Muon spin relaxation data analysis of spin crossover complexes
Correu electrònic de l'autorarnau.vendrellperezgmail.com
Tutor / director / avaluadorGarcia, Yann
Tipus de documentProjecte Final de Màster Oficial
Condicions d'accésAccés obert
MatèriesMetal complexes, Muons -- Spectra, Nuclear spin, Particles (Nuclear physics) -- Data processing, Spectrum analysis, Complexos metàl·lics, Muons -- Espectres, Espín nuclear, Partícules (Física nuclear) -- Processament de dades, Anàlisi espectral
ProvinençaThis project is directed at the analytical study of muon spin relaxation (SR) data recorded at ISIS (UK) on a set of spin crossover materials. The Fe(II) spin crossover compound [Fe(phen)2(NCS)2] (phen = 1,10-phenanthroline) was studied over the temperature range (4-293 K) and at several magnetic fields (Zero Field, Longitudinal Field and Transverse Field). Analysis of the SR data of this model compound provided a suitable introduction to the, sometimes, complex world of muon spin relaxation data. The project then developed by detailed analysis of data obtained by muon spectroscopy of a novel spin crossover chain compound whose formula is [Fe(hyetrz)3](p-bromophenylsulfonate)2 (hyetrz = 4-(2’-hydroxy-ethyl)-1,2,4-triazole). The muon findings were then compared with results from 57Fe Mössbauer spectroscopy experiments on the same compound. The data were fitted with appropriate relaxation functions to derive relevant parameters such as relaxation rates, the hyperfine coupling constant and the nature of muonic species was discussed to elucidate the spin crossover behaviour of this material. The main aim of the work presented in this Thesis is to provide a straightforward account of how to handle raw muon spin relaxation (SR) data from the muon ISIS facility. Production of such a comprehensive report would be useful for newcomers to the field, particularly the community of both inorganic and molecular chemists aiming to use this potentially useful technique in their field of investigation.