Efficient light-induced phase transitions in halogen-bonded liquid crystals

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Fernandez-Palacio, Francisco
dc.contributor.author Poutanen, Mikko
dc.contributor.author Saccone, Marco
dc.contributor.author Siiskonen, Antti
dc.contributor.author Terraneo, Giancarlo
dc.contributor.author Resnati, Giuseppe
dc.contributor.author Ikkala, Olli
dc.contributor.author Metrangolo, Pierangelo
dc.contributor.author Priimägi, Arri
dc.date.accessioned 2016-12-16T14:10:04Z
dc.date.issued 2016-11-22
dc.identifier.citation Fernandez-Palacio , F , Poutanen , M , Saccone , M , Siiskonen , A , Terraneo , G , Resnati , G , Ikkala , O , Priimagi , A & Metrangolo , P 2016 , ' Efficient light-induced phase transitions in halogen-bonded liquid crystals ' Chemistry of Materials , vol 28 , no. 22 , pp. 8314-8321 . DOI: 10.1021/acs.chemmater.6b03460 en
dc.identifier.issn 0897-4756
dc.identifier.issn 1520-5002
dc.identifier.other PURE UUID: 5fcec9c0-03f1-467c-936d-ccc8de16e46d
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/efficient-lightinduced-phase-transitions-in-halogenbonded-liquid-crystals(5fcec9c0-03f1-467c-936d-ccc8de16e46d).html
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=84997824561&partnerID=8YFLogxK
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/9602484/acs.chemmater.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/23794
dc.description.abstract Here, we present a new family of light-responsive, fluorinated supramolecular liquid crystals (LCs) showing efficient and reversible light-induced LC-to-isotropic phase transitions. Our materials design is based on fluorinated azobenzenes, where the fluorination serves to strengthen the noncovalent interaction with bond-accepting stilbazole molecules, and increase the lifetime of the cis-form of the azobenzene units. The halogen-bonded LCs were characterized by means of X-ray diffraction, hot-stage polarized optical microscopy, and differential scanning calorimetry. Simultaneous analysis of light-induced changes in birefringence, absorption, and optical scattering allowed us to estimate that <4% of the mesogenic units in the cis-form suffices to trigger the full LC-to-isotropic phase transition. We also report a light-induced and reversible crystal-to-isotropic phase transition, which has not been previously observed in supramolecular complexes. In addition to fundamental understanding of light-responsive supramolecular complexes, we foresee this study to be important in the development of bistable photonic devices and supramolecular actuators. en
dc.format.extent 8
dc.format.extent 8314-8321
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries Chemistry of Materials en
dc.relation.ispartofseries Volume 28, issue 22 en
dc.rights openAccess en
dc.subject.other Chemistry(all) en
dc.subject.other Chemical Engineering(all) en
dc.subject.other Materials Chemistry en
dc.subject.other 114 Physical sciences en
dc.title Efficient light-induced phase transitions in halogen-bonded liquid crystals en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Polytechnic University of Milan
dc.contributor.department Department of Applied Physics
dc.contributor.department Tampere University of Technology
dc.subject.keyword Chemistry(all)
dc.subject.keyword Chemical Engineering(all)
dc.subject.keyword Materials Chemistry
dc.subject.keyword 114 Physical sciences
dc.identifier.urn URN:NBN:fi:aalto-201612165971
dc.identifier.doi 10.1021/acs.chemmater.6b03460
dc.type.version publishedVersion

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