Blue light (IMAGE) University of Münster Caption The chemists use blue light to produce unsymmetrically structured vizinal diamines. Credit University of Münster - Glorius group Usage Restrictions The use of the photo is only permitted in connection with this press release and with reference to the source. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.