Sodium Alginate Biopolymer: An Efficient, Recyclable Green Catalyst for the Synthesis of Chalcone Derivatives under Mild Conditions

Abstract

One-pot chemical synthesis of highly pure chalcone under mild conditions using biocompatible Na-alginate biopolymer is reported. Several chalcone derivatives are prepared by magnetic stirring the equimolar quantities of the appropriate methyl ketone and aryl aldehyde with sodium alginate in ethanol under neutral conditions at room temperature. It is observed that in the presence of recyclable sodium alginate biocatalyst, highly pure chalcone with excellent yields in a very short time are obtained. The chalcone derivatives obtained are well characterized by UVDRS and FTIR techniques. The easily separable Na-alginate biocatalyst acts as a Bronsted acid and may be reused up to five cycles.

PANI/Ferrous Oxide Based Hybrid Material for Ammonia Sensing Applications

“…In order to overcome this problem, the blending of organic and inorganic nanocomposites materials has been utilized smartly for various gas sensing applications. [19][20][21][22] It is also found that most of the transition metal oxides are n-type semiconductors and may be used for gas sensing purpose. In the present study nanocomposite of PANI with ferrous oxide (𝛼-Fe 2 O 3 ) is prepared in situ and is used for ammonia gas sensing purpose at room temperature.…”