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Characterization of Materials by Raman Scattering

100%
Kozielski M.
Acta Physica Polonica A
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2007
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vol. 111
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issue 3
343-360
EN
The paper reports on the use of phonon spectra obtained with the Raman spectroscopy for characterization of different materials. The Raman scattering spectra obtained for zinc selenide crystals, mixed crystals zinc selenide admixtured with magnesium or beryllium, oxide crystals including strontium lanthanum gallate, molecular crystals of triammonium hydrogen diseleniate and a homologous series of polyoxyethylene glycols are analysed.
2
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Photoacoustic Study of the Interaction Between Thin Oil Layers with Water

100%
Szurkowski J., Pawelska I., Wartewig S., Pogorzelski S.
Acta Physica Polonica A
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2000
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vol. 97
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issue 6
1073-1082
EN
In the presented paper the structural changes in thin olive oil layers taking place as a result of interaction with water using a photoacoustic technique were studied. The oil layers were spread from a solution in a volatile solvent (ethyl ether) on the water and copper surface. These studies are a natural continuation of the previous work on a layered system performed within the light range (680 nm), which pointed to the irregularities of oil layers related to their thickness is now expanded to the infrared band. A structural irregularity was observed for a layer thickness of 100 μm, but it did not appear for the one of pure bulk oil. Signatures of irregularity were clearly observed in the phase plots whereas the amplitude dependences were not sensitive to them. The performed studies allowed one to relate the diversity of thermal parameters in the samples with structural changes found in oil layers originated from oil-water interactions.
3
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The Interaction of Water with Glycine: A Combined Inelastic Neutron Scattering and Raman Spectra Studies

100%
Zhang P., Zhang Y., Han S., Yan Q., Li J.
Acta Physica Polonica A
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2006
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vol. 109
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issue 3
399-404
EN
The vibrational dynamics of water around glycine was investigated by using Raman spectroscopy and inelastic neutron scattering. Experiments of deuterated glycine versus deuterium were performed as comparison. The study shows that for glycine, the exchange of proton-deuteron on the active NH_3^+ side was easy, whereas there was hardly exchange on the CH_2 side. Comparing different proportion of glycine vs. water molecules we obtained that the presence of water hardly changes the main features of glycine illustrating its hydrophobic character. The intralayer hydrogen bonds of glycine crystal are difficult to be replaced due to its stronger bond than water.
4
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Characterisation of Materials by Raman Scattering, ADDENDA

100%
Kozielski M.
Acta Physica Polonica A
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2008
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vol. 114
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issue 4
925-926
EN
This paper contains an erratum to [M. Kozielski, Acta Phys. Pol. A, 111 343 (2007)].
5
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Spectroscopic Study of the Dimerization Process οf Iron Protoporphyrin IX

100%
Dziedzic-Kocurek K., Byrne H., Świderski A., Stanek J.
Acta Physica Polonica A
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2009
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vol. 115
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issue 2
552-555
EN
The commercial protoporphyrin IX, iron-ferriprotoporphyrin IX-chloride and synthesized iron porphyrin μ-oxo-dimers were examined by UV/vis absorption and fluorescence, Fourier transformed infrared spectroscopy, resonance Raman, X-ray absorption, Mössbauer spectroscopy and SQUID. The evidence of Fe-O-Fe antiferromagnetic coupling concluded from SQUID and Mössbauer in the case of samples containing dimerized forms confirmed the presence of the oxo-bridges. In this paper the results of UV/vis, fluorescence, Fourier transform infrared FTIR and Raman spectroscopies are reported and discussed. The study is based on the comparison of the free-base protoporphyrin IX, Fe-PPIX-Cl and the synthesized dimerized specimen. The vibrational modes in two energy regions i.e. 330-650 cm^{-1} and 750-900 cm^{-1}, reportedly characteristic of the existence of Fe-O-Fe bridges, are discussed. A significant photoluminescence emission, strongly Stokes shifted from the Soret band, absent in the protoporphyrin IX and the iron-ferriprotoporphyrin IX-chloride, is observed. The strong Stokes shift and the mismatch of the excitation spectrum to the Soret band suggest that is does not have origin in the de-excitation of the porphyrin moiety and that it could have origin in an Fe-O-Fe charge transfer state.
6
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Excess thermodynamic quantities of D2O water calculated from its Raman O−D stretching spectra

75%
Georgiev M., Goutev N., Nickolov Z., Georgiev G.
Open Physics
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2005
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vol. 3
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issue 1
104-114
EN
Excess thermodynamic functions of D2O water have been calculated from the vibrationally decoupled O−D stretching spectra of very dilute solutions of HOD in H2O. Comparison of the results with reference calorimetric data for water showed a good correspondence for excess heat capacity above the melting point of ice. The excess enthalpy at the melting point also coincides well with latent heat of melting.
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