N-Alkyl-pyrene-1-carboxamide derivatives exhibited bright blue emission in all solvents (for example, glycerin: Φfl = 0.91). While N,N-dialkyl-pyrene-1-carboxamide did not emit in most media studied (EtOH: Φfl <0.01), it showed relatively strong emission in viscous media (glycerin: Φfl = 0.082).