Understanding the Spectroscopic Properties of the Photosynthetic Reaction Center ofRhodobacter sphaeroidesby a Combined Theoretical Study of Absorption and Circular Dichroism Spectra

2009 ◽  
Vol 113 (30) ◽  
pp. 10055-10058 ◽  
Author(s):  
Yanliang Ren ◽  
Wei Ke ◽  
Yongjian Li ◽  
Lingling Feng ◽  
Jian Wan ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Reaction Center ◽  
Theoretical Study ◽  
Photosynthetic Reaction Center ◽  
Spectroscopic Properties ◽  
Circular Dichroism Spectra ◽  
Circular Dichroïsm

The chiroptical properties of the strychnine alkaloids: strychnine, β-colubrine, brucine, and their dihydro derivatives

1978 ◽  
Vol 56 (9) ◽  
pp. 1222-1230 ◽  
Author(s):  
Julian W. Show ◽  
Thomas M. Hooker Jr.
Keyword(s):  
Circular Dichroism ◽  
Spectroscopic Properties ◽  
Ultraviolet Absorption ◽  
Electronic Transitions ◽  
Ultraviolet Region ◽  
Circular Dichroism Spectra ◽  
Experimental Conditions ◽  
Chiroptical Properties ◽  
Circular Dichroïsm

Ultraviolet absorption and circular dichroism spectra of the strychnine alkaloids strychnine, β-colubrine, brucine, dihydrostrychnine, dihydro-β-colubrine, and dihydrobrucine have been investigated under various experimental conditions. It appears that at least five electronic transitions are required to account for the spectroscopic properties of these molecules in the ultraviolet region above 190 nm. Transitions, which are tentatively assigned as the 1Lb, 1La, 1Bb, and 1Ba in the notation due to Platt, and an n → π* transition apparently make significant contributions to the spectra of ail of the molecules studied.

Synthesis and spectroscopic properties of chiral bornane[2,3-b]pyrazino-fused [30]trithiadodecaazahexaphyrins

2014 ◽  
Vol 18 (10n11) ◽  
pp. 1014-1020 ◽  
Author(s):  
Maksim S. Filatov ◽  
Olga N. Trukhina ◽  
M. Salomé Rodríguez-Morgade ◽  
Mikhail K. Islyaikin ◽  
Oscar I. Koifman ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Spectroscopic Properties ◽  
Mirror Image ◽  
Circular Dichroism Spectra ◽  
Analytical Column ◽  
Optical Rotations ◽  
Circular Dichroïsm ◽  
Identification And Characterization

First chiral bornane[2,3-b]pyrazino-fused [30]trithiadodecaazahexaphyrins were prepared by a crossover condensation of R-(+)- or S-(–)-bornane[2′,3′-b]-2,3-dicyanopyrazine and 2,5-diamino-1,3,4-thiadiazole using two different methods. R-(+)- and S-(–)-enantiomers were characterized by their optical rotations and circular dichroism spectra, showing a mirror image relationship with respect to [θ] = 0. Regioisomers with C1 and C3 symmetry of R-(+)-[30]trithiadodecaazahexaphyrin have been separated using HPLC CHIRALPACK IC analytical column, allowing their unambiguous identification and characterization.

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