ISSN: 2249-0353 Original Article Isolation, application and biochemical characterization of colour component from Tecoma stans: A new cost effective and eco-friendly source of natural dye

Natural dyes have gained importance due to the growing environmental awareness and implementation of stringent regulations in production and use of synthetic dyes. This scenario necessitated the present investigation on bio-dyes. The study revealed three important features viz. flowers of Tecoma stans possesses fast colour yellow colorant -a carotenoid group of pigments – Zeaxanthin., secondly during dyeing process, pre-mordanting with stannous chloride has yielded better color fastness., fluorescence decay profile of zeaxanthin in Dichloro methane (DCM) exhibited Excitation (λ) at 420 nm and emission (λ) at 650 nm which strongly support the self quenching property of zeaxanthin. By virtue of such interesting property, flowers of Tecoma stans is could be a potential source of yellow colourant with striking spectroscopic characteristics.