0000000001303484

AUTHOR

Jaana Vapaavuori

showing 5 related works from this author

Supramolecular hierarchy among halogen and hydrogen bond donors in light-induced surface patterning

2015

Halogen bonding, a noncovalent interaction possessing several unique features compared to the more familiar hydrogen bonding, is emerging as a powerful tool in functional materials design. Herein, we unambiguously show that one of these characteristic features, namely high directionality, renders halogen bonding the interaction of choice when developing azobenzene-containing supramolecular polymers for light-induced surface patterning. The study is conducted by using an extensive library of azobenzene molecules that differ only in terms of the bond-donor unit. We introduce a new tetrafluorophenol-containing azobenzene photoswitch capable of forming strong hydrogen bonds, and show that an io…

RELIEF GRATINGSDENSITY-FUNCTIONAL THEORY CALCULATIONSMaterials sciencePHOTOINDUCED BIREFRINGENCE116 Chemical sciencesta221Supramolecular chemistryPhotochemistrysupramolecular chemistryDENSITY-FUNCTIONAL THEORYchemistry.chemical_compoundMaterials ChemistryMoleculeTHERMAL-ISOMERIZATIONPOLARIZATION DEPENDENCECO-CRYSTALSLIQUID-CRYSTAL ORDERta218chemistry.chemical_classificationta214Halogen bondta114PhotoswitchHydrogen bondPolymers Halogen Bonding Supramolecular Chemistry Photoresponsive AzobenzeneGeneral Chemistryhydrogen bondingPOLYMER-AZOBENZENE COMPLEXESSupramolecular polymersSOLID-STATEchemistryAzobenzeneHALOGEN BONDINGHalogenlight-induced surface patterningSettore CHIM/07 - Fondamenti Chimici Delle TecnologiePHOTONIC APPLICATIONSPOLYMER-AZOBENZENE COMPLEXES; DENSITY-FUNCTIONAL THEORY; LIQUID-CRYSTAL ORDER; RELIEF GRATINGS; SOLID-STATE; PHOTOINDUCED BIREFRINGENCE; POLARIZATION DEPENDENCE; THERMAL-ISOMERIZATION; PHOTONIC APPLICATIONS; CO-CRYSTALSJournal of Materials Chemistry C
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Supramolecular control of liquid crystals by doping with halogen-bonding dyes

2017

Introducing photochromic or polymeric dopants into nematic liquid crystals is a well-established method to create stimuli-responsive photonic materials with the ability to "control light with light". Herein, we demonstrate a new material design concept by showing that specific supramolecular interactions between the host liquid crystal and the guest dopants enhance the optical performance of the doped liquid crystals. By varying the type and strength of the dopant-host interaction, the phase-transition temperature, the order parameter of the guest molecules, and the diffraction signal in response to interference irradiation, can be accurately engineered. Our concept points out the potential…

Materials scienceGeneral Chemical EngineeringHalogen Bonding Polymers Liquid Crystals Photoresponsive Materials Supramolecular Chemistry116 Chemical sciencesSupramolecular chemistryphotonicsPhysics::OpticsNanotechnology02 engineering and technology010402 general chemistry01 natural sciencesPhotonic metamaterialPhotochromismliquid crystalsLiquid crystalCondensed Matter::Superconductivitydye-doped liquid crystalsta116ta215Halogen bondDopantbusiness.industryDopingGeneral Chemistry021001 nanoscience & nanotechnologysupramolecular interactions0104 chemical sciencesCondensed Matter::Soft Condensed Matterhalogen bondingOptoelectronicsSettore CHIM/07 - Fondamenti Chimici Delle TecnologiePhotonics0210 nano-technologybusinessRSC Advances
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CCDC 1535157: Experimental Crystal Structure Determination

2017

Related Article: Jaana Vapaavuori, Antti Siiskonen, Valentina Dichiarante, Alessandra Forni, Marco Saccone, Tullio Pilati, Christian Pellerin, Atsushi Shishido, Pierangelo Metrangolo, Arri Priimagi|2017|RSC Advances|7|40237|doi:10.1039/C7RA06397K

Space GroupCrystallographyCrystal System4'-pentyl[11'-biphenyl]-4-carbonitrile NN-dimethyl-4-[(2356-tetrafluoro-4-iodophenyl)diazenyl]anilineCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1025655: Experimental Crystal Structure Determination

2014

Related Article: Marco Saccone, Valentina Dichiarante, Alessandra Forni, Alexis Goulet-Hanssens, Gabriella Cavallo, Jaana Vapaavuori, Giancarlo Terraneo, Christopher J. Barrett, Giuseppe Resnati, Pierangelo Metrangolo, Arri Priimagi|2015|J.Mater.Chem.C|3|759|doi:10.1039/C4TC02315C

Space GroupCrystallographybis(4-((4-(dimethylamino)phenyl)diazenyl)-2356-tetrafluorophenol) 44'-ethene-12-diyldipyridineCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1025656: Experimental Crystal Structure Determination

2014

Related Article: Marco Saccone, Valentina Dichiarante, Alessandra Forni, Alexis Goulet-Hanssens, Gabriella Cavallo, Jaana Vapaavuori, Giancarlo Terraneo, Christopher J. Barrett, Giuseppe Resnati, Pierangelo Metrangolo, Arri Priimagi|2015|J.Mater.Chem.C|3|759|doi:10.1039/C4TC02315C

Space GroupCrystallographyCrystal SystemCrystal StructureCell Parametersbis(4-((4-(iodoethynyl)phenyl)diazenyl)-NN-dimethylaniline) 44'-ethene-12-diyldipyridineExperimental 3D Coordinates
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