FTIR and NMR spectra of polymeric ionic liquids – Products of reaction between hydroxycontaining amidines and carbon dioxide
Irgibaeva I. Barashkov N. Aldongarov A. Zhapakova A. Eralinov A. Sakhno T. Seralin A. Sakhno Y.
November 2023Elsevier Ltd
Journal of CO2 Utilization
2023#77
Two hydroxy-containing amidine derivatives have been synthesized by condensation of amino-alcohols such as monoethanolamine (MEA) and tris(hydroxymethyl)aminomethane (TRIS) with N,N-dimethylformamide dimethyl acetal. Their interaction with carbon dioxide, leading to the formation of polymeric ionic liquids, was studied by FTIR and NMR spectroscopy. Dilute solutions of polymeric ionic liquids are also investigated by measuring the relative viscosity during the reaction. It has been found that during interaction of MEA-based amidine with CO2 within first 60 min of reaction the intensities ratio of absorbance bands at 1644 and 1705 cm−1 dropped from 2.84 to 1.33. The linear relationship between the time of reaction and the mentioned ratio of intensities has been established. In the similar manner the changes in the intensities ratio of absorbance bands at 1696 and 1629 cm−1 can be used for monitoring the reaction between TRIS-based amidine and CO2. Solution of polymeric ionic liquid prepared by reaction of TRIS-based amidine with CO2 in i-propanol has been used for measuring molecular weight (Mw = 637, Mn= 349; Mw/Mn = 1.828) by gel-permeation chromatography.
Amidine , Carbon dioxide , FTIR spectra , Gel-permeation chromatography , Ionic liquids , Kinetics of reaction , NMR spectra , Polarity
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L.N. Gumilyov Eurasian National University, Kazakhstan, 2 Satpayev str, Nur-Sultan, 010008, Kazakhstan
Micro-Tracers, Inc., United States of America, 1370 Van Dyke Avenue, San Francisco, 94124, CA, United States
Department Biotechnology and Chemistry, Poltava State Agrarian University, 1/3 Skovorody str, Poltava, 36000, Ukraine
Luminescent Materials Research Center, Ltd., 5/2 AbylayKhan av, Nur-Sultan, 010008, Kazakhstan
National Laboratory Astana, Nazarbayev University, 53 Kabanbay Batyr Ave, Nur-Sultan city, 010000, Kazakhstan
Interdisciplinary Science and Engineering Laboratory, Department of Plant and Soil Sciences, University of Delaware, Newark, 19716, DE, United States
L.N. Gumilyov Eurasian National University
Micro-Tracers
Department Biotechnology and Chemistry
Luminescent Materials Research Center
National Laboratory Astana
Interdisciplinary Science and Engineering Laboratory
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