名称:
New complexes of 2-(4-pyridyl)-1,3-benzothiazole with metal ions; synthesis, structural and spectral studies
摘要:
Reactions of the metal ions (Co(II), UO2(II), Sm(III), Eu(III) and Zn(II)) with the (2-(4-pyridyl)-1,3-benzothiazole (p-PBT) and (2-(4-pyridyl)-1,3-benzothiazole N-oxide (N-O-p-PBT) ligands lead to new complexes of the following types: [Co(p-PBT)(2)(SCN)(2)] (1), [Co(p-PBT)(2)(dca)(2)](MeOH) (2), [(p-PBT)(2)Co{(mu-OAc)(2)Co(p-PBT)(3)}(2)](PF6)(CH3OH) (3) , [UO2(p-PBT)(NO3)(2)] (4), [Sm(p-PBT)(Cl)(3)(H2O)(2)]-7H(2)O (5), [Eu(p-PBT) (bac)(3)(H2O)(2)]center dot 4H(2)O (6), [Zn(p-PBT)(2)(acac)(2)] (7), [UO2 (p-PBT)(acac)(2)] (8), [UO2(N-O p-PBT)(acac)(2)] (9). The structures of these complexes were characterized by elemental analysis, FT-IR spectroscopy and for 3, 7, 8, and 9 compounds by X-ray crystallography. The experimental data revealed that the metal ions are coordinated with the co-ligands via the N-, S- and O-donor atoms, whereas the p-PBT ligand coordinates exclusively through its pyridyl nitrogen atom. The photoluminescence properties of samarium and europium complexes were studied. (C) 2018 Elsevier Ltd. All rights reserved.