3 years ago

Fluorescence and magnetism of two novel isostructural Dy(III) and Tb(III) complexes based on 5-azotriazolyl salicylic acid ligand

Fluorescence and magnetism of two novel isostructural Dy(III) and Tb(III) complexes based on 5-azotriazolyl salicylic acid ligand
Two isostructural Dy(III) and Tb(III) complexes based on 5-azotriazolyl salicylic acid (H3ATSA) ligand of [Ln(HATSA)(OAc)(H2O)2]·4H2O [Ln=Dy (1), Tb (2)] have been synthesized and characterized by single-crystal X-ray diffraction analysis. Each Dy(III) and Tb(III) ion coordinates to eight oxygen atoms to form an eight-coordinated square antiprism geometry. The two-dimensional coordinated layers are further linked to a stable three-dimensional supramolecular network by π-π stacking interactions. The fluorescent and magnetic properties of 1 and 2 were investigated and discussed. The solid sample of 2 shows four characteristic emission bands at 490, 546, 585 and 622nm for Tb(III) ion under excitation at 313nm. The alternating current (ac) magnetic susceptibility for 1 shows an increase of frequency-dependent.

Publisher URL: www.sciencedirect.com/science

DOI: S0020169317310356

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