Raman Spectroscopic Study of Ba2+-Surfactant Interactions in Aqueous Monodisperse Alkylpolyoxyethylene Surfactant Solutions

1993 ◽  
Vol 47 (11) ◽  
pp. 1784-1787
Author(s):  
Diana C. W. Siew ◽  
Ralph P. Cooney ◽  
Michael J. Taylor
Keyword(s):  
Conformational Changes ◽  
Influencing Factor ◽  
Difference Spectroscopy ◽  
Raman Spectroscopic ◽  
Chain Component ◽  
Raman Spectroscopic Study ◽  
Surfactant Solutions ◽  
Surfactant Complex ◽  
Surfactant Interactions ◽  
The Stability

Aqueous monodisperse alkylpolyoxyethylene surfactant-Ba2+ systems were investigated to clarify the coordination effects between the polyether chain and the cation which have been previously identified in polydisperse alkylphenoxy- and alkypolyoxyethylene surfactant systems. The coordination effects are simplified in the present study due to the presence of only a single polyether chain component. Formation of the surfactant complex resulted in conformational changes of the polyether chain which were monitored by Raman difference spectroscopy and curve fitting. The present studies confirm that surfactant-complex formation is dependent upon the polyether chain adopting the TGT-TĜT conformation and that the stability of the complex increases with the number of filled chain sites. The length of the polyether chain is also an influencing factor.

Raman spectroscopic study of conformational changes in the amorphous phase of poly(lactic acid) during deformation

Polymer ◽  
2004 ◽  
Vol 45 (12) ◽  
pp. 4241-4248 ◽  
Author(s):  
Xiaozhen Yang ◽  
Shuhui Kang ◽  
Yuning Yang ◽  
Kaoru Aou ◽  
Shaw Ling Hsu
Keyword(s):  
Lactic Acid ◽  
Spectroscopic Study ◽  
Amorphous Phase ◽  
Conformational Changes ◽  
Poly Lactic Acid ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study

Laser Raman spectroscopic study of water in gelatin-surfactant solutions and gels

1999 ◽  
Vol 277 (7) ◽  
pp. 666-672 ◽  
Author(s):  
S. Maity ◽  
S. S. Jena ◽  
A. Pradhan ◽  
H. B. Bohidar
Keyword(s):  
Spectroscopic Study ◽  
Raman Spectroscopic ◽  
Laser Raman ◽  
Raman Spectroscopic Study ◽  
Surfactant Solutions

Raman spectroscopic study of the conformational changes of thyroxine induced by interactions with phospholipid

2002 ◽  
Vol 31 (6) ◽  
pp. 448-453 ◽  
Author(s):  
Rosa Álvarez ◽  
Carlos Della Védova ◽  
Hans-Georg Mack ◽  
Ricardo Farías ◽  
Peter Hildebrandt
Keyword(s):  
Spectroscopic Study ◽  
Conformational Changes ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study

scholarly journals The Behavior of NH3+ Torsional Vibration in Amino Acids: A Raman Spectroscopic Study

Crystals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 517
Author(s):  
André Luís de Oliveira Cavaignac ◽  
Ricardo Jorge Cruz Lima ◽  
Paulo Tarso Cavalcante Freire
Keyword(s):  
Crystal Structure ◽  
Amino Acids ◽  
Hydrogen Bonds ◽  
Geometric Parameters ◽  
Positive Slope ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Arginine Hydrochloride ◽  
Temperature Lattice ◽  
The Stability

In this work we present the continuation of studies carried out on the changes of geometric parameters of the hydrogen bonds in amino acid crystals subjected to temperature or pressure variations. Changes in geometric parameters of the hydrogen bonds are correlated with the temperature behavior of the Raman wavenumber of NH3+ torsional band. Now four monocrystals, L-valine, L-isoleucine, taurine, and L-arginine hydrochloride monohydrate, are studied. Temperature evolution of the Raman wavenumber of NH3+ torsional band, with positive slope (dν/dT = 0.023 cm−1/K) of L-isoleucine, can be related to the stability of the crystal structure and the hydrogen bonds strengths on heating due to different temperature lattice parameters variation.

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