0000000001304994

AUTHOR

Sami Hietala

showing 11 related works from this author

Rapid self-healing and anion selectivity in metallosupramolecular gels assisted by fluorine-fluorine interactions.

2017

Simple ML2 [M = Fe(II), Co(II), Ni(II)] complexes obtained from a perfluoroalkylamide derivative of 4-aminophenyl-2,2′,6,2′-terpyridine spontaneously, yet anion selectively, self-assemble into gels, which manifest an unprecedented rapid gel strength recovery, viz. self-healing, and thermal rearrangement in aqueous dimethyl sulfoxide. The key factor for gelation and rheological properties emerges from the fluorine–fluorine interactions between the perfluorinated chains, as the corresponding hydrocarbon derivative did not form metallogels. The perfluoro-terpyridine ligand alone formed single crystals, while its Fe(II), Co(II) or Ni(II) complexes underwent rapid gelation leading to highly enta…

kemiachemistry.chemical_element02 engineering and technology010402 general chemistrychemistry01 natural sciencesMetalInorganic Chemistrychemistry.chemical_compoundTheoretical and Computational ChemistryfluorinePolymer chemistryOrganic chemistryThermal stabilitymoleculeshydrocarbonsta116chemistry.chemical_classificationgeelitAqueous solutionta114Ligandmolekyylit021001 nanoscience & nanotechnologygelsfluorihiilivedyt0104 chemical sciencesHydrocarbonchemistryvisual_artFluorinevisual_art.visual_art_mediumInorganic & Nuclear Chemistry0210 nano-technologySelectivityOther Chemical SciencesDerivative (chemistry)
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Bipyridine based metallogels: an unprecedented difference in photochemical and chemical reduction in the in situ nanoparticle formation

2017

Metal co-ordination induced supramolecular gelation of low molecular weight organic ligands is a rapidly expanding area of research due to the potential in creating hierarchically self-assembled multi-stimuli responsive materials. In this context, structurally simple O-methylpyridine derivatives of 4,4′-dihydroxy-2,2′-bipyridine ligands are reported. Upon complexation with Ag(I) ions in aqueous dimethyl sulfoxide (DMSO) solutions the ligands spontaneously form metallosupramolecular gels at concentrations as low as 0.6 w/v%. The metal ions induce the self-assembly of three dimensional (3D) fibrillar networks followed by the spontaneous in situ reduction of the Ag-centers to silver nanopartic…

Metal ions in aqueous solutionta221Supramolecular chemistryNanoparticleContext (language use)02 engineering and technology010402 general chemistryPhotochemistry01 natural sciencesSilver nanoparticleInorganic ChemistryBipyridinechemistry.chemical_compoundmetallogelsta116Aqueous solutionligandsLigandChemistryliganditsupramolecular gelation021001 nanoscience & nanotechnology0104 chemical sciencesChemistrynanoparticlesnanohiukkaset0210 nano-technologyDalton Transactions
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Subcomponent Self-Assembly A Quick Way to New Metallogels

2013

Subcomponent self-assembly, introduced by the Nitschke group,[1] is a process which allow complex structures to be generated from simple building blocks (generally aldehydes and amines). In this bottom-up approach, the building blocks spontaneously self-assemble around templates (usually metal ions) leading to a simultaneous covalent (C=N) and dative (N– metal) bonds formation. The method has been successfully used to construct well-defined metal-organic macrocycles, helicates, catenanes, rotaxanes, grids,[2] and cages.[3] Our field of interest lies not in building-up of defined structures but in designing gelator molecules for a formation of supramolecular gels as functional nanomaterials.…

SUPRAMOLECULAR GELSMetal ions in aqueous solutionta221GELATORSSupramolecular chemistryNanoparticleNanotechnologymetallogeelimultistimuli responsive010402 general chemistrySmart material01 natural sciencesCatalysisMOLECULESMoleculeta116ta218ta214ta114010405 organic chemistryChemistryIN-SITUOrganic ChemistryGeneral Chemistryself-assemblygelsGELATION0104 chemical sciencesin situ gelationMETALnanoparticlesSelf-assemblymetallogelCHEMISTRY: A EUROPEAN JOURNAL
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CCDC 1500638: Experimental Crystal Structure Determination

2017

Related Article: Rajendhraprasad Tatikonda, Kia Bertula, Nonappa, Sami Hietala, Kari Rissanen, Matti Haukka|2017|Dalton Trans.|46|2793|doi:10.1039/C6DT04253H

Space GroupCrystallography44'-bis(pyridin-3-ylmethoxy)-22'-bipyridineCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1533110: Experimental Crystal Structure Determination

2017

Related Article: Leticia Arnedo-Sánchez, Nonappa, Sandip Bhowmik, Sami Hietala, Rakesh Puttreddy, Manu Lahtinen, Luisa De Cola, Kari Rissanen|2017|Dalton Trans.|46|7309|doi:10.1039/C7DT00983F

Space GroupCrystallographyCrystal SystemCrystal StructureCell Parameters223344556677888-pentadecafluoro-N-[4-([1222:2632-terpyridin]-24-yl)phenyl]octanamideExperimental 3D Coordinates
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CCDC 1533112: Experimental Crystal Structure Determination

2017

Related Article: Leticia Arnedo-Sánchez, Nonappa, Sandip Bhowmik, Sami Hietala, Rakesh Puttreddy, Manu Lahtinen, Luisa De Cola, Kari Rissanen|2017|Dalton Trans.|46|7309|doi:10.1039/C7DT00983F

Space GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates223344556677888-pentadecafluoro-N-[4-([1222:2632-terpyridin]-24-yl)phenyl]octanamide tetrahydrofuran solvate
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CCDC 1500637: Experimental Crystal Structure Determination

2017

Related Article: Rajendhraprasad Tatikonda, Kia Bertula, Nonappa, Sami Hietala, Kari Rissanen, Matti Haukka|2017|Dalton Trans.|46|2793|doi:10.1039/C6DT04253H

Space GroupCrystallographyCrystal SystemCrystal StructureCell Parameters44'-bis(pyridin-2-ylmethoxy)-22'-bipyridineExperimental 3D Coordinates
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CCDC 1533113: Experimental Crystal Structure Determination

2017

Related Article: Leticia Arnedo-Sánchez, Nonappa, Sandip Bhowmik, Sami Hietala, Rakesh Puttreddy, Manu Lahtinen, Luisa De Cola, Kari Rissanen|2017|Dalton Trans.|46|7309|doi:10.1039/C7DT00983F

Space GroupCrystallography223344556677888-pentadecafluoro-N-[4-([1222:2632-terpyridin]-24-yl)phenyl]octanamide chloroform solvateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1500639: Experimental Crystal Structure Determination

2017

Related Article: Rajendhraprasad Tatikonda, Kia Bertula, Nonappa, Sami Hietala, Kari Rissanen, Matti Haukka|2017|Dalton Trans.|46|2793|doi:10.1039/C6DT04253H

44'-bis(pyridin-4-ylmethoxy)-22'-bipyridineSpace GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1533111: Experimental Crystal Structure Determination

2017

Related Article: Leticia Arnedo-Sánchez, Nonappa, Sandip Bhowmik, Sami Hietala, Rakesh Puttreddy, Manu Lahtinen, Luisa De Cola, Kari Rissanen|2017|Dalton Trans.|46|7309|doi:10.1039/C7DT00983F

Space GroupCrystallographyCrystal SystemCrystal StructureCell Parametersbis{4455667788991010111111-heptadecafluoro-N-[4-([1222:2632-terpyridin]-24-yl)phenyl]undecanamide}-nickel(ii) dichloride dimethyl sulfoxide solvate monohydrateExperimental 3D Coordinates
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CCDC 1533114: Experimental Crystal Structure Determination

2017

Related Article: Leticia Arnedo-Sánchez, Nonappa, Sandip Bhowmik, Sami Hietala, Rakesh Puttreddy, Manu Lahtinen, Luisa De Cola, Kari Rissanen|2017|Dalton Trans.|46|7309|doi:10.1039/C7DT00983F

Space GroupCrystallography223344556677888-pentadecafluoro-N-[4-([1222:2632-terpyridin]-24-yl)phenyl]octanamide methanol solvate monohydrateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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