Optical sensor for amine vapors based on dimer-monomer equilibrium of indium(III) octaethylporphyrin in a polymeric film

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	Optical sensor for amine vapors based on dimer-monomer equilibrium of indium(III) octaethylporphyrin in a polymeric film
	Qin Wei ; Parzuchowski P ; Zhang W ; Meyerhoff ME.
发表期刊	Analytical Chemistry
	2003-01-05
卷号	75 期号:2 页码:332-340
关键词	Selective Membrane Electrodes Amperometric Detection Aliphatic-amines Optode Membranes Metalloporphyrin Ammonia
产权排序	Univ Michigan, Dept Chem, Ann Arbor, MI 48109 USA
通讯作者	Meyerhoff, ME (通讯作者),Univ Michigan, Dept Chem, Ann Arbor, MI 48109 USA
英文摘要	A novel transduction chemistry for the development of a polymer film-based optical sensor that responds reversibly to gas-phase amine species at sub-ppm levels is described. The sensor is based on the equilibrium of a indium(III) octaethylporphyrin hydroxide ion-bridged dimer species with corresponding monomeric porphyrins within a thin poly(vinyl chloride) film as a function of the level of volatile amine in the surrounding gas phase. The presence of amines causes the dimeric species to be converted to monomer via the ligation of the amine with the In(III) center of the porphyrin structure. This yields a significant change in the visible absorption spectrum of the film, with a decrease in the intensity of the Soret band corresponding to the dimer (lambdamax = 390 nm) and a concomitant increase in the Soret band for the monomer lambdamax = 406-408 nm). Response to different amines is based on their relative partition coefficient into the polymer film and their strength of axial ligation reactions, with a selectivity pattern of 1-butylamine > 1-propylamine > pyridine > triethylamine > ethylamine > methylamine > diethylamine > tert-butylamine > ammonia. It is further shown that a significant concentration of dimeric species within the polymer film can only be achieved if appropriate amounts of lipophilic anionic sites are also incorporated into the polymer in the form of a tetraphenylborate derivative and the resulting film is equilibrated briefly with water prior to gas-phase measurements. With optimized film compositions, 1-butylamine can be detected in the gas phase to levels approaching 0.1 ppm, while less lipophilic ammonia can be monitored down to 10 ppm, with fully reversible responses to each species. A simple mathematical model for the response of the amine sensor is presented and shown to predict the optical behavior observed.
收录类别	SCI
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/5162
专题	科研共享资源中国科学院海岸带环境过程与生态修复重点实验室
推荐引用方式 GB/T 7714	Qin Wei,Parzuchowski P,Zhang W,et al. Optical sensor for amine vapors based on dimer-monomer equilibrium of indium(III) octaethylporphyrin in a polymeric film[J]. Analytical Chemistry,2003,75(2):332-340.
APA	Qin Wei,Parzuchowski P,Zhang W,&Meyerhoff ME..(2003).Optical sensor for amine vapors based on dimer-monomer equilibrium of indium(III) octaethylporphyrin in a polymeric film.Analytical Chemistry,75(2),332-340.
MLA	Qin Wei,et al."Optical sensor for amine vapors based on dimer-monomer equilibrium of indium(III) octaethylporphyrin in a polymeric film".Analytical Chemistry 75.2(2003):332-340.

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