Thermally Twistable, Photobendable, Elastically Deformable, and Self-Healable Soft Crystals

Poonam Gupta; Durga Prasad Karothu; Ejaz Ahmed; Panče Naumov; Naba K. Nath

doi:10.1002/anie.201802785

Thermally Twistable, Photobendable, Elastically Deformable, and Self-Healable Soft Crystals

Poonam Gupta, Durga Prasad Karothu, Ejaz Ahmed, Panče Naumov, Naba K. Nath

Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

The first example of a smart crystalline material, the 2:1 cocrystal of probenecid and 4,4′-azopyridine, which responds reversibly to multiple external stimuli (heat, UV light, and mechanical pressure) by twisting, bending, and elastic deformation without fracture is reported. This material is also able to self-heal on heating and cooling, thereby overcoming the main setbacks of molecular crystals for future applications as crystal actuators. The photo- and thermomechanical effects and self-healing capabilities of the material are rooted in reversible trans–cis isomerization of the azopyridine unit and crystal-to-crystal phase transition. Fairly isotropic intermolecular interactions and interlocked crisscrossed molecular packing secure high elasticity of the crystals.

Original language	English (US)
Pages (from-to)	8498-8502
Number of pages	5
Journal	Angewandte Chemie - International Edition
Volume	57
Issue number	28
DOIs	https://doi.org/10.1002/anie.201802785
State	Published - Jul 9 2018

Keywords

actuators
azobenzene
photomechanical effects
self-healing
single crystals

ASJC Scopus subject areas

Catalysis
General Chemistry

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10.1002/anie.201802785

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title = "Thermally Twistable, Photobendable, Elastically Deformable, and Self-Healable Soft Crystals",

abstract = "The first example of a smart crystalline material, the 2:1 cocrystal of probenecid and 4,4′-azopyridine, which responds reversibly to multiple external stimuli (heat, UV light, and mechanical pressure) by twisting, bending, and elastic deformation without fracture is reported. This material is also able to self-heal on heating and cooling, thereby overcoming the main setbacks of molecular crystals for future applications as crystal actuators. The photo- and thermomechanical effects and self-healing capabilities of the material are rooted in reversible trans–cis isomerization of the azopyridine unit and crystal-to-crystal phase transition. Fairly isotropic intermolecular interactions and interlocked crisscrossed molecular packing secure high elasticity of the crystals.",

keywords = "actuators, azobenzene, photomechanical effects, self-healing, single crystals",

author = "Poonam Gupta and Karothu, {Durga Prasad} and Ejaz Ahmed and Pan{\v c}e Naumov and Nath, {Naba K.}",

note = "Funding Information: We thank NIT Meghalaya for a fellowship (to P.G.) and for a startup grant (N.K.N). This work was financially supported by DST SERB ECR Grant (ECR/2016/000331). We thank Dr. Liang Li (NYUAD) for his support with the DSC experiments. We thank NIT Meghalaya for the instrumental facilities. This research was partially carried out using Core Technology Platform (CTP) resources at New York University Abu Dhabi. Publisher Copyright: {\textcopyright} 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim",

year = "2018",

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doi = "10.1002/anie.201802785",

language = "English (US)",

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AU - Ahmed, Ejaz

AU - Naumov, Panče

AU - Nath, Naba K.

N1 - Funding Information: We thank NIT Meghalaya for a fellowship (to P.G.) and for a startup grant (N.K.N). This work was financially supported by DST SERB ECR Grant (ECR/2016/000331). We thank Dr. Liang Li (NYUAD) for his support with the DSC experiments. We thank NIT Meghalaya for the instrumental facilities. This research was partially carried out using Core Technology Platform (CTP) resources at New York University Abu Dhabi. Publisher Copyright: © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

PY - 2018/7/9

Y1 - 2018/7/9

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AB - The first example of a smart crystalline material, the 2:1 cocrystal of probenecid and 4,4′-azopyridine, which responds reversibly to multiple external stimuli (heat, UV light, and mechanical pressure) by twisting, bending, and elastic deformation without fracture is reported. This material is also able to self-heal on heating and cooling, thereby overcoming the main setbacks of molecular crystals for future applications as crystal actuators. The photo- and thermomechanical effects and self-healing capabilities of the material are rooted in reversible trans–cis isomerization of the azopyridine unit and crystal-to-crystal phase transition. Fairly isotropic intermolecular interactions and interlocked crisscrossed molecular packing secure high elasticity of the crystals.

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KW - photomechanical effects

KW - self-healing

KW - single crystals

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Thermally Twistable, Photobendable, Elastically Deformable, and Self-Healable Soft Crystals

Abstract

Keywords

ASJC Scopus subject areas

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