Stress and light sensitive dual-mechanical property of acylhydrazone crystal

Abstract

Mechanically dual-responsive molecular crystals substantially gained interest among researchers due to their significant application in various fields. Incorporation of disparate mechanical responses in the same crystalline material is still a...

Photoinduced Crystal-to-Liquid Transition of Acylhydrazone-Based Photoswitching Molecules

“…Notably, during the observation at T m ( Z ) – 50 °C and T m ( Z ) – 60 °C under UV irradiation, when the crystal bent to a certain degree, a part of the crystal hopped away from the original position, thus exhibiting a photosalient effect (Figure S25 and Video S3). Similar photomechanical behaviors were reported for acylhydrazide derivatives by some research groups, who suggested a mechanism based on the E -to- Z isomerization. − The present NC cases provide valuable contributions to these behaviors because the crystal structures of both isomers are available.…”

“…For example, Aprahamian et al. achieved control of their thermal half-lives in the range of days to thousands of years and high conversion yield over 90%. , Similar high photoswitching performances have been observed for acylhydrazones. , Notably, acylhydrazones are often distinguished from hydrazones due to their molecular structures being less restricted between the E -form and Z -form. ,− Furthermore, acylhydrazones exhibit photoisomerization even in a solid state − and thereby are promising candidates for PCLT-active crystals. However, to the best of our knowledge, there have been no reported examples of such applications of acylhydrazones.…”

Linker size dependent mechanical properties of di-imine based molecular crystals

“…Crystals 1 and 2 were plastic, crystal 3 was brittle and lastly, crystal 4 was rendered elastic in nature. 28,29 In all cases, aldehydes were the same as 3,5-di- tert -butylsalicylaldehyde but the length of the linker in the molecule differs (Fig. 1a–d).…”

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

“…For example, Ghosh's group, Hao's group, and other teams discovered multi-stimulus responsive flexible crystals and our group demonstrated the photomechanical behavior of needle-like elastic crystals. 34–41…”