Fourier-transform Infrared Spectroscopy Studies on Carboxylic Acids and Cellobiose
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1
Prairie View A&M University, United States
Green chemistry is ever evolving and development of efficient methods for the preparation of sustainable materials from renewable resources is a current, high priority research interest. Cellulose is one of the most abundant bio-polymers on earth and depolymerization of cellulose to glucose is a major pathway to produce sustainable feedstock chemicals.
Due to the structural complexity of cellulose, this study uses cellobiose as a model compound for cellulose. Cellobiose (C12H22O11) is a section of the cellulose structure and can be classified as a disaccharide. It can be harvested from cellulose via enzymatic or acidic hydrolysis. In this study interactions of dicarboxylic acids with cellobiose were studied using infrared (IR) spectroscopy. The dicarboxylic acids used in this study are; cyclohexane-1,4-dicarboxylic, oxalic, malonic, succinic, phthalic, lactic, and tartaric acids.
Experimentation involves the preparation of homogenous mixtures of cellobiose and dicarboxylic acids using the measurement of IR spectra in the solid state. The IR spectra of these mixtures were examined for shifts and changes in IR absorptions, which is indicative of changes in bond strengths in the carboxylic acids and cellobiose due to intermolecular interactions.
We have found that oxalic and maleic acids give high IR absorption shifts in comparison to other acids studied. This is probably due to these two dicarboxylic acids strongly interacting with OH groups of cellobiose through hydrogen bonding type dipolar interactions.
These results will be used in the development of polycarboxylic acid based cellulose hydrolysis catalyst systems for the efficient production of glucose.
Acknowledgements
Prairie View A&M University Department of Chemistry
Prairie View A&M University Center for Energy & Environmental Sustainability
National Science Foundation
Keywords:
Fourier-transform absorption infrared spectroscopy,
infrared specstroscopy,
platform chemicals,
Carboxylic acid,
Cellobiose
Conference:
National Organization for the Professional Advancement of Black Chemists and Chemical Engineers (NOBCChE) 45th Annual Conference , Orlando, Florida, United States, 17 Sep - 20 Sep, 2018.
Presentation Type:
Poster Presentation
Topic:
Enviornmental and Green Chemistry
Citation:
Amarasekara
AS and
Maroney Lawrence
YV
(2019). Fourier-transform Infrared Spectroscopy Studies on Carboxylic Acids and Cellobiose.
Front. Chem.
Conference Abstract:
National Organization for the Professional Advancement of Black Chemists and Chemical Engineers (NOBCChE) 45th Annual Conference .
doi: 10.3389/conf.fchem.2018.01.00056
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Received:
19 Oct 2018;
Published Online:
17 Jan 2019.
*
Correspondence:
PhD. Ananda S Amarasekara, Prairie View A&M University, Prairie View, Texas, 77446, United States, asamarasekara@pvamu.edu