This data belongs to fluorescence measurements which were recorded using a RF-5301 PC spectrofluorometer (Shimadzu)
in a quartz cuvette (path length 1 cm) using 10-5 M of monomers (1F, 2F, 4F) in dichloromethane.
The excitation wavelengths for 1F, 2F and 4F were 343 nm, 346 nm and 309 nm respectively
using an emission slit width of 1.5 nm and an excitation slit width of 3 nm at high sensitivity.