Fig. 1
From: Highly stable organic photothermal agent based on near-infrared-II fluorophores for tumor treatment
The photophysical properties of the as-prepared NIR-II fluorophores. a, b are absorption and emission spectra of NIR-II dyes (10 μM) in DMSO, respectively. The emission spectra were obtained under irradiation at 808 nm with same absorption. c The antiphotobleaching of NIR-II dyes compared with commercial dyes (ICG and S1451) under irradiation (808 nm, 0.2 W cm−2, 10 min). I/I0 is the ratio of the maximal absorption of dyes after and before irradiation for 10 min, respectively. d Temperature changes of NIR-II dyes (10−5 M) in DMSO under irradiation (808 nm, 0.5 W cm−2, 6 min). The starting temperature is 22 °C