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Design and Synthesis of an o-Hydroxyphenyl-Containing Spiropyran Thermochromic Colorant

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journal contribution
posted on 16.04.2009, 00:00 by Jhih-Rong Chen, Ding-Yah Yang
An o-hydroxyphenyl-containing spiropyran thermochromic colorant was designed and synthesized. The prepared compound is sensitive to temperature and has a reversible color change with temperature variation. X-ray diffraction analysis and variable-temperature NMR studies suggest that the thermochromism of the compound presumably involved a ring-opening C−O bond cleavage of the spiropyran moiety followed by an intramolecular hydrogen transfer.