A new photochromic diarylethene bears two chiral carbon atoms was designed and synthesized. This compound keeps in
liquid state at room temperature which is the first example for 1,2-dithienylalkene derivatives to our knowledge. Owning
to the liquid state, this compound undergoes a much faster reversible photochromic reaction than some
1,2-dithienylalkene derivatives in solid state, at ambient temperature. In addition, the fluorescence property and the uses
of this compound in photo switches and non-reductive storage material were discussed.
Diarylethene is a promising material for future high-density, high-speed, photo-mode storage because of their intriguing
properties such as thermal stability and fatigue resistance. However, the practical application requires more endeavors
since there are some flask-necked problems still unsolved. Among these problems, nondestructive readout is the most
noticeable though several strategies for circumventing this problem have been proposed. Herein, we reported our work
toward the most convenient nondestructive data processing -- UV-Vis readout. For this purpose, a novel family of
diarylethene (DTE)-phthalocyanine (Pc) dyad system was designed and synthesized. In these molecules, DTE serve as
the "write moiety" while the Pc serve as "read moiety". It is found that the significant change in the extension of linear
π-conjugation of the DTE when irradiated by 254 nm UV light directly made the absorption of the Q-band of
phthalocyanine decreases. Detecting the absorption changes of the Q-band cannot induce the reversible photochromic
reaction. Therefore, non-destructive readout is feasible based on the spectral changes of the Q-band when such materials
were used as storage media
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