Abstract
By varying the stoichiometric ratio of Eu3+, Tb3+ and Gd3+ ions in a lanthanide metal-organic framework, a mixed-Ln MOF, [Eu0.0040Tb0.0460Gd0.9500(BTB)(DMSO)(2)]center dot H2O, has been designed to display white-light emission. In addition, the switch between blue, white, and yellow for this material has been achieved by controlling the energy transfer process.