CLARITY, The Centre for Sensor Web Technologies, National Centre for Sensor Research, School of Chemical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland.
Analyst. 2011 Jan 21;136(2):348-53. doi: 10.1039/c0an00770f. Epub 2010 Oct 20.
This work details the use of a 2-component optode membrane which is capable of generating three distinct colours in the presence of Cu(2+) and Co(2+) ions. It has been found that the ionic liquid (IL) trihexyltetradecylphosphonium dicyanamide [P(6,6,6,14)][DCA] can act as plasticizer, ligand and transducer dye when used in poly(vinyl chloride) (PVC) membranes, which significantly simplifies the optode membrane cocktail. Upon exposure to an aqueous Cu(2+) solution, a yellow colour is generated within the membrane, while exposure to an aqueous Co(2+) solution generates a blue colour. Exposure to a solution containing both ions produces a green colour. Vibrational spectroscopy has been used to investigate the molecular basis of the IL-metal ion the binding mechanism. Analytical characteristics of the membranes including the effect of interfering ions, binding constants and the limit of detection for both ions have been estimated. Finally the case of simultaneous dual-analyte recognition is presented based on two distinct absorption maxima.
这项工作详细介绍了一种由两部分组成的光纤传感器膜的应用，该光纤传感器膜在存在 Cu(2+) 和 Co(2+) 离子的情况下能够产生三种不同的颜色。研究发现，离子液体（IL）三己基十四烷基磷酸二氰胺[P(6,6,6,14)][DCA] 在聚氯乙烯（PVC）膜中可用作增塑剂、配体和传感器染料，这大大简化了光纤传感器膜混合物。当暴露于含 Cu(2+) 的水溶液中时，膜内会产生黄色，而暴露于含 Co(2+) 的水溶液中则会产生蓝色。当暴露于同时含有两种离子的溶液中时，会产生绿色。振动光谱已被用于研究 IL-金属离子结合机制的分子基础。对膜的分析特性，包括干扰离子的影响、结合常数以及两种离子的检测限进行了评估。最后，根据两个不同的吸收峰，提出了同时双重分析物识别的案例。
