Fully Reversible Multistate Fluorescence Switching: Organogel System Consisting of Luminescent Cyanostilbene and Turn‐On Diarylethene

Abstract

Multicolor tunable and multistate switchable organogel is reported, which consists of a cyanostilbene organogelator showing aggregation‐induced enhanced emission and a turn‐on type photochromic diarylethene dye. The mixed organogel can be reversibly switched among four different states (blue‐emitting gel, nonemissive sol, green‐emitting gel, and green‐emitting sol) modulated by a combination of orthogonal stimuli of heat and light. It is interestingly noted that this four‐state switching constitutes a combinational logic circuit consisting of two stimuli inputs and three outputs. Reversible fluorescence writing, switching, erasing, and image patterning processes on this mixture gel system are demonstrated.

Mechanistic Insights into the Self‐Assembly of an Acid‐Sensitive Photoresponsive Supramolecular Polymer

“…[9] Successful candidates are often used as sensors, [10] switches, [11] as well as for drug delivery. [12] In particular,l ight-responsive organogelators derived from azobenzenes, [13] spiropyrans [14] and diaryethenes [15] have been widely exploited in the field of self-assembled materials due to their potentiala pplication in the area of storagea nd secret documentation. [16] The trans-to-cis photoisomerization of the azobenzene groupsh as been used to reversibly control gel-sol transitions, which eventually has produced smartp hotoresponsive materials.…”

Stimuli responsive dynamic transformations in supramolecular gels

“…Recently, Park and co-workers introduced a reversible and multistate addressable fluorescent organogel formed by the mixing of spiropyran and diarylethene gelators. 143 In the co-assembled gel, while the spiropyran switching can be thermally activated, the diarylethene dopant exhibited selective photoinduced turn-on switching. A combinational logic gate circuit was established by applying these two orthogonal stimuli (heat and light) that allowed access to different gel states with different fluorescence colours.…”

Optical microresonator arrays of fluorescence-switchable diarylethenes with unreplicable spectral fingerprints

“…The hemispherical microresonators are made of fluorescent photochromic diarylethenes (DAEs). [22][23][24][25][26][27][28][29][30] Each hemispherical pixel displays WGM photoluminescence (PL), and all the WGM fingerprints are different from one another. The microsphere resonators display WGM luminescence that is switchable upon photoisomerization with UV/visible photoirradiation.…”