Structural, Magnetic and Luminescent Properties of Lanthanide Complexes with N-Salicylideneglycine

International Journal of Molecular Sciences

Roman Boča¹  Ján Vančo²  Zdeněk Trávníček²  Ondřej Kozák³ 

[1] Department of Chemistry, FPV, University of SS Cyril and Methodius, Trnava SK-91701, Slovakia;Regional Centre of Advanced Technologies and Materials & Department of Inorganic Chemistry, Faculty of Science, Palacký University in Olomouc, 17. listopadu 12, Olomouc CZ-77146,Czech Republic;Regional Centre of Advanced Technologies and Materials, Division of Metal Nanomaterials, Faculty of Science, Palacký University in Olomouc, Šlechtitelů 11, Olomouc CZ-78371,Czech Republic;

关键词: lanthanide;    Schiff base;    salicylideneglycine;    magnetic properties;    luminescent properties;    X-ray structure;   

DOI  :  10.3390/ijms16059520

来源: DOAJ

【 摘 要 】

A series of anionic heavy lanthanide complexes, involving theN-salicylideneglycinato(2-) Schiff base ligand (salgly) and having the general formula K[Ln(salgly)2(H2O)2]∙H2O (1–6), where Ln stands for Gd, Tb, Dy, Ho, Er and Tm,was prepared using the one-pot template synthesis. The complexes were thoroughly characterized by elemental and Thermogravimetric/Differential Thermal Analyses (TG/DTA), Fourier Transform Infrared Spectroscopy (FT-IR), and photoluminescence spectroscopies, electrospray-ionization mass spectrometry, and their magnetic properties were studied by temperature-dependent dc magnetic measurements using the superconducting quantum interference device (SQUID). The X-ray structure of the terbium(III) complex (2), representing the unique structure between the lanthanide complexes of N-salicylideneamino acids, was determined. The results of spectral and structural studies revealed the isostructural nature of the prepared complexes, in which the lanthanide ion is octacoordinated by two O,N,O-donor salgly ligands and two aqua ligands. The analysis of magnetic data confirmed that the complexes behave as paramagnets obeying the Curie law. The results of photoluminescence spectral studies of the complexes showed the different origin in their luminescent properties between the solid state and solution. An antenna effect of the Schiff base ligand was observed in a powder form of the complex only, while it acts as a fluorophore in a solution.

【 授权许可】

Unknown