A multi-photon fluorescence “on-off-on” probe based on organotin (IV) complex for high-sensitive detection of Cu2+

Fine Tuning of Multiphoton AIE Emission Behavior, Organelle Targeting, and Fluorescence Lifetime Imaging of Terpyridine Derivatives by Alkyl Chain Engineering

“…Although the increase in the degree of the 3PA cross section of ZA-Mex is minimal compared to ZA-Hex , the value in the aggregate state (4.98 × 10 –82 cm 6 s 2 per photon 2 ) has a 7.51-fold increase compared to the solution state (0.66 × 10 –82 cm 6 s 2 per photon 2 ) (Figure S19). − ZA does not possess three-photon AIE emission behavior, and hence its absorption cross section has the value of 0 (Figure b).…”

Recent advancements of fluorescent tin(iv) complexes in biomedical molecular imaging

“…19) using multiphoton fluorescence imaging. 67 72 exhibits a two-photon λ em in the wavelength range of 800–880 nm whereas the maximum 2PA action cross section is in the range of 326–1163 GM. Similarly, the three-photon absorption cross-section was 26.90 × 10 −82 cm 6 s 2 mol −2 at 1450 nm but upon gentle addition of Cu 2+ salt the absorption is reduced to 6.76 × 10 −82 cm 6 s 2 mol −2 .…”

“…59 Recently, fluorescent tin complexes have been reported for showing two or multiple photon-induced emission characteristics for advanced application in cellular imaging. 28,39,[60][61][62][63][64][65][66][67] The maximum twophoton cross-section reported for tin complexes is in the range of 50-2500 GM (1 GM is 10 À50 cm 4 s photon À1 ; Goe ¨ppert-Mayer units), 60 which is much higher than the commercially used dyes such as DAPI, rhodamine B, and fluorescein. This property of tin(IV) complexes is promising for taking a bright two-photon image without triggering any considerable photodamage to the sample.…”

Fluorescent Diorganotin(IV) Complexes as Anticancer Agents: Study of Cytotoxicity, Cellular Localization, and Mechanism of Cell Death

“…21,22,35−37 Some luminescent organotin(IV) complexes are summarized in Figure 1, which have been used for the study of in vivo imaging and toxicity earlier. 38,39,40,41 On the other hand, the cytotoxicity activity of a metal-based drug can be modulated by the choice of a suitable ligand. For a long time, aroylhydrazone has been paid substantial consideration due to its attractive chemical behavior and biological essentialness.…”

“…Some luminescent organotin­(IV) complexes are summarized in Figure , which have been used for the study of in vivo imaging and toxicity earlier. ,,, …”