Fig. 2: Photophysical property of the guests.
From: White light-excited organic room-temperature phosphorescence for improved in vivo bioimaging

a Molecular structures of the guests and host. b Phosphorescence emission spectra of six guests at 77 K (excitation wavelength: 380 nm; delayed time: 1 ms). c Excitation spectra of phosphorescence emission. d Phosphorescence intensity attenuation curves of six guests at 77 K (Excitation wavelength: 420 nm). e Phosphorescence images of TRZ-1 and TRZ-5 after white-light excitation at 77 K.