Structural Variety of Cobalt(II), Nickel(II), Zinc(II), and Cadmium(II) Complexes with 4,4'-Azopyridine: Synthesis, Structure and Luminescence Properties

Agnieszka Pladzyk; Łukasz Ponikiewski; Anna Dołęga; Klaudia Słowy; Agata Sokołowska; Katarzyna Dziubińska; Zbigniew Hnatejko

doi:10.1002/asia.201500652

Structural Variety of Cobalt(II), Nickel(II), Zinc(II), and Cadmium(II) Complexes with 4,4'-Azopyridine: Synthesis, Structure and Luminescence Properties

Chem Asian J. 2015 Nov;10(11):2388-96. doi: 10.1002/asia.201500652. Epub 2015 Aug 7.

Authors

Agnieszka Pladzyk¹, Łukasz Ponikiewski², Anna Dołęga², Klaudia Słowy², Agata Sokołowska², Katarzyna Dziubińska², Zbigniew Hnatejko³

Affiliations

¹ Department of Inorganic Chemistry, Gdańsk University of Technology, Narutowicza Str. 11/12, 80-233, Gdańsk, Poland. agnieszka.pladzyk@pg.gda.pl.
² Department of Inorganic Chemistry, Gdańsk University of Technology, Narutowicza Str. 11/12, 80-233, Gdańsk, Poland.
³ Department of Rare Earths, Adam Mickiewicz University in Poznań, Umultowska Str. 89b, 61-414, Poznań, Poland.

PMID: 26178314
DOI: 10.1002/asia.201500652

Abstract

Self-assembled bi- and polymetallic complexes of Co(II), Ni(II), Zn(II), and Cd(II) were obtained by the reaction of 4,4'-azopyridine (azpy) with metal tri-tert-butoxysilanethiolates (Co, 1; Cd, 2), acetylacetonates (Ni, 3; Zn, 4), and acetates (Cd, 5). All compounds were characterized by single-crystal X-ray structure analysis, elemental analysis, FTIR spectroscopy, and thermogravimetry. Complexes 1, 2 and 4, 5 exhibit diverse structural conformations: 1 is bimetallic, 2 and 4 are 1D coordination polymers, and 5 is a 2D coordination framework formed from bimetallic units. The obtained complexes contain metal atoms bridged by a molecule of azpy. The luminescent properties of 1-5 were investigated in the solid state.

Keywords: coordination complexes; crystal structures; luminescence; spectroscopic studies; structure elucidation.