Errors in infra-red absorption analysis due to solute-solvent interactions. II

2007 ◽  
Vol 10 (7) ◽  
pp. 277-281 ◽  
Author(s):  
W. R. Ward
Keyword(s):  
Absorption Analysis ◽  
Solvent Interactions ◽  
Infra Red

Determination of Tetrahedral Aluminium in Mica by Infra-Red Absorption Analysis

Nature ◽  
1960 ◽  
Vol 185 (4710) ◽  
pp. 374-375 ◽  
Author(s):  
R. J. P. LYON ◽  
W. M. TUDDENHAM
Keyword(s):  
Absorption Analysis ◽  
Infra Red

Real Time Infra-Red Absorption Analysis of Nitridation of GaAs(001) by Hydrazine Solutions

2013 ◽  
Vol 160 (4) ◽  
pp. H229-H236 ◽  
Author(s):  
D. Paget ◽  
V. L. Berkovits ◽  
V. P. Ulin ◽  
F. Ozanam ◽  
P. Dumas ◽  
...  
Keyword(s):  
Real Time ◽  
Absorption Analysis ◽  
Infra Red

Solvent effects in infra-red spectroscopy

1958 ◽  
Vol 248 (1253) ◽  
pp. 169-182 ◽  
Keyword(s):  
Gas Phase ◽  
Potential Energy Function ◽  
Small Perturbations ◽  
Solvent Interactions ◽  
Anharmonic Constant ◽  
Second Derivatives ◽  
Infra Red ◽  
Vibrational Bands ◽  
Solvent Shifts ◽  
Derivatives Of

The effects of solute-solvent interactions on the vibrational spectrum of a dissolved molecule are evaluated by supposing that the interaction energy U can be expanded as a power series in the normal co-ordinates of the active molecule. By treating U and the anharmonic terms in the potential energy function of the free molecule as small perturbations to the harmonic oscillator Hamiltonian, the solvent shifts, ∆ ω , in the vibrational frequencies are found to be proportional to ( U" — 3 U' A / ω e ), where U' and U" are the first and second derivatives of U with respect to the normal co-ordinates and A / ω e is an anharmonic constant obtainable from the spectrum of the gas. The theory indicates that ∆ ω / ω is independent of isotopic sub­stitution as well as of the order of the transition; experimental data for HCl and DCl support these conclusions. The intensities of vibrational bands of dissolved molecules are shown to be proportional to a factor involving the refractive index of the solvent and to be dependent upon the derivatives with respect to the normal co-ordinates of the dipole moment of the solute molecule and its near neighbours. It is predicted that for diatomic molecules the intensity of the ( n — 1)th overtone, ( A s ) 0, n' is related to the frequency ω so that ( A s ) 0, n / ω n +1 is independent of isotopic substitution, as in the gas phase.

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