Condensation product of 5-bromosalicylaldehyde and aminophenol: Fluorescence sensor for ascorbic acid and AND Logic Gate

Abstract

Condensation product (L) of 5-bromosalicylaldehyde and aminophenol has been synthesised and characterised. Fluorescence of L enhances by 23 times on interaction with Ce³⁺ while it is quenched completely by Ce⁴⁺. Ascorbic acid (AA) is a well known strong reducing agent and this property has been used to act L:Ce⁴⁺ adduct as a fluorescence “on” sensor for AA. AA reduces Ce⁴⁺ into Ce³⁺ and thereby increasing fluorescence of L due to the formation of L:Ce³⁺ adduct. Molecules which generally coexist with AA viz. Cholesterol, Glucose, Sucrose and Dopamine found not to interfere. The interaction of L with Ce³⁺, Ce⁴⁺ and subsequently with AA has been verified with cyclic voltammetry.