High Resolution Magnetic Circular Dichroism and Absorption Spectra of Cs2ZrBr6:Ir4+

1972 ◽  
Vol 56 (6) ◽  
pp. 2668-2677 ◽  
Author(s):  
J. R. Dickinson ◽  
S. B. Piepho ◽  
J. A. Spencer ◽  
P. N. Schatz
Keyword(s):  
Circular Dichroism ◽  
High Resolution ◽  
Absorption Spectra ◽  
Magnetic Circular Dichroism ◽  
Circular Dichroïsm

THz SPECTROSCOPY OF PROTEINS IN WATER: DIRECT ABSORPTION AND CIRCULAR DICHROISM

2007 ◽  
Vol 17 (04) ◽  
pp. 709-718 ◽  
Author(s):  
JING XU ◽  
KEVIN W. PLAXCO ◽  
S. JAMES ALLEN
Keyword(s):  
Circular Dichroism ◽  
Absorption Spectra ◽  
Magnetic Circular Dichroism ◽  
Broad Band ◽  
Thz Spectroscopy ◽  
Direct Absorption ◽  
Frequency Range ◽  
Egg White Lysozyme ◽  
Terahertz Absorption ◽  
Circular Dichroïsm

Many of the functionally relevant collective vibrations of proteins and other biopolymers are expected to occur at terahertz frequencies. Precise absorption measurements combined with careful titration of biopolymers in water have allowed us to directly measure the terahertz absorption spectra associated with these motions, despite the strong background absorption of the solvent. We have also explored the circular dichroism spectroscopy of biomolecules over this same frequency range. Since circular dichroism requires the presence of net chirality in a molecule and chirality is present in nearly all biomaterial, it has the potential to capture the background free spectral features in biopolymers. To undertake these studies we have developed a broad band terahertz spectrometer suitable for both direct absorption and circular dichroism measurements of proteins in water between 0.75 – 3.72 THz. Direct terahertz absorption spectra of prototypical proteins bovine serum albumin (BSA) and hen egg white lysozyme have been documented and are described here. We have also successfully demonstrated the magnetic circular dichroism in semiconductors, and placed an upper bound on the terahertz circular dichroism signature of solvated BSA. In the terahertz frequency range, it appears that circular dichroism signatures are exceedingly small and detection remains a challenge.

scholarly journals Magnetic circular dichroism in the soft-x-ray absorption spectra of Mn-based magnetic intermetallic compounds

1997 ◽  
Vol 56 (10) ◽  
pp. 6021-6030 ◽  
Author(s):  
A. Kimura ◽  
S. Suga ◽  
T. Shishidou ◽  
S. Imada ◽  
T. Muro ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Intermetallic Compounds ◽  
Absorption Spectra ◽  
Magnetic Circular Dichroism ◽  
X Ray ◽  
X Ray Absorption ◽  
Circular Dichroïsm

Theory of Magnetic Circular Dichroism of the CeL2,3X-ray Absorption Spectra in Mixed Valence Vompound CeFe2

2004 ◽  
Vol 73 (7) ◽  
pp. 2008-2013 ◽  
Author(s):  
Kaname Asakura ◽  
Keiji Fukui ◽  
Haruhiko Ogasawara ◽  
Isao Harada ◽  
J. C. Parlebas ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Absorption Spectra ◽  
Magnetic Circular Dichroism ◽  
Mixed Valence ◽  
Circular Dichroïsm

Magnetic circular dichroism and absorption spectra of nickel(II) oxide

1972 ◽  
Vol 11 (11) ◽  
pp. 2627-2632 ◽  
Author(s):  
P. Brint ◽  
A. J. McCaffery ◽  
R. Gale ◽  
M. D. Rowe
Keyword(s):  
Circular Dichroism ◽  
Absorption Spectra ◽  
Magnetic Circular Dichroism ◽  
Circular Dichroïsm

Comparative study of spectroscopic properties of α- or β-butyloxy-substituted tribenzotetraazachlorin-fullerene conjugates

2009 ◽  
Vol 13 (10) ◽  
pp. 999-1005 ◽  
Author(s):  
Takamitsu Fukuda ◽  
Hironori Kaneko ◽  
Nagao Kobayashi
Keyword(s):  
Circular Dichroism ◽  
Comparative Study ◽  
Dft Calculations ◽  
Absorption Spectra ◽  
Magnetic Circular Dichroism ◽  
Nickel Chloride ◽  
Spectroscopic Properties ◽  
Band Shift ◽  
Chloride Dihydrate ◽  
Circular Dichroïsm

Mixed condensation of 1,2-dicyanofullerene (1) and 3,6-dibutyloxyphthalonitrile (2a) in the presence of nickel chloride dihydrate ( NiCl2·2H2O ) in quinoline forms an α-hexabutyloxy-substituted tribenzotetraazachlorin (TBTAC)-fullerene ( C 60) conjugate (3). UV-vis absorption and magnetic circular dichroism (MCD) properties of 3 have been obtained, and the results compared with those of the β-substituted isomer (4). Although the absorption spectra of 3 and 4 are similar in shape, a significant band shift to longer wavelength is observed for 3. According to the results of DFT calculations, the observed spectroscopic differences are ascribed to differences in the distribution of the MO amplitudes at the α- and β-positions of the TBTAC moiety.

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