Exploiting the deprotonation mechanism for the design of ratiometric and colorimetric Zn2+ fluorescent chemosensor with a large red-shift in emission
作者:Zhaochao Xu、Xuhong Qian、Jingnan Cui、Rong Zhang
DOI:10.1016/j.tet.2006.08.050
日期:2006.10
thoroughly quenched by Cu2+, Co2+, and Ni2+. The addition of other metal ions such as Li+, Na+, K+, Mg2+, Ca2+, Fe3+, Mn2+, Al3+, Cd2+, Hg2+, Ag+, and Pb2+ produced a nominal change in the optical properties of 1 due to their low affinity to probe 1. This means that probe 1 has a very high fluorescent imaging selectivity to Zn2+ among metal ions.
一种基于萘二甲酰亚胺的新型荧光化学传感器,N-丁基-4- [二-(2-甲基吡啶基)氨基] -5-(2-甲基吡啶基)氨基-1,8-萘二甲酰亚胺的设计,合成和光物理评估(1),描述了在pH 7.0的乙腈水溶液中检测Zn 2+的方法。探头1表明吸收峰位置451 nm和537纳米(强荧光发射Φ ˚F = 0.33)。受体对Zn 2+的捕获导致与1,8-萘二甲酰亚胺共轭的仲胺的去质子化,从而大大提高了N原子的供电子能力。因此,探针1的吸收(507 nm)和荧光光谱(593 nm,Φ ˚F = 0.14),分别从其中一个可以感觉到的Zn 2+ ratiometrically和色度。的去质子化的配合物,[(1 -H)/锌] +,在计算米/ Ž 619.1800,并在测得的米/ ž 618.9890。与这些结果相反,1的发射被Cu 2 +,Co 2+和Ni 2+彻底淬灭了。添加其他金属离子,例如Li +,Na