Novel blue-emitting cyanuric acid-melamine complexes CA(x)(.)M(1-x), (x = 0.8-0.9) have been prepared by a simple two-step procedure from urea. Relatively strong and pure blue-light emission with a maximum at 470 nm was observed from these complexes. These complexes are very promising light-emitting materials due to their good thermal stability. (c) 2005 Elsevier Ltd. All rights reserved.