Fabrication of Photoactuators: Macroscopic Photomechanical Responses of Metal–Organic Frameworks to Irradiation by UV Light

Photoreactive olefinic species are incorporated into a metal–organic framework (MOF), [Zn(bdc)(3‐F‐spy)] (1). Single crystals of 1 are shown to undergo three types of photomechanical macroscopic deformation upon illumination by UV light. To demonstrate the practical potential of this system, the inc...

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Bibliographic Details
Published in:Angewandte Chemie 2019-07, Vol.131 (28), p.9553-9558
Main Authors: Shi, Yi‐Xiang, Zhang, Wen‐Hua, Abrahams, Brendan F., Braunstein, Pierre, Lang, Jian‐Ping
Format: Article
Language:English
Subjects:
Actuation
Alcohols
Chemistry
Crystals
Deformation
Energy harvesting
Fabrication
Gitterkontraktion
Irradiation
Light
Metal-organic frameworks
Metall-organische Gerüste
Metals
Photoaktuatoren
Photomechanische Deformation
Polyvinyl alcohol
Single crystals
Stimuliresponsive Materialien
Ultraviolet radiation
Zinc
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Summary:Photoreactive olefinic species are incorporated into a metal–organic framework (MOF), [Zn(bdc)(3‐F‐spy)] (1). Single crystals of 1 are shown to undergo three types of photomechanical macroscopic deformation upon illumination by UV light. To demonstrate the practical potential of this system, the inclusion of 1 in a PVA (polyvinyl alcohol) composite membrane, by exploiting hydrogen‐bonding interactions, is presented. Using this composite membrane, the amplification of mechanical stress to achieve macroscopic actuation behavior is demonstrated. These results pave the way for the generation of MOF‐based soft photoactuators that produce clearly defined mechanical responses upon irradiation with light. Such systems are anticipated to have considerable potential in photomechanical energy harvesting and conversion systems. Photomechanische Deformation: Eine Selbstorganisationsstrategie liefert ein hierarchisches Photoaktuatorsystem, in dem eine photoresponsive Einheit in einen MOF‐Kristall eingebaut ist. Das System besteht aus einer MOF‐PVA‐Kompositmembran und zeigt eine makroskopische Antwort auf UV‐Bestrahlung. MOF=Metall‐organisches Gerüst, PVA=Polyvinylalkohol.
ISSN:0044-8249
1521-3757
DOI:10.1002/ange.201903757