@phdthesis{Baia2002,
  author    = {Baia, Gheorghe Lucian},
  title     = {Theory and applications of confocal micro-Raman spectroscopy on hybrid polymer coatings and PDMS membranes and spectroscopic studies of doped B2O3-Bi2O3 glass systems},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-4606},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2002},
  abstract  = {The thesis consists of two major parts. The first part contains a theoretical-experimental study of confocal micro-Raman spectroscopy on hybrid polymer coatings and an application of this spectroscopic method on PDMS-membranes. The theoretical-experimental study includes the application of a model that describes the influence of the refraction effect on the focus length on confocal Raman experiments, and the development of a new model that additionally takes into account the effect of diffraction on the focus dimensions. A parallel comparison between these two theoretical approaches and experimental data has been also drawn and a better agreement between theory and experiment was observed, when both refraction and diffraction effects were considered. Further, confocal resonance micro-Raman spectroscopy has been applied to characterise the diffusion processes of pharmacologically relevant molecules (b-carotene dissolved in dimethylsulfoxide) through a polydimethylsiloxane (PDMS)-membrane. The diffusion rate as a function of the measurement depth and diffusion time as well as the concentration gradient under a steady flux have been determined. The measurements shown that the confocal micro-Raman technique is a powerful tool to investigate the kinetics of diffusion processes within a membrane before the steady state has been reached. The second part of the thesis contains infrared and Raman spectroscopic studies of copper and iron doped B2O3-Bi2O3 glass systems. These studies were performed to obtain specific data regarding their local structure and the role played by dopant ions on boron and bismuthate units. The changes of B2O3 and Bi2O3 structural units due to the relaxation of the amorphous structure, which was induced in these samples by the thermal treatment, were also evidenced.},
  language  = {en}
}
@phdthesis{Bolboaca2002,
  author    = {Bolboaca, Monica-Maria},
  title     = {Vibrational characterisation of coordination and biologically active compounds by means of IR absorption, Raman and surface-enhanced Raman spectroscopy in combination with theoretical simulations},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-4616},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2002},
  abstract  = {The thesis contains two major parts. The first part deals with structural investigations on different coordination compounds performed by using infrared absorption and FT-Raman spectroscopy in combination with density functional theory calculations. In the first section of this part the starting materials Ph2P-N(H)SiMe3 and Ph3P=NSiMe3 and their corresponding [(MeSi)2NZnPh2P-NSiMe3]2 and Li(o-C6H4PPh2NSiMe3)]2·Et2O complexes have been investigated in order to determine the influence of the metal coordination on the P-N bond length. In the next section the vibrational spectra of four hexacoordinated silicon(IV) and germanium(IV) complexes with three symmetrical bidentate oxalato(2-) ligands have been elucidated. Kinetic investigations of the hydrolysis of two of them, one with silicon and another one with germanium, have been carried out at room temperature and at different pH values and it was observed that the hydrolysis reaction occurs only for the silicon compound, the fastest reaction taking place at acidic pH. In the last section of this part, the geometric configurations of some hexacoordinated silicon(IV) complexes with three unsymmetrical bidentate hydroximato(2-) ligands have been determined. The second part of the thesis contains vibrational investigations of some biologically active molecules performed by means of Raman spectroscopy together with theoretical simulations. The SER spectra of these molecules at different pH values have also been analysed and the adsorption behaviour on the metal surface as well as the influence of the pH on the molecule-substrate interaction have been established.},
  subject      = {Komplexe},
  language  = {en}
}