172872-73-0Relevant articles and documents
Photoresponsive cesium ion tweezers with a photochromic dithienylethene
Takeshita, Michinori,Irie, Masahiro
, p. 613 - 616 (1998)
Novel molecular tweezers having two 18-crown-6 moieties as recognition sites and dithienylethene as a photoswitch reversibly changed the affinity for cesium ion by photoirradiation.
Reversible red fluorescent molecular switches
Bossi, Mariano,Belov, Vladimir,Polyakova, Svetlana,Hell, Stefan W.
, p. 7462 - 7465 (2007/10/03)
I see red, I see red, I see red: Optically switchable compounds were synthesized whose visible fluorescence can be quenched down to 6% with light at 360-400 nm and then restored with red light from a diode laser. The molecular switch offers potential applications in data storage and far-field microscopy with spatial resolution far below the diffraction limit. (Chemical Equation Presented).
Synthesis of fluorescent diarylethenes having a 2,4,5-triphenylimidazole chromophore
Yagi,Chai Fong Soong,Irie
, p. 5419 - 5423 (2007/10/03)
Diarylethenes 1a-4a, having a fluorescent 2,4,5-triphenylimidazole chromophore in the aryl group, were synthesized. Upon excitation of the triphenylimidazole chromophore with 366 nm, 1a-4a underwent photocyclization reactions, and the solutions containing 1a-4a changed color from colorless to red-purple or to blue. The colors disappeared by irradiation with visible (λ > 480 nm) light. The fluorescence intensity of the solutions also reversibly changed with the photochromic reactions. The fluorescence quantum yields of 1a, 2a, 3a, and 4a were determined to be 4.6, 7.7, 9.1, and 8.4%, respectively. The fluorescence quantum yields decreased with the increase in photocyclization quantum yields.
