Repozytorium
Wyszukaj
Kolekcje
Inne
Effect of elevated temperature and UV radiation on molecular structure of linoleic acid by ATR-IR and two-dimensional correlation spectroscopy.
Autorzy
Rok wydania
2020
Czasopismo
Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy
Numer woluminu
238
Strony
118436/1-118436/8
DOI
10.1016/j.saa.2020.118436
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
The effect of elevated temperature (44 °C) and ultraviolet (UV) radiation on molecular structure of linoleic acid (LA) was studied by Attenuated Total Reflection Infrared (ATR-IR) spectroscopy. To obtain more detailed information on molecular mechanism of these changes we applied moving-window analysis and two-dimensional correlation spectroscopy (2DCOS). Analysis of the time-dependent ATR-IR spectra of LA before and after UV irradiation revealed the structural changes in molecules of LA. The extent of these changes was significantly higher after an application of UV radiation. During 24 h experiment temperature was constant, therefore the spectral changes result from relatively slow processes (and requiring more energy), e.g. cis/trans isomerization, disruption of the C=C double bonds and partial breaking of hydrogen bonds in the cyclic dimers. As a side effect of these structural changes one can observe variations in the orientation of the chains. It is of note that the methyl and methylene groups reveal slightly different behaviour.
Słowa kluczowe
Linoleic acid, Cis-trans isomerization, Adulteration of fatty acids, UV radiation, ATR-IR spectroscopy, Two-dimensional correlation spectroscopy, Moving-window analysis
Adres publiczny
http://dx.doi.org/10.1016/j.saa.2020.118436
Strona internetowa wydawcy
Podobne publikacje
Self-assembling of oleic acid (cis-9-octadecenoic acid) and linoleic acid (cis-9, cis-12-octadecadienoic acid) in ethanol studied by time-dependent attenuated total reflectance (ATR) infrared (IR) and two-dimensional (2D) correlation spectroscopy.
Pi F., Shinzawa H., Czarnecki Mirosław A., Iwahashi M., Suzuki M., Ozaki Yukihiro
Dwuwymiarowa analiza korelacyjna = Two-dimensional correlation analysis
Czarnecki Mirosław A.
Moving-window 2D correlation spectroscopy in studies of fluphenazine-DPPC dehydrated film as a function of temperature.
Szwed Joanna, Cieślik-Boczula Katarzyna, Czarnik-Matusewicz Bogusława, Jaszczyszyn Agata, Gąsiorowski Kazimierz, Świątek Piotr, Malinka Wiesław