使用季戊四胺与水杨醛、邻香兰素缩合反应得到了两种席夫碱化合物1和2.化合物1和2均可用于不同水样Fe(Ⅱ)和Fe(Ⅲ)离子的比色识别.通过光谱滴定及液质谱联用等方法研究了化合物1和2与Fe(Ⅲ)的识别作用,化合物1和2与Fe(Ⅲ)离子的配位比为1∶1,对Fe(Ⅲ)铁离子的检出限分别为0.19和0.21 μmol·L-1,低于世界卫生组织饮用水检出标准(5μmol·L-1),具有一定的实用价值.%Two colorimetric sensors,derived from pentaerythrityhetramine and salicylaldehyde (1) or o-vanillin (2),had been synthesized.Both sensors showed selective colorimetric sensing ability for Fe(Ⅱ) and Fe(Ⅲ) by changing color from light yellow to either orange or purple when immersed in water samples.The sensors coordinated to Fe(Ⅲ) with 1∶1 stoichiometry,as has been confirmed from the results of LC-MS spectrometry and UV-Vis spectrum titration.The detection limits of sensors 1 (0.19 μmol ·L-1) and 2 (0.21 μmol·L-1) are lower than the WHO guideline (5 μmol· L-) in drinking water.
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