0000000001301459

AUTHOR

Felix Witte

showing 6 related works from this author

An aryl-fused redox-active tetrathiafulvalene with enhanced mixed-valence and radical-cation dimer stabilities.

2018

Molecular recognition of stable organic radicals is a relatively novel, but important structural binding motif in supramolecular chemistry. Here, we report on a redox-switchable veratrole-fused tetrathiafulvalene derivative VTTF which is ideally suited for this purpose and for the incorporation into stimuli-responsive systems. As revealed by electrochemistry, UV/Vis measurements, X-ray analysis, and electrocrystallisation, VTTF can be reversibly oxidised to the corresponding radical-cation or dication which shows optoelectronic and structural propterties similar to tetrathiafulvalene and tetrakis(methylthio)tetrathiafulvalene. However, theoretical calculations, variable temperature EPR, and…

010405 organic chemistryChemistryArylDimerRadicalOrganic ChemistrySupramolecular chemistry010402 general chemistry01 natural sciencesBiochemistrysupramolecular chemistry0104 chemical scienceslaw.inventionDicationchemistry.chemical_compoundCrystallographyRadical ionlawsupramolekulaarinen kemiaPhysical and Theoretical ChemistryElectron paramagnetic resonanceta116TetrathiafulvaleneOrganicbiomolecular chemistry
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Thermodynamic and electrochemical study of tailor-made crown ethers for redox-switchable (pseudo)rotaxanes

2020

Crown ethers are common building blocks in supramolecular chemistry and are frequently applied as cation sensors or as subunits in synthetic molecular machines. Developing switchable and specifically designed crown ethers enables the implementation of function into molecular assemblies. Seven tailor-made redox-active crown ethers incorporating tetrathiafulvalene (TTF) or naphthalene diimide (NDI) as redox-switchable building blocks are described with regard to their potential to form redox-switchable rotaxanes. A combination of isothermal titration calorimetry and voltammetric techniques reveals correlations between the binding energies and redox-switching properties of the corresponding ps…

RotaxaneSupramolecular chemistryElectrochemistryRedoxFull Research Papersupramolecular chemistrylcsh:QD241-441chemistry.chemical_compoundlcsh:Organic chemistryComputational chemistryredox chemistrysupramolekulaarinen kemialcsh:ScienceCrown etherchemistry.chemical_classificationOrganic ChemistryIsothermal titration calorimetry540Molecular machineisothermal titration calorimetryChemistryrotaxaneschemistrycrown etherlcsh:Q500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete WissenschaftenTetrathiafulvaleneBeilstein Journal of Organic Chemistry
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Chiroptical inversion of a planar chiral redox-switchable rotaxane.

2019

Reversible redox-switching of a planar chiral [2]rotaxane with a tetrathiafulvalene-bearing crown ether macrocycle generates a complete sign reversal of the main band in the ECD spectrum, as shown by experiment and rationalised by DFT calculations.

chemistry.chemical_classificationMaterials scienceRotaxane010405 organic chemistryGeneral Chemistry547Planar chirality010402 general chemistryElectrochemistry01 natural sciences0104 chemical sciencesChiral column chromatographyCrystallographychemistry.chemical_compoundChemistry500 Naturwissenschaften und Mathematik::540 Chemie::547 Organische Chemieredox-switchablechemistryElectronic effectrotaxanechiroptical inversionEnantiomermakromolekyylitTetrathiafulvaleneCrown etherChemical science
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CCDC 1910670: Experimental Crystal Structure Determination

2019

Related Article: Marius Gaedke, Felix Witte, Jana Anhäuser, Henrik Hupatz, Hendrik V. Schröder, Arto Valkonen, Kari Rissanen, Arne Lützen, Beate Paulus, Christoph A. Schalley |2019|Chemical Science|10|10003|doi:10.1039/C9SC03694F

Space GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates2-[45-bis(methylsulfanyl)-2H-13-dithiol-2-ylidene]-56891112141517182728-dodecahydro-2H-[13]dithiolo[45-t]naphtho[23-b][1471013161922]hexaoxadithiacyclotetracosine
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CCDC 1581480: Experimental Crystal Structure Determination

2018

Related Article: Hendrik V. Schröder, Felix Witte, Marius Gaedke, Sebastian Sobottka, Lisa Suntrup, Henrik Hupatz, Arto Valkonen, Beate Paulus, Kari Rissanen, Biprajit Sarkar, Christoph A. Schalley|2018|Org.Biomol.Chem.|16|2741|doi:10.1039/C8OB00415C

2-(67-dimethoxy-2H-[13]dithiolo[45-b][14]benzodithiin-2-ylidene)-45-bis(methylsulfanyl)-2H-13-dithiole-13-diium bis(tetrafluoroborate)Space GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1586984: Experimental Crystal Structure Determination

2018

Related Article: Hendrik V. Schröder, Felix Witte, Marius Gaedke, Sebastian Sobottka, Lisa Suntrup, Henrik Hupatz, Arto Valkonen, Beate Paulus, Kari Rissanen, Biprajit Sarkar, Christoph A. Schalley|2018|Org.Biomol.Chem.|16|2741|doi:10.1039/C8OB00415C

Space GroupCrystallographyCrystal SystemCrystal StructureCell Parameters2-[45-bis(methylsulfanyl)-2H-13-dithiol-2-ylidene]-67-dimethoxy-2H-[13]dithiolo[45-b][14]benzodithiineExperimental 3D Coordinates
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