作者:Shi-Rong Liu、Shu-Pao Wu
DOI:10.1007/s10895-011-0848-9
日期:2011.7
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 × 103 M−1. The maximum fluorescence quenching activity caused by Cu2+ binding to 1 was observed over the pH range 6–10.
一种新型7-硝基苯并-2-氧杂-1,3-二氮杂环(NBD)衍生的荧光探针(1)表现出了对Cu2+检测的高选择性,在存在Cu2+离子的情况下产生了显著的荧光淬灭,而Ca2+、Cd2+、Co2+、Fe2+、Hg2+、Mg2+、Mn2+、Ni2+和Zn2+离子仅导致荧光发生轻微变化。在化学传感器1中,与Cu2+结合的表观结合常数(K a)被发现为1.22 × 103 M−1。在pH 6-10范围内观察到了Cu2+与1结合导致的最大荧光淬灭活性。