, exclusively formed a mixed-ligand complex of [Al(mq)2HSO4], which had a more intense fluorescence than the others. In contrast, the corresponding 8-quinolinol (Hq) complex, [Alq3], showed no reactions with any anions.

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Authors and Affiliations

  1. Nagoya Institute of Technology, Gokiso, Showa, Nagoya, 466-8555, Japan

    Akio Yuchi, Hiroaki Hiramatsu, Miyuki Ohara & Nayumi Ohata

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  1. Akio Yuchi
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  2. Hiroaki Hiramatsu
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  3. Miyuki Ohara
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  4. Nayumi Ohata
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Correspondence to Akio Yuchi.

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Yuchi, A., Hiramatsu, H., Ohara, M. et al. Performance of Tris(2-methyl-8-quinolinolato)aluminum as Fluorescent Anionophore. ANAL. SCI. 19, 1177–1182 (2003). https://doi.org/10.2116/analsci.19.1177

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  • DOI: https://doi.org/10.2116/analsci.19.1177

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