A water-soluble fluorescent sensor, 1, based on the âreceptor-spacer-fluorophoreâ [2-(2â²-aminophenyl)benzoxazole-amide-2-picolylamine] sensor platform, demonstrates the high sensitivity for Zn2+ with a 25-fold fluorescence enhancement upon chelation to Zn2+ and also exhibits high selectivity to Zn2+ over other metal ions. X-ray crystal structure of Zn2+ complex reveals that the amide oxygen (O2) cooperates with 2-picolylamine unit (N3, N4) as a receptor bind Zn2+.
基于 "受体-间隔物-荧光团"[2-(2â²-氨基苯基)苯并恶唑-酰胺-2-匹考基胺]传感器平台的水溶性荧光传感器1对Zn2+具有高灵敏度,与Zn2+螯合后荧光增强25倍,对Zn2+的选择性也高于其他金属离子。Zn2+ 复合物的 X 射线晶体结构显示,酰胺氧(O2)与 2-双酚胺单元(N3、N4)合作作为受体结合 Zn2+。