Photoactuation, photochromism and acidochromism of styrylindazole-based crystalline materials

Multi-site isomerization of synergistically regulated stimuli-responsive AIE materials toward multi-level decryption

“…Accordingly, molecules with strong ICT effects could exhibit low oscillator strength between the excited and ground states, leading to nonradiative transitions that may quench its fluorescence. 61,62 After TEA vapor fuming for 5 minutes, the emission is almost completely recovered because of deprotonation progress to the initial state. To further explore the mechanism of ACL, UV absorption and NMR tests were conducted on this isomer before and after acid treatment.…”

Dual control of passive light output direction by light and mechanical forces in elastic crystals

“…21 In recent years, there has been an increasing number of studies on the photo-driven mechanical behaviors of organic molecular crystals, such as trans – cis isomerization of azobenzene, photocyclization of diarylene, [2 + 2] cycloaddition of olefins, [4 + 4] photodimerization of anthracene, and so on. 22–31 However, due to their brittle and hard properties, most organic molecular crystals are prone to fracture under external forces or motions. 32 As a result, researchers have attempted to disperse mechanical stresses by preparing small-sized crystals.…”

Superelastic and Photomechanical Behavior of Acylhydrazone Derivative Crystals

“…Later, in 1964, Schmidt et al developed the concept of “topochemistry” by studying the solid-state photochemical reactions of cinnamic acid derivatives . Since then, the photomechanical effects of organic crystals have been extensively studied. − Many studies have described [2 + 2] cycloaddition reactions involving olefins, − isomerization processes such as trans ( E )– cis ( Z ) isomerization in diarylethenes or azobenzenes, − [4 + 4] photodimerization reactions occurring in anthracene, − and ring opening and closing of diarylethenes, − leading to photoinduced mechanical responses in organic molecular crystals.…”