Two researchers from the Department of Chemistry at IIT Madras successfully produced white light using a mixture of two natural extracts – red pomegranate and turmeric. The experiment was conducted by former research scholar Vikram Singh along with his colleague Ashok Mishra. Both the researchers used a simple and environment-friendly procedure to extract dyes from pomegranate and turmeric.
While polyphenols and anthocyanins present in red pomegranate emit at blue and orange-red regions of the wavelength respectively, curcumin from turmeric emits at the green region of the wavelength. White light emission is produced when red, blue and green mix together. This is the first time that white light emission has been generated using low-cost, natural and edible dyes.
The results were published in the journal Scientific Reports. Vikram Singh won the BIRAC Gandhian Young Technological Innovation (GYTI) Award 2017 for his work. Speaking on the achievement, Singh who is also the first author of the paper stated that they had to mix the two extracts in a particular ratio to produce white light. Currently, Singh is at researching at Lucknow’s CSIR-Central Drug Research Institute (CDRI).