Multifunctional rhodamine B appended ROMP derived fluorescent probe detects Al3+ and selectively labels lysosomes in live cells. Academic Article uri icon


  • 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 2.1M, 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.

published proceedings

  • Sci Rep

altmetric score

  • 2.7

author list (cited authors)

  • Gandra, U. R., Courjaret, R., Machaca, K., Al-Hashimi, M., & Bazzi, H. S.

citation count

  • 3

complete list of authors

  • Gandra, Upendar Reddy||Courjaret, Raphael||Machaca, Khaled||Al-Hashimi, Mohammed||Bazzi, Hassan S

publication date

  • January 2020