“Turn-Off” Fluorescent Sensor for Pamidronate Disodium and Zoledronic Acid Based on Newly Synthesized Carbon Dots from Black Tea

Figure 6

The influence of naturally abundant foreign metal ions and biomolecules (1.0 × 10⁻⁵ mol·L⁻¹) for the turn-off sensor ((a) pamidronate disodium: 4 × 10⁻⁷ mol·L⁻¹ and (b) zoledronic acid: 8 × 10⁻⁷ mol·L⁻¹) and the comparison of different quenching abilities towards CDs of different bisphosphonates at the concentration of 4 × 10⁻⁷ mol·L⁻¹ (c).

(a)

(b)

(c)