Preparation, characterization and thermal behaviour of polymeric complex of cadmium hexamethylenetetramine nitrate

• Published in: Solid state sciences 2012-04, Vol.14 (4), p.495-500
• Main Authors: Kumar, Dinesh, Kapoor, I.P.S., Singh, Gurdip, Goel, Nidhi, Singh, Udai P.
• Format: Article
• Language: English
• Subjects: CHNC (cadmium hexamethylenetetramine nitrate complex); Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Hexamethylenetetramine; Ignition delay; Isothermal TG; Kinetics; Materials science; Organic compounds; Other materials; Physics; Specific materials; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; Thermal expansion; thermomechanical effects and density; Thermal properties of condensed matter; Thermal properties of crystalline solids; X-ray Crystallography
• ISSN: 1293-2558; 1873-3085
• DOI: 10.1016/j.solidstatesciences.2012.01.021

The preparation of cadmium nitrate complex with bridged hexamethylenetetramine-[{Cd(HMTA)(NO3)2(H2O)2}n], CHNC, of polymeric nature has been reported here for the first time. It was characterized by X-ray crystallography, 1H NMR, FT-IR and elemental analysis. The crystal structure is stabilized by hydrogen bonding between the oxygen atom of the nitrate group with the methyl hydrogen of HMTA and hydrogen of the coordinated water molecule via C–H⋯O and O–H⋯O interactions. The thermolysis of this complex was investigated by TG-DSC and ignition delay measurements. The model-free isoconversional and model-fitting kinetic approaches have been applied to isothermal TG data for kinetics investigation of thermal decomposition of the complex. At higher temperatures, the complex gets ignited to produce highly thermally stable residue most closely resembles CdO proved by XRD. [Display omitted]