一种用于识别氟离子和醋酸根离子的新型红外化学传感器

A Novel Infrared Chemosensor for Recognition of Fluoride and Acetate Anions

合成了一种具有潜在红外化学传感功能的新型金属有机分子———N’-(2-吡啶基)-N-苯基脲三羰基铬。借助核磁共振、质谱和元素分析手段对其结构进行了精确表征。该分子对两种重要的阴离子氟离子(F-)和醋酸根离子(CH3COO-)显示出良好的识别与红外传感性能。研究结果表明,在氯仿体系中,当两种阴离子浓度大于10-5 mol.L-1时,分子中的金属羰基作为高效的红外报告基团,其伸缩振动峰的位置与阴离子的浓度存在良好的线性关系。利用测定的工作曲线,可以对两种阴离子含量进行红外滴定,结果证明该分子可对F-和CH3COO-进行准确、灵敏的痕量探测,测量误差均低于5%。

A novel organometallic chromophore with potential infrared（IR） chemical sensing property,named as N＇-（2-pyridinyl）-N-phenylurea tricarbonyl chromium,was synthesized and systematically characterized by nuclear magnetic resonance（NMR）,mass spectra（MS） and elemental analysis.The recognition and IR sensing behavior toward fluoride and acetate anions was investigated in chloroform.The results of IR titration indicated that,when the concentration of the two anions was greater than 10-5 mol·L-1,a good linear relationship between the stretching vibration of metal carbonyl of N＇-（2-pyridinyl）-N-phenylurea tricarbonyl chromium and the concentration of the two anions was observed,which exhibits expected application in trace analysis of fluoride and acetate with detection error less than 5%.