Polarizability tensor theory by Green’s function matrix: Circular dichroism and ultraviolet absorption band shape calculations of cyclo(Gly-Pro-Gly-D-Ala-Pro) having β- and γ-turns

1998 ◽  
Vol 108 (1) ◽  
pp. 93-108 ◽  
Author(s):  
Hirotoshi Ito
Keyword(s):  
Circular Dichroism ◽  
Absorption Band ◽  
Green’S Function ◽  
Green's Function ◽  
Ultraviolet Absorption ◽  
Polarizability Tensor ◽  
Band Shape ◽  
Tensor Theory ◽  
Circular Dichroïsm ◽  
Function Matrix

A Solution to the Artifact Problem in Fourier Transform Vibrational Circular Dichroism

1988 ◽  
Vol 42 (1) ◽  
pp. 32-38 ◽  
Author(s):  
Petr Malon ◽  
Timothy A. Keiderling
Keyword(s):  
Fourier Transform ◽  
Circular Dichroism ◽  
Vibrational Circular Dichroism ◽  
Band Shape ◽  
Ft Ir ◽  
Circular Dichroïsm

Using a newly constructed FT-IR vibrational circular dichroism (VCD) instrument, we have found that elimination of the ellipsoidal collection mirror before the detector and its replacement by a lens leads to a significant improvement in the absorption artifact problem seen previously in FT-IR/VCD. In the mid-IR region, we have been able to measure VCD of a single enantiomer for molecules such as α-pinene, 3-methylcyclohexanone, and dimethyltartrate. More importantly, this reduction in artifact level brings the FT-IR/VCD band shape of some particularly-difficult-to-measure bands, such as carbonyl stretches, into better agreement with those found in dispersive measurements. These results imply that the dispersive results are reliable, though of lower resolution than those obtained with the use of FT-IR/VCD.

A thin quartz cell suitable for vacuum ultraviolet absorption and circular dichroism measurements

1984 ◽  
Vol 136 (1) ◽  
pp. 247-250 ◽  
Author(s):  
Donald M. Gray ◽  
Dimitrij Lang ◽  
Ekkehard Kuner ◽  
Marilyn Vaughan ◽  
John Sutherland
Keyword(s):  
Circular Dichroism ◽  
Vacuum Ultraviolet ◽  
Ultraviolet Absorption ◽  
Circular Dichroïsm
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