New complexes of 2-(4-pyridyl)-1,3-benzothiazole with metal ions; synthesis, structural and spectral studies

Add time:07/13/2019    Source:sciencedirect.com

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)2Co{(μ-OAc)2Co(p-PBT)3}2](PF6)(CH3OH) (3), [UO2(p-PBT)(NO3)2] (4), [Sm(p-PBT)(Cl)3(H2O)2]·7H2O (5), [Eu(p-PBT)(bac)3(H2O)2]·4H2O (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.

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