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	TEA法测定NO_2的反应机理研究; Reaction mechanism of NO2 determination by the TEA method
	李密 ; 张新祥 ; 应立明 ; 赵新生
	1999
关键词	三乙醇胺硝酸盐 三乙醇胺亚硝酸盐 反应机理 分子加合物 triethanolamine nitrate triethanolamine nitrite reaction mechanism molecular addition compound
英文摘要	应用 FABMS、 NMR、 IR、 HPL C和紫外吸收光谱研究了室温下三乙醇胺与较高浓度 NO2(2 .4 8% )的反应情况 ,证明反应产物为三乙醇胺硝酸盐和三乙醇胺亚硝酸盐 ,提出了可能的反应机理 ,为 TEA法监测空气中 NO2 的浓度提供了依据 .; The reaction of triethanolamine(TEA) with NO2 was investigated at room temperature, The reaction products were characterized by FABMS, NMR, FTIR, HPLC and UV spectra, It was found that triethanolamine nitrate and triethanolamine nitrite are the main products of the reaction, ((HOCH4)-H-2)(3)NH+ was identified based an FABMS, H-1 NMR, and C-13 NMR spectra, Meanwhile, NO3- and NO2- were also determined by FTIR, HPLC and UV spectra, The quantitative relationship between TEA and NO2 that infolved in the reaction was determined by experiments, It was found that when TEA was reacted with NO, in CHCl3 with the exclusion of water, a white precipitate formed immediately on addition of NO2, this precipitate could solve easily in strong polarized solvents such as water. Triethanolamine nitrate was obtained through TEA reacted with HNO3 in CHCl3 at room temperature, moreover the comparison of its spectra and the ones of the products was made. A possible reaction mechanism was proposed to explain the experimental results, Because N2O4 molecule is electron deficient while TEA contains atoms which have one or more lone pairs of electrons available in s or p orbitals, a molecular addition compound might be the reactive intermediate, which can easily be hydrolyzed to give the final products. This reaction mechanism requires a stoichiometric factor of 0.5 for the conversion of gaseous NO2 to nitrite ion, which is in agreement with literature values.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000084320500026&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); EI; 中文核心期刊要目总览(PKU); 中国科学引文数据库(CSCD); 2; 12; 1940-1944; 20
语种	中文
出处	SCI ; 知网 ; 万方
出版者	高等学校化学学报
内容类型	其他
源URL	[http://hdl.handle.net/20.500.11897/78526]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	李密,张新祥,应立明,等. TEA法测定NO_2的反应机理研究, Reaction mechanism of NO2 determination by the TEA method. 1999-01-01.

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