A series of monostyryl boron dipyrromethenes appended with an NO4, NO2S2, N3O4, or N3O2S2-type ligand have been prepared and characterised. While the UV-Vis spectra of the former three compounds in CH3CN/H2O (2 : 3 v/v) do not respond towards a wide range of metal ions, the derivative with an N3O2S2-ligand exhibits a highly selective and sensitive spectral response towards Hg2+ ions. The absorption band is blue-shifted by 40 nm due to inhibition of the intramolecular charge transfer process upon metal complexation. The fluorescence is also turned on giving a strong emission band at 572 nm. The colour changes can be easily detected by the naked eye. The results suggest that this compound serves as a promising colourimetric and fluorescent sensor for Hg2+ ions in this mixed aqueous medium.
我们制备了一系列附加有
NO4、
NO2S2、N3O4 或
N3O2S2- 型
配体的单
苯乙烯基
硼二
吡咯烷酮,并对其进行了表征。前三种化合物在 CH3CN/
H2O(2:3 v/v)中的紫外可见光谱对多种
金属离子没有反应,而带有 S2
配体的衍
生物则对 Hg2+ 离子表现出高度选择性和灵敏的光谱反应。由于
金属络合时分子内电荷转移过程受到抑制,吸收带蓝移了 40 纳米。同时,荧光也被打开,在 572 纳米处产生一个强发射带。肉眼很容易检测到颜色的变化。结果表明,这种化合物是一种很有前途的混合
水介质中 Hg2+ 离子的比色和荧光传感器。