scholarly journals Competition between inter and intramolecular hydrogen bond evidenced by vibrational circular dichroism spectroscopy: The case of (1 S ,2 R )‐(−)‐ cis ‐1‐amino‐2‐indanol

Chirality ◽  
2021 ◽  
Author(s):  
Katia Le Barbu‐Debus ◽  
Anne Zehnacker
Keyword(s):  
Hydrogen Bond ◽  
Circular Dichroism ◽  
Intramolecular Hydrogen Bond ◽  
Circular Dichroism Spectroscopy ◽  
Vibrational Circular Dichroism ◽  
Intramolecular Hydrogen ◽  
Circular Dichroïsm

Vibrational Circular Dichroism of Proline-Containing Oligopeptides

1996 ◽  
Vol 50 (5) ◽  
pp. 644-648 ◽  
Author(s):  
Mitsuhiro Miyazawa ◽  
Katsuhiko Inouye ◽  
Tadao Hayakawa ◽  
Yoshimasa Kyogoku ◽  
Hiromu Sugeta
Keyword(s):  
Hydrogen Bond ◽  
Circular Dichroism ◽  
Vibrational Circular Dichroism ◽  
Type Ii ◽  
Dilute Solutions ◽  
Infrared Absorption Spectra ◽  
High Concentrations ◽  
Intramolecular Hydrogen ◽  
Circular Dichroïsm ◽  
Hydrogen Bonded

Vibrational circular dichroism (VCD) and infrared absorption spectra in the amide A region of blocked oligopeptides containing proline have been obtained in apolar organic solvents in order to clarify the characteristic VCD for the intramolecularly hydrogen-bonded NH stretching involved in the turn structures of peptide chains as well as the intermolecularly hydrogen-bonded NH stretching in associated molecules. The γ-turn with the intramolecularly hydrogen-bonded C7 conformation exhibits a characteristic positive VCD band at about 3330 cm−1 in dilute solutions of Piv-Pro-NHMe and Ac-Pro-NHMe. The intramolecularly hydrogen-bonded NH stretching in the type II β-turn with C10 conformation gives rise to a positive VCD band at 3345 cm−1 for Piv-Pro-Gly-NHMe. The Gly NH group of Piv-Pro-Gly-OMe and Ac-Pro-Gly-OMe in dilute solutions assumes C7C5 conformation stabilized by a bifurcated three-center intramolecular hydrogen bond and exhibits a positive VCD band near 3300 cm−1 at a lower frequency than the intermolecularly hydrogen-bonded band. All the peptides studied give a characteristic negative—positive bisignate couplet from the high wavenumber side for the intermolecularly hydrogen-bonded NH stretching band at high concentrations.

Determination of absolute configuration using vibrational circular dichroism spectroscopy: The chiral sulfoxide 1-thiochromanone S-oxide

Chirality ◽  
2002 ◽  
Vol 14 (5) ◽  
pp. 400-406 ◽  
Author(s):  
F.J. Devlin ◽  
P.J. Stephens ◽  
P. Scafato ◽  
S. Superchi ◽  
C. Rosini
Keyword(s):  
Circular Dichroism ◽  
Absolute Configuration ◽  
Circular Dichroism Spectroscopy ◽  
Vibrational Circular Dichroism ◽  
Determination Of Absolute Configuration ◽  
Circular Dichroïsm

Sol-gel phase transition of brucine-appended porphyrin gelator: a study by vibrational circular dichroism spectroscopy

2002 ◽  
Vol 13 (24) ◽  
pp. 2661-2666 ◽  
Author(s):  
Vladimı́r Setnička ◽  
Marie Urbanová ◽  
Statis Pataridis ◽  
Vladimı́r Král ◽  
Karel Volka
Keyword(s):  
Phase Transition ◽  
Circular Dichroism ◽  
Sol Gel ◽  
Circular Dichroism Spectroscopy ◽  
Vibrational Circular Dichroism ◽  
Gel Phase ◽  
Circular Dichroïsm
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