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A Cd(II)-Tb(III) nanocluster {[Cd10Tb9L8(OH)16(OAc)23(H2O)3][Cd10Tb9L8(OH)16(OAc)23(H2O)4]}·3H2O (1), which contains two crystallographically independent components, was constructed from a tridentate ligand (HL, 3-ethoxysalicylaldehyde). It exhibits rapid and reliable excitation wavelength-dependent luminescence response to 2,6-dipicolinic… Click to show full abstract
A Cd(II)-Tb(III) nanocluster {[Cd10Tb9L8(OH)16(OAc)23(H2O)3][Cd10Tb9L8(OH)16(OAc)23(H2O)4]}·3H2O (1), which contains two crystallographically independent components, was constructed from a tridentate ligand (HL, 3-ethoxysalicylaldehyde). It exhibits rapid and reliable excitation wavelength-dependent luminescence response to 2,6-dipicolinic acid (DPA) [limit of detection = 0.23 nM], which is not influenced by aromatic carboxylates, amino acids, and ions. The test papers of 1 can be used to check DPA in solution. The equation IEx272nm/IEx329nm = 0.0109 × [DPA]2 + 0.106 × [DPA] + 2.39 of 1 for the luminescence response could be used to quantitatively measure the concentration of DPA in tap water. 1 displays rapid and stable luminescence response to DPA, with the sensing times shorter than 5 s and no changes for the lanthanide luminescence over 24 h.
Journal Title: Inorganic chemistry
Year Published: 2022
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