Abstract
Five new dithienylethenes decorated with purine and pyrimidine derivatives have been conveniently synthesized via a facile one-pot process. All new compounds were characterized by 1H NMR, 13C NMR, ultraviolet–visible spectroscopy and high-resolution mass spectrometry. Their photophysical properties and photochromic behavior were investigated in detail. These compounds exhibit reversible photochromism with good photocyclization/photocycloreversion quantum yields and considerable molar extinction coefficients. The result shows that the introduction of purine and pyrimidine derivatives into the dithienylethene unit has a remarkable effect on their performance, such as photoinduced fatigue resistance, photocyclization/photocycloreversion quantum yields and molar extinction coefficient.
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