Mechanically Responsive Crystals: Analysis of Macroscopic Strain Reveals “Hidden” Processes Full article
| Journal |
The Journal of Physical Chemistry A
ISSN: 1089-5639 , E-ISSN: 1520-5215 |
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| Output data | Year: 2020, Volume: 124, Number: 2, Pages: 300-310 Pages count : 11 DOI: 10.1021/acs.jpca.9b10365 | ||||||||
| Tags | DYNAMIC MOLECULAR-CRYSTALS; PHASE-TRANSITION; BEHAVIOR; MOTION | ||||||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Ministry of Science and Higher Education of the Russian Federation | 0239-2019-0003 |
| 2 | New York University Abu Dhabi |
Abstract:
Mechanical response of single crystals to light, temperature and/or force—an emerging platform for the development of new organic actuating materials for soft robotics—has recently been quantitatively described by a general and robust mathematical model (Chem. Rev. 2015, 115, 12440–12490). The model can be used to extract accurate activation energies and kinetics of solid-state chemical reactions simply by tracking the time-dependent bending of the crystal. Here we illustrate that deviations of the macroscopic strain in the crystal from that predicted by the model reveals existence of additional, "hidden" chemical or physical processes, such as sustained structural relaxation between the chemical transformation and the resulting macroscopic deformation of the crystal. This is illustrated with photobendable single crystals of 4-hydroxy-2-(2-pyridinylmethylene)hydrazide, a photochemical switch that undergoes E-to-Z isomerization. An irreversible chemical side reaction in these crystals results in plastic relaxation and partial amorphization that are observed as poor correlation between the transformation extent and the induced strains. The occurrence of these processes was independently confirmed by X-ray diffraction and differential scanning calorimetry. An extended mathematical model is proposed to account for this complex mechanical response.
Cite:
Desta I.T.
, Chizhik S.A.
, Sidelnikov A.A.
, Karothu D.P.
, Boldyreva E.V.
, Naumov P.
Mechanically Responsive Crystals: Analysis of Macroscopic Strain Reveals “Hidden” Processes
The Journal of Physical Chemistry A. 2020. V.124. N2. P.300-310. DOI: 10.1021/acs.jpca.9b10365 WOS Scopus РИНЦ AN PMID OpenAlex
Mechanically Responsive Crystals: Analysis of Macroscopic Strain Reveals “Hidden” Processes
The Journal of Physical Chemistry A. 2020. V.124. N2. P.300-310. DOI: 10.1021/acs.jpca.9b10365 WOS Scopus РИНЦ AN PMID OpenAlex
Dates:
| Submitted: | Nov 4, 2019 |
| Accepted: | Dec 10, 2019 |
| Published online: | Dec 10, 2019 |
| Published print: | Jan 16, 2020 |
Identifiers:
| Web of science: | WOS:000508468500006 |
| Scopus: | 2-s2.0-85077945015 |
| Elibrary: | 43226765 |
| Chemical Abstracts: | 2019:2372610 |
| PMID: | 31821761 |
| OpenAlex: | W2995952622 |