Chan KM, Kölmel DK, Wang S, Kool ET. Color-Change Photoswitching of an Alkynylpyrene Excimer Dye.
Angew Chem Int Ed Engl 2017;
56:6497-6501. [PMID:
28474388 PMCID:
PMC5665017 DOI:
10.1002/anie.201701235]
[Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 03/20/2017] [Indexed: 01/06/2023]
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.
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