Table 2.

The summary of fluorescence and UV spectra of compounds 1–6.

compound	λ(max) of excitation (nm)	λ(max) of emission (nm)	Maximum intensity of emission	λ(max) of absorption in UV (nm)
1	295.0	355.5	142.2	291–296
2	300.0	352.0	169.7	282–310
3	300.0	353.5	100.6	286–330
4	295.0	358.5	939.5	282–300
5	310.0	360.0	275.3	282–297
6	285.0	360.0	948.3	287–313