@article {49655, title = {Simultaneously mechanically flexible, photobending, and acidochromic cyanostilbene molecular crystals}, journal = {Crystal Growth \& Design}, volume = {25}, year = {2024}, month = {DEC}, pages = {309-318}, type = {Article}, abstract = {

Molecular crystals that respond to multiple stimuli are gaining significant attention for their potential in smart materials like actuators and sensors. However, imparting multiple stimuli-responsive properties to a single crystal remains a major challenge. Herein, we report two cyanostilbene derivative-based crystals 1 and 2, with various responses to stimuli such as mechanical stress, light, acid vapors, etc. Both crystals 1 and 2 demonstrated mechanical flexibility and reversible acidochromism. Additionally, crystal 1 also exhibited light-induced photobending, which is ascribed to Z to E photoisomerization. Detailed structure-property correlation was established to unravel distinct mechanical responses. The development of these multitasking crystals may find applications in multitasking actuators, anticounterfeiting materials, and more.

}, issn = {1528-7483}, doi = {10.1021/acs.cgd.4c01341}, author = {Parthasarathy, Thiyagaraj and Mishra, Manish Kumar and Bhattacharya, Biswajit and Emmerling, Franziska and Ghosh, Soumyajit} } @article {50116, title = {Helically twistable cyanoacrylate crystal with simultaneous photomechanical bending}, journal = {Chemical Communications}, volume = {62}, year = {2026}, month = {MAY}, pages = {8661-8664}, type = {Article}, abstract = {

A cyanoacrylate derivative crystal exhibits an unusual combination of one-dimensional elasticity, plasticity, and reversible hand-held twisting. Twisting induces a reversible single crystal to polycrystal transition. It also displays photobending via a cycloaddition reaction under 365 nm irradiation and thermally recovers its original state, retaining functionality in the twisted state, indicating potential applications in soft robotics and smart actuators.

}, issn = {1359-7345}, doi = {10.1039/d6cc00942e}, author = {Parthasarathy, Thiyagaraj and Bhowmik, Aritra and Mishra, Manish Kumar and Ghosh, Soumyajit} } @article {49943, title = {Reversible twisting-induced crystalline-polycrystalline transformation in cyanoacrylate crystals}, journal = {Chemical Communications}, volume = {62}, year = {2026}, month = {JAN }, pages = {264-267}, type = {Article}, abstract = {

We report cyanoacrylate-based organic crystalline materials that exhibit reversible hand-induced helical twisting through the combined action of 1D elasticity and 2D plasticity. These crystals twist and untwist without lattice damage, retaining their elastic integrity through pi slip-stacking and Cl \& ctdot;Cl, C-H \& ctdot;Cl, and Me \& ctdot;Me interactions. Their unique integration of elastic recovery, plastic bending, and reversible twisting highlights their potential as mechanically adaptive materials for flexible and responsive devices.

}, issn = {1359-7345}, doi = {10.1039/d5cc05852j}, author = {Parthasarathy, Thiyagaraj and Bhowmik, Aritra and Bhattacharya, Biswajit and Mishra, Manish Kumar and Ghosh, Soumyajit} }