Quantification of Photoinduced Bending of Dynamic Molecular Crystals: From Macroscopic Strain to Kinetic Constants and Activation Energies | Sciact - CRIS-система Института катализа

Quantification of Photoinduced Bending of Dynamic Molecular Crystals: From Macroscopic Strain to Kinetic Constants and Activation Energies Научная публикация

Журнал

Chemical Science
ISSN: 2041-6520 , E-ISSN: 2041-6539

Вых. Данные

Год: 2018, Том: 9, Номер: 8, Страницы: 2319-2335 Страниц : 17 DOI: 10.1039/c7sc04863g

Ключевые слова

Activation energy; Actuators; Crystal structure; Kinematics; Kinetics; Liquid crystals; Mathematical transformations; Mechanical actuators; Molecular crystals; Photochemical reactions; Rate constants; Temperature distribution

Авторы

Chizhik Stanislav ^1,2 , Sidelnikov Anatoly ^1,2 , Zakharov Boris ^1,2 , Naumov Pance ³ , Boldyreva Elena ^1,2

Организации

1	Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of Russian Academy of Sciences, ul. Kutateladze, 18, Novosibirsk 620128, Russian Federation
2	Novosibirsk State University, ul. Pirogova, 2, Novosibirsk 630090, Russian Federation
3	New York University Abu Dhabi, P.O. Box 129188, Abu Dhabi, United Arab Emirates

Информация о финансировании (3)

1	Федеральное агентство научных организаций России	0301-2016-0014 (АААА-А17-117030310274-5)
2	Федеральное агентство научных организаций России	0301-2016-0020
3	New York University Abu Dhabi

Photomechanically reconfigurable elastic single crystals are the key elements for contactless, timely controllable and spatially resolved transduction of light into work from the nanoscale to the macroscale. The deformation in such single-crystal actuators is observed and usually attributed to anisotropy in their structure induced by the external stimulus. Yet, the actual intrinsic and external factors that affect the mechanical response remain poorly understood, and the lack of rigorous models stands as the main impediment towards benchmarking of these materials against each other and with much better developed soft actuators based on polymers, liquid crystals and elastomers. Here, experimental approaches for precise measurement of macroscopic strain in a single crystal bent by means of a solid-state transformation induced by light are developed and used to extract the related temperature-dependent kinetic parameters. The experimental results are compared against an overarching mathematical model based on the combined consideration of light transport, chemical transformation and elastic deformation that does not require fitting of any empirical information. It is demonstrated that for a thermally reversible photoreactive bending crystal, the kinetic constants of the forward (photochemical) reaction and the reverse (thermal) reaction, as well as their temperature dependence, can be extracted with high accuracy. The improved kinematic model of crystal bending takes into account the feedback effect, which is often neglected but becomes increasingly important at the late stages of the photochemical reaction in a single crystal. The results provide the most rigorous and exact mathematical description of photoinduced bending of a single crystal to date.

Chizhik S. , Sidelnikov A. , Zakharov B. , Naumov P. , Boldyreva E.
Quantification of Photoinduced Bending of Dynamic Molecular Crystals: From Macroscopic Strain to Kinetic Constants and Activation Energies

Chemical Science. 2018. V.9. N8. P.2319-2335. DOI: 10.1039/c7sc04863g WOS Scopus РИНЦ CAPlus OpenAlex

Полный текст от издателя

Поступила в редакцию:	11 нояб. 2017 г.
Принята к публикации:	19 янв. 2018 г.
Опубликована online:	22 янв. 2018 г.

Web of science:	WOS:000427091500029
Scopus:	2-s2.0-85042598867
РИНЦ:	35506169
Chemical Abstracts:	2018:139732
OpenAlex:	W2784407351

БД	Цитирований
Web of science	81
Scopus	82
OpenAlex	79