scholarly journals Vibrational spectral studies of solutions at elevated temperatures and pressures. X. Raman spectral study of aqueous cadmium bromide solutions at 25 and 200�C

1988 ◽  
Vol 17 (8) ◽  
pp. 763-775 ◽  
Author(s):  
Bruce G. Anderson ◽  
D. E. Irish
Keyword(s):  
Spectral Study ◽  
Elevated Temperatures ◽  
Spectral Studies ◽  
Cadmium Bromide ◽  
Raman Spectral ◽  
Bromide Solutions

Raman spectral studies of aqueous zinc bromide solutions to 300�C at pressures of 9 MPa

1988 ◽  
Vol 17 (8) ◽  
pp. 751-762 ◽  
Author(s):  
Mary M. Yang ◽  
David A. Crerar ◽  
Donald E. Irish
Keyword(s):  
Spectral Studies ◽  
Zinc Bromide ◽  
Raman Spectral ◽  
Bromide Solutions

Vibrational spectral studies of solutions at elevated temperatures and pressures. 11. A Raman spectral study of aqueous iron(III) chloride solutions between 25 and 300 °C

1989 ◽  
Vol 67 (3) ◽  
pp. 517-524 ◽  
Author(s):  
Katsuo Murata ◽  
Donald E. Irish ◽  
Gerald E. Toogood
Keyword(s):  
Raman Spectroscopy ◽  
Dielectric Constant ◽  
Dominant Species ◽  
Elevated Temperatures ◽  
Spectral Studies ◽  
Iron Species ◽  
Chloride Solutions ◽  
Increasing Temperature ◽  
Raman Spectral ◽  
Temperature Factors

The Raman spectra of acidified aqueous iron(III) chloride solutions have been measured between 25 and 300 °C. When Fe3+ concentrations are in the range 0.75 to 1.0 mol kg−1 and Cl−/Fe3+ ratios, R, in the range 3 to 9.5, the dominant species at 25 °C is trans-[Fe(H2O)4Cl2]+; at 300 °C the sole iron-containing species is tetrahedral [Formula: see text]. Conversion of [Fe(H2O)4Cl2]+ into [Formula: see text] appears not to involve intermediate iron species. In the presence of excess chloride the reaction [Formula: see text] is presumed to occur; ΔH for this reaction has been estimated as +65 ± 8 kJ mol−1. In addition to increasing temperature, factors which favour [Formula: see text] over other iron species include increasing acidity, increasing R, and decreasing dielectric constant. Keywords: high temperature aqueous solutions, iron(III) chloride, Raman spectroscopy.

Vibrational Spectral Studies of Solutions at Elevated Temperatures and Pressures. III. A Furnace Assembly for Raman Spectral Studies to 300°C and 15 MPa

1982 ◽  
Vol 36 (2) ◽  
pp. 137-140 ◽  
Author(s):  
D. E. Irish ◽  
T. Jarv ◽  
C. I. Ratcliffe
Keyword(s):  
High Temperature ◽  
Aqueous Solutions ◽  
Elevated Temperatures ◽  
Chemical Processes ◽  
Spectral Studies ◽  
Raman Spectral

The design of a furnace assembly for maintaining aqueous solutions at temperatures up to 300°C and controlled pressures of up to 15 MPa is described. The apparatus is being used to monitor the chemical processes taking place in high-temperature aqueous solutions. Spectra of the Zn(NO3)2/H2O system and the HCl/H2O system are presented as examples.

Raman spectral studies of solutions at elevated temperatures and pressures.13. Sodium formate – water

1993 ◽  
Vol 71 (10) ◽  
pp. 1728-1733 ◽  
Author(s):  
Richard J. Bartholomew ◽  
Donald E. Irish
Keyword(s):  
Raman Spectra ◽  
Elevated Temperatures ◽  
Sodium Formate ◽  
Fermi Resonance ◽  
Spectral Studies ◽  
Coupling Constant ◽  
Ambient Conditions ◽  
Modes Of Vibration ◽  
Resonance Doublet ◽  
Raman Spectral

Raman spectra of the formate anion in water (H2O and D2O) have been measured for four concentrations under ambient conditions and for two concentrations at temperatures ranging from 49 to 239 °C and a pressure of 10 MPa. Five of the six fundamental modes of vibration are polarized. This result is inconsistent with C2ν symmetry. The Fermi resonance doublet clearly results from the interaction of 2ν5 and ν1. The latter mode decreases in frequency as the temperature rises, thus increasing the coupling and hence the intensity of the 2ν5 component. The coupling constant, W, and the positions of the unperturbed bands [Formula: see text] and [Formula: see text] have been calculated. No evidence to support a bifurcated structure for the solvated anion was found.

Raman spectral study of the Mg(ClO4)2NaNCSH2O system at ambient and elevated temperatures

1989 ◽  
Vol 20 (8) ◽  
pp. 523-528 ◽  
Author(s):  
A. Antić-Jovanović ◽  
M. Jeremić ◽  
M. Lalić ◽  
D. A. Long
Keyword(s):  
Spectral Study ◽  
Elevated Temperatures ◽  
Raman Spectral

Laser biomodulation in bone implants: a Raman spectral study

2002 ◽  
Author(s):  
Cibelle Lopes ◽  
Sokki Sathaiah ◽  
Antonio L. B. Pinheiro ◽  
Janaina Duarte ◽  
Airton A. Martin ◽  
...  
Keyword(s):  
Spectral Study ◽  
Bone Implants ◽  
Raman Spectral
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