摘要：There a few reports of rhodamine-based fluorescent sensors for selective detection of only Al3 , due to the challenge of identifying a suitable ligand for binding Al3 ion. The use of fluorophore moieties appended to a polymer backbone for sensing applications is far from mature. Here, we report a new fluorescent probe/monomer 4 and its ROMP derived polymer P for specific detection of Al3 ions. Both monomer 4 and its polymer P exhibit high selectivity toward only Al3 with no interference from other metal ions, having a limit detection of 0.5 and 2.1 µM, respectively. The reversible recognition of monomer 4 and P for Al3 was also proved in presence of Na2EDTA by both UV–Vis and fluorometric titration. The experimental data indicates the behavior of 4 and P toward Al3 is pH independent in medium conditions. In addition, the switch-on luminescence response of 4 at acidic pH (0 < 5.0), allowed us to specifically stain lysosomes (pH ~ 4.5–5.0) in live cells.
其他摘要：Abstract There a few reports of rhodamine-based fluorescent sensors for selective detection of only Al 3 , due to the challenge of identifying a suitable ligand for binding Al 3 ion. The use of fluorophore moieties appended to a polymer backbone for sensing applications is far from mature. Here, we report a new fluorescent probe/monomer 4 and its ROMP derived polymer P for specific detection of Al 3 ions. Both monomer 4 and its polymer P exhibit high selectivity toward only Al 3 with no interference from other metal ions, having a limit detection of 0.5 and 2.1 µM, respectively. The reversible recognition of monomer 4 and P for Al 3 was also proved in presence of Na 2 EDTA by both UV–Vis and fluorometric titration. The experimental data indicates the behavior of 4 and P toward Al 3 is pH independent in medium conditions. In addition, the switch-on luminescence response of 4 at acidic pH (0 < 5.0), allowed us to specifically stain lysosomes (pH ~ 4.5–5.0) in live cells.
