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Ananda Amarasekara
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Professor, Interim Head Department of Chemistry and Physics
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Recent Works
Recent Works
(104)
Article
Sol-gel synthesis, characterization and water vapor adsorption properties of 1 ...
Chemistry & Physics Faculty Publications (2014)
Ananda S. Amarasekara, Ashfaqur Razzaq, Robert Caballero and Bernard Wiredu
1,1′-(1,6-hexanediyl)-bis(imidazolium)dichloride-silica hybrid material was prepared in 90 % yield by ammonia catalyzed sol-gel condensation of 1,1′-(1,6-hexanediyl)-bis[3-(3-triethoxysilylpropyl)-imidazolium] dichloride in aqueous ethanol. ...
Article
Single reactor conversion of corn stover biomass to C5-C20 furanic ...
Chemistry & Physics Faculty Publications (2014)
Ananda S. Amarasekara and Bernard Wiredu
Cellulose (DP~450) and dry corn stover powder were converted to furanic biocrude oils in a single reactor operation by heating ...
Book
Handbook of Cellulosic Ethanol
Chemistry & Physics Faculty Publications (2013)
Ananda S. Amarasekara
Comprehensive coverage on the growing science and technology of producing ethanol from the world's abundant cellulosic biomass. The inevitable decline ...
Article
Degradation of Untreated Switchgrass Biomass into Reducing Sugars in 1- ...
Chemistry & Physics Faculty Publications (2013)
Ananda S. Amarasekara and Preethi Shanbhag
Switchgrass biomass samples collected at three different stages of maturity were seen degrading into reducing sugars and glucose when exposed ...
Article
A comparison of dilute aqueous p-toluenesulfonic and sulfuric acid pretreatments ...
Chemistry & Physics Faculty Publications (2012)
Ananda S. Amarasekara and Bernard Wiredu
Single step pretreatment-saccharification of corn stover was investigated in aqueous p-toluenesulfonic and sulfuric acid media. Dilute aqueous solution of p-toluenesulfonic ...
Article
Synthesis and characterization of branched polymeric ionic liquids with imidazolium ...
Chemistry & Physics Faculty Publications (2012)
Ananda S. Amarasekara, Brandon Callis and Bernard Wiredu
A branched polymeric ionic liquid (PIL) with imidazolium cation segments in the main chain connecting branching points was prepared in ...
Article
Aryl sulfonic acid catalyzed hydrolysis of cellulose in water
Chemistry & Physics Faculty Publications (2012)
Ananda S. Amarasekara and Bernard Wiredu
Catalytic activities of eight alkyl/aryl sulfonic acids in water were compared with sulfuric acid of the same acid strength (0.0321 ...
Article
Vanillin based polymers: I. An electrochemical route to polyvanillin
Chemistry & Physics Faculty Publications (2012)
Ananda S. Amarasekara, Bernard Wiredu and Ashfaqur Razzaq
Electrochemical reductive polymerization of divanillin in aqueous sodium hydroxide using a lead cathode gives polyvanillin in 91% yield. The product ...
Article
Interactions of D-cellobiose with p-toluenesulfonic acid in aqueous solution: A ...
Chemistry & Physics Faculty Publications (2011)
Ananda S. Amarasekara, Onome S. Owereh and Brian Ezeh
The effects of adding D 2SO 4, and p-toluenesulfonic acid-d to D-cellobiose dissolved in D 2O were investigated at 23 ...
Article
Synthesis of levulinic acid-glycerol ketal-ester oligomers and structural characterization using ...
Chemistry & Physics Faculty Publications (2011)
Ananda S. Amarasekara and Steven A. Hawkins
Oligomerizations of renewable resources based monomers levulinic acid, and glycerol were studied using three different catalysts, Sb2O 3, p-toluenesulfonic acid, ...
Article
5-Hydroxymethylfurfural Based Polymers
Chemistry & Physics Faculty Publications (2011)
Ananda S. Amarasekara
5-Hydroxymethylfurfural (HMF) is a renewable resource based potentialplatform chemical useful in the synthesis of polymers. This versatilesix carbon furan system ...
Article
Degradation of cellulose in dilute aqueous solutions of acidic ionic ...
Chemistry & Physics Faculty Publications (2011)
Ananda S. Amarasekara and Bernard Wiredu
Dilute aqueous solutions of 1-(1-propylsulfonic)-3-methylimidazolium chloride and p-toluenesulfonic acid are shown to be better catalysts than aqueous sulfuric acid of ...
Article
Synthesis and characterization of polymeric ionic liquid poly(imidazolium chloride-1 ...
Chemistry & Physics Faculty Publications (2011)
Ananda S. Amarasekara and Preethi Shanbhag
Polymeric ionic liquid poly(imidazolium chloride-1,3-diylbutane-1,4-diyl) with imidazolium cation groups built into the main chain was prepared using two different routes ...
Article
Thermal properties of sulfonic acid group functionalized Brönsted acidic ionic ...
Chemistry & Physics Faculty Publications (2011)
Ananda S. Amarasekara and Onome S. Owereh
Thermal decomposition onset temperatures have been measured for a total of 24 methylimidazolium, triethanolammonium, and pyridinium type sulfonic acid groups ...
Article
X-ray crystallography and computational studies of the structure of bis-nitrone ...
Chemistry & Physics Faculty Publications (2010)
Ananda S. Amarasekara, Diamond Lewis, Shravana L. Nayani, Tatiana V. Timofeeva, et al.
Bis-nitrone, 2,5-bis{[methyl(oxido)imino]phenyl}-furan prepared by condensation of 2,5-diformylfuran with two equivalents of phenylhydroxylamine can theoretically exist in 10 different structural isomeric ...
Article
Synthesis of a sulfonic acid functionalized acidic ionic liquid modified ...
Chemistry & Physics Faculty Publications (2010)
Ananda S. Amarasekara and Onome S. Owereh
A sulfonic acid functionalized acidic ionic liquid modified silica catalyst was prepared in 68% overall yield from 3-chloropropyl silica by ...
Article
Hydrolysis and decomposition of cellulose in bron̈sted acidic ionic ...
Chemistry & Physics Faculty Publications (2009)
Ananda S. Amarasekara and Onome S. Owereh
Cellulose dissolves in Bron̈sted acidic ionic liquids 1-(1-propylsulfonic)-3-methylimidazolium chloride and 1-(1-butylsulfonic)-3- methylimidazolium chloride up to 20 g/100 g ionic liquid ...
Article
Synthesis of functionalized polysiloxane 4-acylpyrazolone Schiff base ligand system and ...
Chemistry & Physics Faculty Publications (2009)
Ananda S. Amarasekara, Onome S. Owereh and Sukesh K. Aghara
A novel functionalized polysiloxane material with covalently bonded 4-acylpyrazolone Schiff base ligand was prepared by polycondensation of 4-[1-(3-triethoxysilyl-propylamino)-ethylidene]-5-methyl-2-phenyl-2, 4-dihydro-pyrazol-3-one with ...
Article
Zinc chloride mediated degradation of cellulose at 200 °C and ...
Chemistry & Physics Faculty Publications (2009)
Ananda S. Amarasekara and Chidinma C. Ebede
The effect of ZnCl2 on the degradation of cellulose was studied to develop conditions to produce useful feedstock chemicals directly ...
Article
Homogeneous phase synthesis of cellulose carbamate silica hybrid materials using ...
Chemistry & Physics Faculty Publications (2009)
Ananda S. Amarasekara and Onome S. Owereh
Cellulose carbamate silica hybrid materials can be prepared in 78-84% yield using the homogeneous phase reaction of 3-(triethoxysilyl)propyl isocyanate with ...
Article
Renewable resources based polymers: Synthesis and characterization of 2,5-diformylfuran-urea ...
Chemistry & Physics Faculty Publications (2009)
Ananda S. Amarasekara, Dalkeith Green and La Toya D. Williams
Condensation of renewable resources based monomer 2,5-diformylfuran (DFF) and urea at 110 °C by melting a solid mixture gives a ...
Article
Synthesis of 4-acylpyrazolone Schiff base ligand grafted silica and selectivity ...
Chemistry & Physics Faculty Publications (2009)
Ananda S. Amarasekara, Onome S. Owereh and Sukesh K. Aghara
The Schiff base form of the 4-acylpyrazolone ligand was immobilized on the silica surface by reaction of 3-aminopropyl silica with ...
Article
Mechanism of the dehydration of d-fructose to 5-hydroxymethylfurfural in dimethyl ...
Chemistry & Physics Faculty Publications (2008)
Ananda S. Amarasekara, La Toya D. Williams and Chidinma C. Ebede
The anomeric composition of d-fructose in dimethyl sulfoxide changes when the solution is heated from room temperature to 150 °C, ...
Article
A simple one-pot synthesis of Jacobson-Katsuki type chiral Mn(III ...
Chemistry & Physics Faculty Publications (2008)
Ananda S. Amarasekara, Ivana McNeal, Jeffry Murillo, Dalkeith Green, et al.
Salen ligand synthesized from (1R,2R)-(-)-1,2-diaminocyclohexane and 2-hydroxy-3(3-triethoxysilyl-propyl)-benzaldehyde has been used as manganese chelate for the immobilization of the catalytic site. ...
Article
Efficient oxidation of 5-hydroxymethylfurfural to 2,5-diformylfuran using Mn(III ...
Chemistry & Physics Faculty Publications (2008)
Ananda S. Amarasekara, Dalkeith Green and Erinn McMillan
5-Hydroxymethylfurfural is efficiently oxidized to 2,5-diformylfuran in 63-89% yield using Mn(III)-salen catalysts and sodium hypochlorite, in a pH 11.3 phosphate ...
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