Color-Change Photoswitching of an Alkynylpyrene Excimer Dye
Ke Min Chan1, Dominik K Kölmel1, Shenliang Wang1
1Department of Chemistry, Stanford University, Stanford, CA, 94305, USA.
Angewandte Chemie (International Ed. in English)
|May 6, 2017
Abstract:
We describe a photoswitchable DNA-based dimeric dye that visibly changes fluorescence from green to blue upon UV irradiation. A novel bis-alkyne-dependent [2+2+2] cycloaddition is proposed as a mechanism for the color change in air. The photoinduced structural switching results in spatial separation of stacked pyrene units, thereby causing selective loss of the excimer emission. We demonstrate and suggest several applications for this novel photoswitch.


