Color-Change Photoswitching of an Alkynylpyrene Excimer Dye.

Color-Change Photoswitching of an Alkynylpyrene Excimer Dye.
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DOI:
10.1002/anie.201701235
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发表时间:
2017-06-01
期刊:
Angewandte Chemie (International ed. in English)
影响因子:
--
通讯作者:
Kool ET
Kool ET
中科院分区:
其他
文献类型:
--
作者:
Chan KM;Kölmel DK;Wang S;Kool ET

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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. DNA-based Photoswitch: We describe a DNA-based dimeric dye that visibly changes color from green to blue upon UV irradiation. A novel bis-alkyne-dependent [2+2+2] cycloaddition with oxygen is proposed as a mechanism for the color change in air. We demonstrate and suggest several applications for this novel photoswitch.
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