Circular dichroism spectroscopic study of non-covalent interactions of poly-L-glutamic acid with a porphyrin derivative in aqueous solutions

2005 ◽  
Vol 11 (9) ◽  
pp. 536-545 ◽  
Author(s):  
Lukáš Palivec ◽  
Marie Urbanová ◽  
Karel Volka
Keyword(s):  
Circular Dichroism ◽  
Aqueous Solutions ◽  
Glutamic Acid ◽  
Spectroscopic Study ◽  
Porphyrin Derivative ◽  
Non Covalent Interactions ◽  
Circular Dichroïsm ◽  
Covalent Interactions

scholarly journals A Raman, SERS and UV-circular dichroism spectroscopic study of N-acetyl-l-cysteine in aqueous solutions

2019 ◽  
Vol 43 (38) ◽  
pp. 15201-15212 ◽  
Author(s):  
R. A. Cobos Picot ◽  
M. Puiatti ◽  
A. Ben Altabef ◽  
R. J. G. Rubira ◽  
S. Sanchez-Cortes ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Circular Dichroism ◽  
Aqueous Solutions ◽  
Spectroscopic Study ◽  
Electronic Properties ◽  
Structural Properties ◽  
Amine Groups ◽  
Circular Dichroïsm

The aim of this work is to evaluate the vibrational and structural properties of N-acetyl-l-cysteine (NAC), and its molecular structure and electronic properties in relation to the action of thiol and amine groups at different pH.

The important role of non-covalent interactions for the vibrational circular dichroism of lactic acid in aqueous solution

2021 ◽  
Author(s):  
Sascha Jähnigen ◽  
Daniel Sebastiani ◽  
Rodolphe Vuilleumier
Keyword(s):  
Lactic Acid ◽  
Circular Dichroism ◽  
Computational Study ◽  
Bulk Water ◽  
Vibrational Circular Dichroism ◽  
Ab Initio Molecular Dynamics ◽  
Non Covalent Interactions ◽  
Circular Dichroïsm ◽  
Covalent Interactions

We present a computational study of vibrational circular dichroism (VCD) in solutions of (S)-lactic acid, relying on ab initio molecular dynamics (AIMD) and full solvation with bulk water. We discuss...

Preparation of Polypeptide-Dye Multilayers by an Electrostatic Assembly Process

1994 ◽  
Vol 351 ◽  
Author(s):  
Thomas M. Cooper ◽  
L. Campbell Angela ◽  
Carol Noffsinger ◽  
Janelle Gunther-Greer ◽  
Robert L. Crane ◽  
...  
Keyword(s):  
Thin Films ◽  
Circular Dichroism ◽  
Glutamic Acid ◽  
Congo Red ◽  
Copper Phthalocyanine ◽  
Electrostatic Assembly ◽  
Amino Silane ◽  
Spectrum Characteristic ◽  
Circular Dichroïsm ◽  
Β Sheet

ABSTRACTTo develop novel optical thin films, we have prepared self-assembled polypeptide films by an electrostatic process. The films were placed on a glass slide previously silanized by an amino silane and given a positive charge by immersion in aqueous acid. Subsequent immersion of the slide in aqueous anionic solutions of either poly(L-glutamic acid), congo red, copper phthalocyanine tetrasulfonic acid or p-nitroaniline-modified poly(L-glutamic acid) resulted in deposition of the anions on the surface. Following anionic immersion, the slides were dipped into a cationic poly(L-lysine) solution. Alternate dipping into anionic and cationic solutions yielded multilayers. The thin films were characterized by optical absorption and circular dichroism. The optical density increased with dipping cycles. Circular dichroism measurements of the thin films showed induced dichroism of the congo red and phthalocyanine-containing films, suggesting formation of a locally ordered dye-polypeptide complex. Solution circular dichroism measurements of the polypeptides indicated a coil conformation, while poly(Lglutamic acid)/poly(L-lysine) complexes showed circular dichroism spectrum characteristic of a β-sheet.

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