Solid-state conversion of thallium(I) coordination polymer nanoparticles with cubic cage units to an organometallic silver(I) coordination polymer

摘要

Solid-state structural transformation of three-dimensional Tl(I) coordination polymer nanoparticles with cubic cage Tl4O4unit, prepared by sonochemical procedure, to three-dimensional organometallic Ag(I) coordination polymer nanostructures has been observed upon mechanochemical reaction of compound [Tl4(μ8-B-4-hps)2]n(1), [H2B-4-hps?=?bis(4-hydroxyphenyl) sulfone] with AgNO3. During this conversion, compound2with higher symmetry in its unit cell is formed. Although B-4-hps2-in both compounds hasμ8coordination modes but these two modes are different from each other. These nanostructures were characterized by Scanning Electron Microscopy (SEM). IR spectroscopy, X-ray powder diffraction (XRD) and thermo gravimetry and differential thermal analyses (TG-DTA), indicated that this conversion is irreversible. The irreversibility of this transformation is due to the formation of stronger Ag-O and Ag-C bonds (in2) in comparison with initial Tl-O bonds in1.