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Updated: Apr 26, 2026
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Published on: August 20, 2012
Fluorescence and metal-ion recognition properties of acetylacetone-based ligands
Hisanori Ando1, Keiko Tawa2, Mutsuo Tanaka3
1Research Institute for Cell Engineering, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan. h-ando@aist.go.jp
Abstract:
A new acetylacetone-based ligand (Ligand 1) bearing pyrene unit was synthesized and the fluorescence and metal-ion recognition properties were investigated in the presence of a different metal ion in acetonitrile solution. The fluorescence emission of Ligand 1 was strongly quenched by complexation with Cu(2+) while no significant change was observed in the presence of other metal ions. The metal-ion selectivity changed from Cu(2+) to Ni(2+) when glycine moiety (-NH-CH2-CO-) was introduced into Ligand 1 as spacer. This result implies that hydrogen-bonding induced by the glycine moiety affects the binding ability of ligands to metal ions, resulting in change of the metal-ion selectivity.
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