Fig. 1
From: Quasi-dendritic sulfonate-based organic small molecule for high-quality NIR-II bone-targeted imaging
a Chemical structure of TTQF-SO3. b DLS and TEM image of TTQF-SO3 in water. c Physicochemical properties of TTQF-SO3. d Normalized absorption and emission spectrum of TTQF-SO3 in water. e NIR-II signals of TTQF-SO3 obtained with different filters at the same concentration (0.1 mg mL−1) in water. f The integrated fluorescence spectra of TTQF-SO3 and its versus different absorbance at 808 nm (IR-26 as reference, QY = 0.05% in dichloroethane)