Synthesis of novel AIEE active pyridopyrazines and their applications as chromogenic and fluorogenic probes for Hg<sup>2+</sup> detection in aqueous media
作者:Shalu Gupta、Marilyn D. Milton
DOI:10.1039/c7nj04573e
日期:——
PP2) act as excellent “turn-on” fluorescent probes while those bearing electron-donating biphenyl rings (PP3 and PP4) act as excellent “turn-off” fluorescent probes for Hg2+ ions in non-buffered aqueous media with high selectivity in the presence of competitive metal ions such as Na+, K+, Mg2+, Ca2+, Ba2+, Cr3+, Fe3+, Fe2+, Co2+, Ni2+, Cu2+, Ag+, Zn2+, Cd2+, Al3+ and Pb2+. A visual color change from
以优异的产率合成了一系列新颖的吡啶并吡嗪衍生物。所有化合物在溶液中均显示弱荧光发射,但在聚集状态下显示强发射,表明聚集诱导的发射增强(AIEE)特性。PP1的单晶分析显示高度扭曲的构象,没有π–π堆积相互作用。还报道了这些吡啶并吡嗪作为发色和荧光探针在检测Hg 2+离子中的应用。带有吸电子联苯环(PP1和PP2)的吡咯并吡嗪衍生物是出色的“开启”荧光探针,而带有吸电子联苯环(PP3和PP4)的吡咯并吡嗪衍生物则是出色的“开启”荧光探针。)在非竞争性水性金属离子(例如Na +,K +,Mg 2 +,Ca 2 +,Ba 2)存在下,可作为非封闭型水性介质中Hg 2+离子的出色“关闭”荧光探针+,Cr 3+,Fe 3+,Fe 2 +,Co 2 +,Ni 2 +,Cu 2 +,Ag +,Zn 2 +,Cd 2 +,Al 3+和Pb 2+。汞2+处理后,视觉颜色从无色变为黄色还观察到所有探针;因此,它们还可用于肉眼检测Hg