Síntese e caracterização estrutural de polímeros de coordenação contendo ligantes mistos

Abstract

In this work two new coordination polymers were synthesized, {[Zn(SIP)(H2O)4]K}n (Zn-SIP), {[Ag(INH)2]SIP}n (Ag-SIP) and a metal complex [Zn(INH)2)(H2O)4][1,5-NDS]∙H2O (Zn-NDS). For the synthesis of these compounds to the methodology of mixed binders was used. Binders used were sodium salt of 5-sulpho-1,3-benzenedicarboxylic acid (SIP), 1,5-naphthalenedisulfonic acid (1,5-NDS) and pyridine-4-carbohydrazide (INH). The chemical characterization of the elements obtained through the elementary analysis techniques of C, H and N, infrared spectroscopy and Raman spectroscopy. The structural characterization was performed using the X-ray diffraction by single crystal. The Zn-SIP and Zn-NDS belong to the monoclinic crystal system and the space group P21/n and the Ag-SIP belongs to the monoclinic crystal system and space group P21/c. A structural solution of the Ag-SIP polymer revealed an occurrence of positional disorder in two oxygen atoms of the SIP sulfonate group, with occupancy of 68:32. For the coordination polymers, a topological description was also performed, which revealed that Zn-SIP is composed of a 3D, binodal (4,6)-connected network that can be described with the point symbol (44∙610∙8)(44∙62). This network is presented in a two-dimensional, uninodal 4-connected subnet that can be described with the symbol of the point (44∙62), being classified as a flat square network of type sql/Shubnichov. The topological description of Ag-SIP reveals that this compound is composed of a 2D, uninodal 4-connected network and can be described with a point symbol (44∙62), classified as a flat tetragonal network of sql type.