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Visual Recognition of Triamines by Phenolphthalein Derivatives:  Consideration of the Structure of the Colored Complex

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journal contribution
posted on 21.11.2001, 00:00 by Kazunori Tsubaki, Noriyuki Hayashi, Mohammad Nuruzzaman, Tomokazu Kusumoto, Kaoru Fuji
A hybrid molecule 1 consisting of phenolphthalein and two crown ether moieties can be used to discriminate the length of linear triamines strictly by color development. The purple color is developed most deeply at −10 °C and fades with either an increase or decrease in temperature.