Quantification of photoinduced bending of dynamic molecular crystals: from macroscopic strain to kinetic constants and activation energies

Чижик, С.А.; Sidelnikov, A.A.; Zakharov, Boris A.; Naumov, Panče; Boldyreva, Elena V.

doi:10.1039/c7sc04863g

Cited by 77 publications

(135 citation statements)

References 74 publications

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“…The sample temperature was elevated from room temperature to 150°C at the rate of 5°C min À 1 . Solid-state CPMAS 13 C NMR spectra were measured on a Jeol JNM-ECA400 spectrometer at the measurement frequency of 100.5 MHz and the rotation frequency of 15 kHz. 13 C NMR chemical shifts are referenced to the methyl signal (δ = 17.36 ppm) of hexamethylbenzene, which was used as the external standard.…”

Section: Experimental Section Generalmentioning

confidence: 99%

“…Solid-state CPMAS 13 C NMR spectra were measured on a Jeol JNM-ECA400 spectrometer at the measurement frequency of 100.5 MHz and the rotation frequency of 15 kHz. 13 C NMR chemical shifts are referenced to the methyl signal (δ = 17.36 ppm) of hexamethylbenzene, which was used as the external standard. Photo-irradiation was carried out with an ultrahigh-pressure mercury lamp (Ushio Optical Modulex, SX-UI501HQ) using a cold filter (Asahi Spectra, SC1201) and a band-pass filter (λ max = 370 nm).…”

Section: Experimental Section Generalmentioning

confidence: 99%

“…We thank Keiko Ideta and Taisuke Matsumoto (Institute for Materials Chemistry and Engineering, IMCE) for CPMAS 13 C NMR and X-ray diffraction measurements, respectively. This work was partially supported by a Grant-in-Aid for Scientific Research (JP16 K05699) from the Ministry of Education, Culture, Sports, Science and Technology, Japan and by funding from IMCE and Integrated Research Consortium on Chemical Sciences (IRCCS).…”

Section: Acknowledgementsmentioning

confidence: 99%

“…Naumov and co‐workers treated a mechanical profile of a crystal with chemical reaction kinetics as a time‐dependent mathematical model . Later, the quantification of mechanical bending was achieved with an improved kinetic model …”

Section: Introductionmentioning

confidence: 99%

“…[12] Later, the quantification of mechanical bending was achieved with an improved kinetic model. [13] We have previously reported photomechanical crystals composed of naphthalene diimide molecules having dialkylamino groups on the side chain. [14] Parent molecule 1 is shown in Figure 1a.…”

Section: Introductionmentioning

confidence: 99%

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Switching Photomechanical Response by a Structural Phase Transition in a Naphthalene Diimide Derivative

et al. 2020

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A newly prepared photoresponsive material, specifically a naphthalene diimide molecule containing alkylamino groups, was found to exhibit a structural phase transition in the crystalline state. The phase transition dramatically altered the molecular arrangement from orthogonal π‐π stacking to parallel π‐π stacking. The photomechanical response of each crystal was also changed before and after the phase transition. While the as‐prepared crystal immediately responded to light irradiation (λ=370 nm), the responsiveness of the crystal became slower after heat treatment. Upon light irradiation, radical species, such as the radical anion, radical anion dimer, and mixed valence species, were formed, which have nearly the same distribution in both phases. However, the spin system and the structure of the radical anion were quite different from each other and were found to be sensitive to the molecular arrangement. The photo‐responsiveness of the crystals was corroborated by evaluating the relaxation of the radical anion.

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Section: Experimental Section Generalmentioning

confidence: 99%

Section: Experimental Section Generalmentioning

confidence: 99%

Section: Acknowledgementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Switching Photomechanical Response by a Structural Phase Transition in a Naphthalene Diimide Derivative

et al. 2020

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Bending, Jumping, and Self‐Healing Crystals

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Mechanically Responsive Materials for Soft Robotics

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Micromanipulation of Mechanically Compliant Organic Single‐Crystal Optical Microwaveguides

et al. 2020

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Flexible organic single crystals are evolving as new materials for optical waveguides that can be used for transfer of information in organic optoelectronic microcircuits.I ntegration in microelectronics of such crystalline waveguides requires downsizing and precise spatial control over their shape and sizea tt he microscale,h owever that currently is not possible due to difficulties with manipulation of these small, brittle objects that are prone to cracking and disintegration. Here we demonstrate that atomic force microscopy(AFM) can be used to reshape,r esizea nd relocate single-crystal microwaveguides in order to attain spatial control over their light output. Using an AFM cantilever tip,m echanically compliant acicular microcrystals of three N-benzylideneanilines were bent to an arbitrary angle,s liced out from ab undle into individual crystals,cut into shorter crystals of arbitrary length, and moved across and aboveasolid surface.W hen excited by using laser light, such bent microcrystals act as active optical microwaveguides that transduce their fluorescence,w ith the total intensity of transduced light being dependent on the optical path length. This micromanipulation of the crystal waveguides using AFM is non-invasive,a nd after bending their emissive spectral output remains unaltered. The approach reported here effectively overcomes the difficulties that are commonly encountered with reshaping and positioning of small delicate objects (the "thick fingers" problem), and can be applied to mechanically reconfigure organic optical waveguides in order to attain spatial control over their output in two and three dimensions in optical microcircuits.

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Quantification of photoinduced bending of dynamic molecular crystals: from macroscopic strain to kinetic constants and activation energies

Abstract: Precise measurement of bending kinematics induced by a photochemical reaction in a single crystal can be used to extract the kinetic parameters of the underlying reaction with high accuracy.

Cited by 77 publications

References 74 publications

Switching Photomechanical Response by a Structural Phase Transition in a Naphthalene Diimide Derivative

Switching Photomechanical Response by a Structural Phase Transition in a Naphthalene Diimide Derivative

Bending, Jumping, and Self‐Healing Crystals

Micromanipulation of Mechanically Compliant Organic Single‐Crystal Optical Microwaveguides

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