Loading...
Please wait, while we are loading the content...
Similar Documents
Simultaneous spectrophotometric analysis of aliphatic amines utilizing thermochromism of charge-transfer complexes with tetrabromophenolphthalein ethyl ester.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Sakai, Tadao Kato, Mitushiro Teshima, Norio |
| Copyright Year | 2005 |
| Abstract | Aliphatic amines, such as n-hexylamine (primary), di-n-hexylamine (secondary) and tri-n-hexylamine (tertiary amine), react with tetrabromophenolphthalein ethyl ester molecules (TBPEH) to form reddish or red-violet charge-transfer complexes (CT complexes) in 1,2-dichloroethane (DCE). The absorption maxima of the CT complexes with all primary amines occur at around 560 nm, with secondary amines at 570 nm and, with tertiary amines at 580 nm. The CT complex formation constants with TBPEH in DCE increase in the order of the primary, secondary and tertiary amines, but their constants decrease quantitatively with an increase in temperature. This phenomenon (thermochromism) could be applied to the simultaneous spectrophotometric determination of primary amine and secondary amine, or secondary amine and tertiary amine in a mixed solution utilizing the difference of absorbance with temperature changes. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.jstage.jst.go.jp/article/analsci/21/12/21_12_1557/_pdf |
| PubMed reference number | 16379407v1 |
| Volume Number | 21 |
| Issue Number | 12 |
| Journal | Analytical sciences : the international journal of the Japan Society for Analytical Chemistry |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Addison Disease Amine Oxidase (Copper-Containing) Amines Diabetes Insipidus Esters Maximum Myocardial Diseases, Secondary Trimipramine Viola |
| Content Type | Text |
| Resource Type | Article |
