化学
光致变色
摩尔吸收率
多环芳烃
光化学
碳氢化合物
检出限
光异构化
紫外线
激发波长
有机化学
波长
催化作用
色谱法
异构化
材料科学
光电子学
物理
光学
作者
Walmiria Woodland,Cherie A. Motti,Paul Irving,Lynne van Herwerden,George Vamvounis
摘要
The colorimetric detection of polycyclic aromatic hydrocarbons (PAHs) was achieved using photochromic compounds. This technique exploits the ability of the photochromic compound to reversibly change from a colourless to a coloured compound using ultraviolet light and visible light. In the presence of a PAH, this photoisomerization is inhibited. The degree of inhibition corresponded to the molar absorptivity and excitation wavelength of the PAH, and with a limit of detection in the micromolar range, the current method delivers a highly sensitive and selective technology. In addition, PAH mixtures were successfully identified using this method, providing a potentially fast in-field sensing technology for the identification of likely sources of spilled oil.
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