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Browsing Research Articles (Sridhar Rajaram) by Issue Date

Now showing items 1-6 of 6

Conformational change in a urea catalyst induced by sodium cation and its effect on enantioselectivity of a Friedel-Crafts reaction

Chittoory, Arjun K.; Kumari, Gayatri; Mohapatra, Sudip; Kundu, Partha P.; Maji, Tapas K.; Narayana, Chandrabhas; Rajaram, Sridhar (Pergamon-Elsevier Science Ltd, 2014)

While developing bis-camphorsulfonyl urea as a hydrogen-bonding catalysts, we discovered that the native conformation of the catalyst is unsuitable for inducing enantioselectivity. By complexing the catalyst with weakly ...
Unusual Reactivity of Nitronates with an Aryl Alkyl Carbonate: Synthesis of alpha-Amino Esters

Reddy, Golipalli Ramana; Mukherjee, Debopreeti; Chittoory, Arjun Kumar; Rajaram, Sridhar (American Chemical Society, 2014)

The monoanions of nitroalkanes are ambident nucleophiles that react with carbonate electrophiles through the oxygen atom. Products arising from reactivity at the carbon atom will yield alpha-nitro esters, which are precursors ...
Raman, IR and DFT studies of mechanism of sodium binding to urea catalyst

Kundu, Partha P.; Kumari, Gayatri; Chittoory, Arjun K.; Rajaram, Sridhar; Narayana, Chandrabhas (Elsevier Science Bv, 2015)

Bis-camphorsulfonyl urea, a newly developed hydrogen bonding catalyst, was evaluated in an enantioselective Friedel Crafts reaction. We observed that complexation of the sulfonyl urea with a sodium cation enhanced the ...
A Comparison of Charge Separation Dynamics in Organic Blend Films Employing Fullerene and Perylene Diimide Electron Acceptors

Shoaee, Safa; Deledalle, Florent; Tuladhar, Pabitra Shakya; Shivanna, Ravichandran; Rajaram, Sridhar; Narayan, K. S.; Durrant, James R. (American Chemical Society, 2015)

We report a comparison of charge carrier dynamics and device performance for low band gap polymer PBDTTT-CT in blends with the fullerene acceptor PC71BM and a PDI derivative with similar electron affinities. Charge separation ...
Ferroelectric Polymer Matrix for Probing Molecular Organization in Perylene Diimides

Chellappan, Kishore V.; Kandappa, Sunil Kumar; Rajaram, Sridhar; Narayan, K. S. (American Chemical Society, 2015)

Ferroelectric films of poly(vinylidene fluoride-co-trifluoroethylene) (PVDF-TrFE) provide a controlled environment to study the aggregation tendency of functional molecules such as perylene diimides (PDIs). The local ...
Activation of Benzyl Aryl Carbonates: The Role of Cation-pi Interactions

Reddy, Golipalli Ramana; Avadhani, Anusha S.; Rajaram, Sridhar (American Chemical Society, 2016)

Benzyl aryl carbonates can react with a nucleophile to yield an activated electrophile and an aryloxide anion. Previously, we had utilized this in the synthesis of alpha-nitro esters from nitroalkanes. To further understand ...

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