Določitev aktivacijske energije razpada srebrovih(I) koordinacijskih spojin z lutidini s tehniko termogravimetrične analize

Krištof, Miha (author), Čelan Korošin, Nataša (mentor)

Opisan je eksperiment, v katerem sem sintetiziral bis(lutidin)srebrove(I) koordinacijske spojine iz AgNO3 in šestih lutidinov, pri katerih sta 2 metilni skupini na piridinu vezani na različnih položajih. Stabilnost teh kovinskih koordinacijskih spojin je opisana kot funkcija bazičnosti liganda, le-to pa sem primerjal z merjenjem mase razpada Ag(I) koordinacijskih spojin z lutidini s pomočjo izotermne termogravimetrične analize v inertni atmosferi, saj je reakcija razpada endotermni proces. Ob predpostavki, da razpad najbolje opiše enačba prvega reda, sem s pomočjo Arrheniusovega diagrama in Arrheniusove enačbe določil aktivacijske energije (Ea) reakcije razpada koordinacijskih spojin. S podatki, ki jih dobimo, si pomagamo določiti povezavo med aktivacijsko energijo, stabilnostjo koordinacijskih spojin in bazičnostjo liganda.

• Language: Slovenian
• Keywords: Srebrove(I) koordinacijske spojine, lutidini, kemijska kinetika, termična analiza, TGA, DSC
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FKKT - Faculty of Chemistry and Chemical Technology
• Year: 2023
• PID: 20.500.12556/RUL-149508
• COBISS.SI-ID: 162887939
• Publication date in RUL: 07.09.2023

Secondary language

• Language: English
• Title: Determination of the activation energy of the decomposition of silver(I) coordination compounds with lutidines by thermogravimetric analysis

Abstract

An experiment is described in which I synthesised bis(lutidine)silver(I) coordination compounds from AgNO3 and six lutidines with the 2 methyl groups on the pyridine at different positions. The stability of these metal complexes is described as a function of the basicity of the ligand. This was compared with the measurement of the mass loss of Ag(I) coordination compounds with lutidines by isothermal thermogravimetric analysis in an inert atmosphere since the decomposition reaction is an endothermic process. Assuming that the decomposition is best described by a first order equation, I have determined the activation energies (Ea) of the decomposition reaction of the coordination compounds using an Arrhenius diagram and the Arrhenius equation. The data obtained help to establish a connection between the activation energy, the stability of the coordination compounds and the basicity of the ligand.

• Keywords: Silver(I) coordination compounds, lutidines, chemical kinetics, thermal analysis, TGA, DSC