摘要

A new 7-nitrobenz-2-oxa-1,3-diazole (NBD) derived fluorescent probe (1) exhibiting high selectivity for Cu2+ detection, produced significant fluorescence quenching in the presence of Cu2+ ion, while the metal ions Ca2+, Cd2+, Co2+, Fe2+, Hg2+, Mg2+, Mn2+, Ni2+ and Zn2+ produced only minor changes in fluorescence. The apparent association constant (K (a)) for Cu2+ binding in chemosensor 1 was found to be 1.22 x 10(3) M-1. The maximum fluorescence quenching activity caused by Cu2+ binding to 1 was observed over the pH range 6-10.

  • 出版日期2011-7