Fig. 7
NIR-II
fluorophores FD-1080: (a) Synthetic route of FD-1080. (b) The absorbance and
fluorescent emission spectra of FD-1080 dye with an absorbance
peak at about 1,046 nm and an emission peak at about 1,080 nm. The
fluorescent emission spectrum was obtained under 1,064 nm laser excitation. Inset: An
NIR-II
fluorescence image of FD-1080 (50 mm) in deionized water, FBS, and PBS (1,100 nm long-pass
filter) under excitation of 1,064 nm. (c) Reported NIR-II
agents with varied excitation wavelengths. (d) Photostability of FD-1080 and ICG complexes in a variety of biological media under continuous 1,064 nm and
808 nm exposure for about 80 min at a power density of 0.33 Wcm
À2
, respectively. (a–d) Reprinted (adapted) with permission from Ref. [36] Copyright 2018,
Wiley-VCH Verlag GmbH & Co. KGaA
92
S. He and Z. Cheng
NIR-II
fluorophores FD-1080: (a) Synthetic route of FD-1080. (b) The absorbance and
fluorescent emission spectra of FD-1080 dye with an absorbance
peak at about 1,046 nm and an emission peak at about 1,080 nm. The
fluorescent emission spectrum was obtained under 1,064 nm laser excitation. Inset: An
NIR-II
fluorescence image of FD-1080 (50 mm) in deionized water, FBS, and PBS (1,100 nm long-pass
filter) under excitation of 1,064 nm. (c) Reported NIR-II
agents with varied excitation wavelengths. (d) Photostability of FD-1080 and ICG complexes in a variety of biological media under continuous 1,064 nm and
808 nm exposure for about 80 min at a power density of 0.33 Wcm
À2
, respectively. (a–d) Reprinted (adapted) with permission from Ref. [36] Copyright 2018,
Wiley-VCH Verlag GmbH & Co. KGaA
92
S. He and Z. Cheng