Visualization of Molecular Length of α, ω-Diamines and Temperature by a Receptor Based on Phenolphthalein and Crown Ether (SYNTHETIC ORGANIC CHEMISTRY-Fine Organic Synthesis)
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The hybrid molecule 1 consisting of phenolphthalein and crown ether moieties can discriminate the chain length of the α,ω-diamines by color change, while 2 can not. Thus, it is suggested that two crown ether part are necessary to visualize the chain length by the color. The pink color faded at 50 °C and reappeared at 20 °C, which could repeated more than 10 times.
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