Fig. 3. (a) Fluorescence emission spectrum of initial anthracene : PEG 2 : 5 molar ratio (1×, 1 : 9300) or 10-fold increase in An 2 (10×, 1 : 930) co-polymerization at indicated times following 337 nm excitation. (b) Photographs of sample illuminated by hand-held UV light (365 nm).