Bending, Jumping, and Self‐Healing Crystals

Distinct photomechanical responses of two new 1,3-dimethylbarbituric acid derivative crystals

“…Within a very short duration, the enormous strain energy does not get channelized, thereby manifested by breaking into fragments. After breaking, 30 individual fragments can jump off 28,46 the surface and can reach a few distances away (∼0.1-2 cm) (Fig. S6, ESI †).…”

Isotropic pressure promoted collective self-healing response in granular molecular crystals

“…In 2016, Naumov et al [7] reported the first self-healing behavior in dipyrazolethiuram disulfide molecular crystals and extended the self-healing concept to ordered molecular crystals. Thus far, only a few self-healing molecular crystals have been reported [7][8][9][10][11][12]. Additionally, molecular materials show limited self-healing efficiency.…”

Relating Excited States to the Dynamics of Macroscopic Strain in Photoresponsive Crystals

“…Attention to mechanically responsive materials that are capable of converting energy into work is easy to justify. They are interesting for numerous applications, such as sensors, actuators, and supramolecular machines and devices. − In recent years, extensive studies in this field have been documented and summarized in both original papers and monographs. ,− , In particular, the effects of crystal geometry, mechanical properties, and absorption coefficients, as well as of polarization, intensity, wavelength, and direction of irradiation, have been reported. − …”

“…We have observed evidence of the indirect effect for this system, wherein the thickness of the crystal significantly impacted the reaction by modifying the spatial inhomogeneity of the product. , We wanted to see if we can also reveal the existence of the “direct effect” and use this new knowledge to shed light on the nature of the excited state and the mechanism of the nitro–nitrito isomerization. We have shown in our previous work that precise measurements of crystal bending and/or elongation on irradiation enable one to quantitatively determine quantum yields and kinetic constants of elementary steps of photochemical reactions, as well the light absorption coefficients for the reactants and the products, and the information on feedback effects. ,,,, …”

“…51−62 In recent years, extensive studies in this field have been documented and summarized in both original papers and monographs. 12,[51][52][53][54][55][56][57][58]63 In particular, the effects of crystal geometry, mechanical properties, and absorption coefficients, as well as of polarization, intensity, wavelength, and direction of irradiation, have been reported. 64−70 The effect of the wavelength of light is of special interest in this context.…”