Circular dichroism of heterochromophoric and partially regenerated purple membrane: Search for exciton coupling

Chirality ◽  
2005 ◽  
Vol 18 (2) ◽  
pp. 72-83 ◽  
Author(s):  
Elena Karnaukhova ◽  
Chrysoula Vasileiou ◽  
Andy Wang ◽  
Nina Berova ◽  
Koji Nakanishi ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Purple Membrane ◽  
Exciton Coupling ◽  
Circular Dichroïsm

Unique ultraviolet-visible and circular dichroism behavior due to exciton coupling in a biscyanine dye

1991 ◽  
Vol 113 (18) ◽  
pp. 7046-7047 ◽  
Author(s):  
Dario Gargiulo ◽  
Fadila Derguini ◽  
Nikolina Berova ◽  
Koji Nakanishi ◽  
Nobuyuki Harada
Keyword(s):  
Circular Dichroism ◽  
Exciton Coupling ◽  
Circular Dichroïsm

Transmission of Point Chirality to Axial Chirality for Strong Circular Dichroism in Triarylmethylium-o,o-dimers

Synlett ◽  
2018 ◽  
Vol 29 (16) ◽  
pp. 2147-2154 ◽  
Author(s):  
Takanori Suzuki ◽  
Yusuke Ishigaki ◽  
Tomohiro Iwai ◽  
Yuki Hayashi ◽  
Aiichiro Nagaki ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Solvent Effects ◽  
Chiral Auxiliaries ◽  
Response Properties ◽  
Axial Chirality ◽  
Exciton Coupling ◽  
Π Stacking ◽  
Circular Dichroïsm

Triarylmethylium-o,o-dimers adopt a twisted geometry so that two diarylmethyliums are stacked in a slipped manner. Thus, chiral auxiliaries on the aryl groups induce a preference in the axial chirality of the central biphenyl unit. Strong circular dichroism is attained through exciton coupling, which can be used for additional spectral output in their electrochromic behavior. Diastereoselectivity based on π–π stacking exhibits unique solvent effects, thus endowing multifunctional response properties.

scholarly journals Vibrational Circular Dichroism: Recent Advances for the Assignment of the Absolute Configuration of Natural Products

2015 ◽  
Vol 10 (10) ◽  
pp. 1934578X1501001 ◽  
Author(s):  
Eleuterio Burgueño-Tapia ◽  
Pedro Joseph-Nathan
Keyword(s):  
Natural Products ◽  
Circular Dichroism ◽  
Absolute Configuration ◽  
Aromatic Compounds ◽  
Vibrational Circular Dichroism ◽  
Exciton Coupling ◽  
Coupling Approach ◽  
The Absolute ◽  
Circular Dichroïsm

Vibrational circular dichroism (VCD) emerged during the last decade as a reliable tool for the absolute configuration (AC) determination of organic compounds. The principles, instrumentation, and methodology applied prior to early 2013 were recently reviewed by us. Since VCD is a very dynamic field, the aim of this review is to update VCD advances for the AC assignment of terpenoids, aromatic compounds, alkaloids, and other natural products for the 2013-2014 period, when VCD was applied to the AC assignment of some 70 natural products. In addition, although discovered in 2012, a brief introduction to the VCD exciton coupling approach and its applications in natural products AC assignment is presented.

Sign in / Sign up

Export Citation Format

Share Document