A series of new pyridine carboxamide complexes and self-assemblies with Tb(III), Eu(III), Zn(II), Cu(II) ions and their luminescent and magnetic properties. Issue 4 (16th February 2019)

• Record Type: Journal Article
• Authors: Kwiatek, Dorota; Kubicki, Maciej; Toliński, Tomasz; Ferenc, Wiesława; Lis, Stefan; Hnatejko, Zbigniew
• Is Part Of: Journal of coordination chemistry. Volume 72:Issue 4(2019)
• Page Start: 727
• Page End: 748
• Publication Date: 2019-02-16
• Subjects: Carboxamides -- metal complexes -- self-assemblies -- spectroscopy -- magnetic studies; Coordination compounds -- Periodicals; 541.2242
• DOI: 10.1080/00958972.2019.1574344
• Languages: English
• ISSNs: 0095-8972

Abstract

Abstract: In this study, we present eight new complexes and self-assemblies of Tb(III), Eu(III), Zn(II) and Cu(II) ions with novel pyridine carboxamides, L1 [methyl 4-methyl-3-(pyridine-4-carbonylamino)benzoate] and L2 [methyl 2-methyl-3-(pyridine-4-carbonylamino)benzoate], as heterocyclic ligands. Two luminescent and spatially organized coordination compounds were obtained with the use of the solvothermal synthesis method, (1 ) [Tb3 (L1)4 (BTC)3 (H2 O)3 ] (where BTC is benzene-1, 3, 5-tricarboxylic acid) and (5 ) [Eu(L2a)3 (H2 O)3 ](H2 O)4 . As a result of one pot reaction synthesis under reflux the d-electron metal ions and self-organization of ligands gave complexes (2 ) [Zn(L1)2 Cl2 ], (3 ) [Cu(L1)2 (SCN)2 (H2 O)], (4 ) [Cu(L1)2 Cl2 ], hybrid salt (6 ) [(CuCl4 ) 2- (L2b)2 2+ ](H2 O), (7 ) [Cu(L2)2 Cl2 ] and 1D-chain coordination polymer (8 ) [Cu(L2)2 (SCN)2 ]. Identification of the obtained compounds was performed on the basis of the excitation, emission, 1 H NMR, FT-IR spectra, luminescence lifetimes, SEM images, PXRD, single-crystal X-ray diffraction, MS, TGA and elemental analysis. Selected compounds were also analyzed in terms of their potential magnetic properties. Graphical Abstract: