Figure 10.

(A) Sensing mechanism of Cy-PDA for Pd²⁺. (B) The absorption spectrum of the Cy-PDA after adding different concentrations of Pd²⁺. (C) PA signal ratio (PA₇₇₀/PA₇₁₀) as a function of Pd²⁺ concentration. (D) PA images at 710 nm and 770 nm after injection of Cy-DPA through the groin in mice. (E) PA images at 710 nm and 770 nm after co-injection of Cy-DPA and Pd²⁺ through the groin in mice. (F) The sensing mechanism of NRh-IR-NMS for Cu²⁺. (G) Change of absorption spectra of NRh-IR-NM solution with time after adding Cu²⁺ solution. (H) Changes in Abs₇₁₆/Abs₈₃₄ of probes after incubation with different metal ions. (I) PA images of NRh-IR-NMS after reaction with metal ions. (J) The relationship between Cu²⁺ concentration and PA signal ratio. (K) PA images of mice after different treatments and (L) corresponding ΔPA₇₁₆/ΔPA₈₃₄. (A-E) Adapted with permission from ¹³⁹, Copyright 2020 American Chemical Society. (F-L) Adapted with permission from ¹⁴³, Copyright 2018 American Chemical Society.