Department of Physics, Faculty of Science, Gebze Institute of Technology, 41400 Gebze-Kocaeli, Turkey.
Talanta. 2009 Nov 15;80(1):263-8. doi: 10.1016/j.talanta.2009.06.064. Epub 2009 Jul 4.
The effect of volatile organic compounds (VOCs) such as acetone, methanol, ethanol, chloroform, carbon tetrachloride, dichloromethane, and hexane on electrical conductivity of thin films of bis[tetrakis(alkylthio)phthalocyaninato]lutetium(III) double decker complexes (C(n)H(2n+1)S)(4)PcLu(III) was investigated. The (C(n)H(2n+1)S)(4)PcLu(III) molecules substituted with different alkylthia chains (n=6, 8, 10, 12, and 16) were coated on interdigital transducers using a jet spray technique. A change (increase or decrease) in the conductivity of the (C(n)H(2n+1)S)(4)PcLu(III) films was observed depending on the concentration of the VOCs, which was ranging from 500 to 5000 ppm. The decrease in the conductivity of the sensors for the dissolvent of the compounds (chloroform, carbon tetrachloride, dichloromethane and hexane) could be related to swelling of the films. On the other hand, the increase in the conductivity of the sensors for the other VOCs (acetone, methanol and ethanol) could be resulted from that the VOCs act as electron donors and/or acceptors in the films. A linear relationship between the sensor response and concentration of the VOC vapors is obtained. The sensitivities of the (C(n)H(2n+1)S)(4)PcLu(III) films were in the range of 2.10(-4)-3.10(-3)%/ppm.
研究了挥发性有机化合物（VOCs）如丙酮、甲醇、乙醇、氯仿、四氯化碳、二氯甲烷和正己烷对双[四（烷基硫代）酞菁基]镥（III）双层配合物[（C（n）H（2n+1）S）（4）Pc]（2）Lu（III）薄膜电导率的影响。用喷射喷雾技术将不同烷基硫链取代的[（C（n）H（2n+1）S）（4）Pc]（2）Lu（III）分子涂覆在叉指换能器上。[（C（n）H（2n+1）S）（4）Pc]（2）Lu（III）薄膜的电导率发生变化（增加或减少），这取决于 VOCs 的浓度，范围为 500 至 5000 ppm。化合物的溶剂（氯仿、四氯化碳、二氯甲烷和正己烷）的传感器电导率的降低可能与薄膜的溶胀有关。另一方面，对于其他 VOCs（丙酮、甲醇和乙醇），传感器电导率的增加可能是由于 VOCs 在薄膜中充当电子供体和/或受体。传感器响应与 VOC 蒸气浓度之间存在线性关系。[（C（n）H（2n+1）S）（4）Pc]（2）Lu（III）薄膜的灵敏度范围为 2.10（-4）-3.10（-3）%/ppm。
