Fig. 3: Comparison of PL spectra of guest, host and DS-a.

Comparison of PL spectra of DS-a 1:1000 under a 374 nm and b 295 nm excitation with those of host and guest in different environment. c Normalized delayed PL spectra of DS-a 1:100, DS-a 1:1000 and DS-a 1:10000 after 374 nm excitation.