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Selected Works of
Ananda Amarasekara
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Professor, Interim Head Department of Chemistry and Physics
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Ananda Amarasekara - Research Gate
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Recent Works
Recent Works
(104)
Article
Origin of the Regioselectivity in the Aldol Condensation between Hydroxymethylfurfural ...
Chemistry & Physics Faculty Publications (2017)
Liwei Zhao, Nnenna Elechi, Richard Qian, Timila B. Singh, et al.
Our previous work demonstrated that hydroxide ion (OH-) was able to catalyze aldol condensation reaction at room temperature between 5-hydroxymethylfurfural ...
Article
Acidic ionic liquid polymers: poly(bis-imidazolium-p-phenylenesulfonic acid) and applications as ...
Chemistry & Physics Faculty Publications (2017)
Ananda S. Amarasekara, Jennifer Nguyen and Ashfaqur Razzaq
A new class of polymeric acidic ionic liquids with imidazolium hydrogen sulfate and p-phenylene sulfonic acid units built into the ...
Article
A two-step efficient preparation of a renewable dicarboxylic acid monomer ...
Chemistry & Physics Faculty Publications (2017)
Ananda S. Amarasekara, Loc H Nguyen, Nnaemeka C. Okorie and Saad M Jamal
D-Fructose was converted to the dialdehyde 5,5′-[oxybis(methylene)]bis[2-furaldehyde] by heating at 110°C in DMSO with the Dowex 50 W X8 solid ...
Article
Renewable polymers: Synthesis and characterization of poly(4-ketopimelic acid-glycerol)
Chemistry & Physics Faculty Publications (2017)
Ananda S. Amarasekara, Muhammad A. Hasan and Eve Larkin
Condensation polymerization of renewable resources-based monomers, 4-ketopimelic acid and glycerol, were studied using two different catalysts; p-toluenesulfonic acid and Sb2O3. ...
Article
Sulfuric acid and Amberlyst-H+ catalyzed condensation reactions of renewable keto ...
Chemistry & Physics Faculty Publications (2017)
Ananda S. Amarasekara, Uyen Ha, Marina S. Fonari, Shabari Nath Bejagam, et al.
The sulfuric acid and Amberlyst-H+ catalyzed condensation reactions of renewable feedstock levulinic acid with paraformaldehyde under neat conditions at 80 ...
Article
A two step method for the preparation of carbamate cross-linked ...
Chemistry & Physics Faculty Publications (2016)
Ananda S. Amarasekara, Muhammad A. Hasan and Uyen Ha
Carbamate cross-linked cellulose films can be prepared in a two step method using cellulose dissolved in 1-n-butyl-3-methylimidazolium chloride ionic liquid. ...
Article
Acid Catalyzed Competitive Esterification and Ketalization of Levulinic Acid with ...
Chemistry & Physics Faculty Publications (2016)
Ananda S. Amarasekara and Moriam A. Animashaun
Abstract: Condensation reactions of levulinic acid (LA) with 1,2-ethanediol (1,2-ED), 1,2-propanediol (1,2-PD), and 1,3-propanediol (1,3-PD) were studied using Amberlyst-15 as ...
Article
Acid catalyzed condensation of levulinic acid with glyoxylic acid: Synthesis ...
Chemistry & Physics Faculty Publications (2016)
Ananda S. Amarasekara and Uyen Ha
The sulfuric acid catalyzed condensation of levulinic acid with glyoxylic acid at 80 °C, for 24 h under neat conditions ...
Article
The effect of manganese(II) chloride as a co-catalyst on ...
Chemistry & Physics Faculty Publications (2016)
Ananda S. Amarasekara and Bernard Wiredu
The effects of adding MnCl2 as a co-catalyst on cellobiose hydrolysis in 0.016 M aqueous H2SO4 and 0.032 M 1-(1-propylsulfonic)-3-methylimidazolium ...
Article
Acidic Ionic Liquids
Chemistry & Physics Faculty Publications (2016)
Ananda S. Amarasekara
Ionic liquid with acidic properties is an important branch in the wide ionic liquid field and the aim of this ...
Article
Vanillin based polymers: III. Electrochemical dimerization of vanillin revisited and ...
Chemistry & Physics Faculty Publications (2016)
Ananda S. Amarasekara and Muhammad A. Hasan
Electrochemical dimerization of vanillin in basic medium produced mixtures of meso/DL-hydrovanilloins, in contrary to earlier claims of the formation of ...
Article
Interactions of d-cellobiose with selected chloride salts: A 13C NMR ...
Chemistry & Physics Faculty Publications (2016)
Ananda S. Amarasekara and Bernard Wiredu
The interactions of cellulose model compound d-cellobiose with chloride salts of Zn2 +, Ca2 +, Li+, Sn2 +, La3 +, ...
Article
Chemocatalytic hydrolysis of cellulose at 37 °c, 1 atm
Chemistry & Physics Faculty Publications (2016)
Ananda S. Amarasekara and Bernard Wiredu
The metal salt-Brønsted acidic ionic liquid system composed of ZnCl2·1.74H2O-1-(1-propylsulfonic)-3-methylimidazolium chloride can directly hydrolyze untreated cellulose in 78% total reducing ...
Article
Synthesis and Pyrolysis of Selected Metal Levulinates
Chemistry & Physics Faculty Publications (2015)
Ananda S. Amarasekara and Dominique T. Sterling-Wells
Eight metal levulinate salts of Mg2+, Ca2+, Sr2+, Ba2+, La3+, Fe3+, Cu2+, and Zn2+ were prepared by reacting the corresponding ...
Article
1-(1-Propylsulfonic)-3-methylimidazolium chloride acidic ionic liquid catalyzed hydrolysis of ...
Chemistry & Physics Faculty Publications (2015)
Bernard Wiredu and Ananda S. Amarasekara
Abstract The effect of eight metal ions, Cr3 +, Mn2 +, Fe3 +, Co2 + Ni2 +, Cu2 +, Zn2 ...
Article
The effect of metal ions as co-catalysts on acidic ionic ...
Chemistry & Physics Faculty Publications (2015)
Bernard Wiredu and Ananda S. Amarasekara
The effects of adding Cr3+, Mn2+, Fe3+, Co2+ Ni2+, Cu2+, Zn2+ and La3+ chlorides as co-catalysts to 1-(1-propylsulfonic)-3-methylimidazolium chloride acidic ...
Article
Crystal structure of a polymeric calcium levulinate dihydrate: Catena-poly[[diaquacalcium ...
Chemistry & Physics Faculty Publications (2015)
Ananda S. Amarasekara, Dominique T. Sterling-Wells, Carlos Ordonez, Marie Josiane Ohoueu, et al.
In the title calcium levulinate complex, [Ca(C5H7O3)2(H2O)2]n, the Ca2+ ion lies on a twofold rotation axis and is octacoordinated by ...
Article
NaOH catalyzed condensation reactions between levulinic acid and biomass derived ...
Chemistry & Physics Faculty Publications (2015)
Ananda S. Amarasekara, Timila B. Singh, Eve Larkin, Muhammad A. Hasan, et al.
NaOH catalyzed condensation reaction between 5-hydroxymethylfurfural and levulinic acid in water gives a 2.5: 1 mixture of aldol products: (E)-6-[5-(hydroxymethyl)furan-2-yl]-hex-4-oxo-5-enoic ...
Article
Pd/C catalyzed conversion of levulinic acid to γ-valerolactone using ...
Chemistry & Physics Faculty Publications (2015)
Ananda S. Amarasekara and Muhammad A. Hasan
Levulinic acid can be converted to γ-valerolactone in 83-86% yield under microwave heating with 10 mg of 5% Pd/C per ...
Article
Acidic ionic liquid catalyzed liquefaction of cellulose in ethylene glycol ...
Chemistry & Physics Faculty Publications (2015)
Ananda S. Amarasekara and Bernard Wiredu
Cellulose can be liquefied in ethylene glycol at 180 °C, using 6.7 mol % 1-(1-alkylsulfonic)-3-methylimidazolium chloride ionic liquids as catalysts. ...
Article
γ-Valerolactone from pyrolysis of calcium salts of levulinic-formic acid mixtures ...
Chemistry & Physics Faculty Publications (2015)
Ananda S. Amarasekara, Bernard Wiredu and Dre'Langala N. Edwards
Hydrothermal degradation of cellulose (DP~450) in 0.02-0.20moldm-3 aq. hydrochloric acid at 160°C, for 2-8h and neutralization of the filtrate with ...
Article
Acidic Ionic Liquid Catalyzed One-Pot Conversion of Cellulose to Ethyl ...
Chemistry & Physics Faculty Publications (2014)
Ananda S. Amarasekara and Bernard Wiredu
Cellulose can be converted to a mixture of ethyl levulinate and levulinic acid by heating with a Brönsted acidic ionic ...
Article
1-(1-Alkylsulfonic)-3-methylimidazolium chloride Brönsted acidic ionic liquid catalyzed Skraup ...
Chemistry & Physics Faculty Publications (2014)
Ananda S. Amarasekara and Muhammad A. Hasan
1-(1-Alkylsulfonic)-3-methylimidazolium chloride Brönsted acidic ionic liquids are shown as excellent catalysts and reaction mediums for Skraup synthesis of quinolines under ...
Article
Mechanism of 1-(1-propylsulfonic)-3-methylimidazolium chloride catalyzed transformation of d-glucose ...
Chemistry & Physics Faculty Publications (2014)
Ananda S. Amarasekara and Ashfaqur Razzaq
The conversion of d-glucose to 5-hydroxymethylfurfural (HMF) in the presence of 5.48 mol % 1-(1-propylsulfonic)-3-methylimidazolium chloride acidic ionic liquid catalyst ...
Article
Synthesis of a silica-immobilized Brönsted acidic ionic liquid catalyst and ...
Chemistry & Physics Faculty Publications (2014)
Bernard Wiredu and Ananda S. Amarasekara
A silica immobilized imidazolium-type acidic ionic liquid catalyst was shown to be a better catalyst than n-propylsulfonic acid silica (PrSO ...
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