A5014714897- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Magnetism in coordination complexes
- Organometallic Complex Synthesis and Catalysis
- Photochemistry and Electron Transfer Studies
- Lanthanide and Transition Metal Complexes
- Molecular Junctions and Nanostructures
- Organic and Molecular Conductors Research
- Supramolecular Chemistry and Complexes
- Organic Electronics and Photovoltaics
- N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
- Porphyrin and Phthalocyanine Chemistry
- Luminescence and Fluorescent Materials
- Organic Light-Emitting Diodes Research
- Synthesis and Properties of Aromatic Compounds
University of Konstanz
2018-2024
We report on five tetranuclear metallamacrocycles with particularly large inner voids of up to 19.4 × 18.9 Å. The macrocyclic complexes were obtained by the self-assembly spatially extended organic dicarboxylate linkers two different dinuclear bis(alkenyl) diruthenium precursors. include one pair constitutional isomers, 2-NB and 2-BN, which differ respect whether incorporated triarylamine functionality is part "conductive" π-conjugated (2-NB) or insulating (2-BN). All characterized NMR...
The Pt(bodipy)-(mercaptopyrene) dyad BPtSPyr shows four different emissions: intense near-infrared phosphorescence (Φph up to 15%) from a charge-transfer state pyrS˙+-Pt-BDP˙-, additional fluorescence and emissions the 1ππ* 3ππ* states of bodipy ligand at r.t., pyrene in glassy matrix 77 K.
We report on a series of dinuclear 1,4-divinylanthrylene-bridged diruthenium complexes 1A-Ru-PR3 with different phosphine ligands (PiPr3, PiPr2Me, PPh3, and PMe3) coordination numbers five or six. All compounds were characterized by NMR spectroscopy, high resolution ESI-MS and, in the case 1A-Ru-PiPr3 1A-Ru-PMe3, single crystal X-ray diffraction. Cyclic voltammetry measurements reveal that PR3 ligands, besides tuning redox potentials, exert strong influence stability their one- two-electron...
We report on the synthesis of new bis(alkenylruthenium) complex DBTTF-(ViRu)2 with a longitudinally extended, π-conjugated dibenzotetrathiafulvalene (DBTTF) bridge, characterized by multinuclear NMR, IR, and UV/vis spectroscopy, mass spectrometry, single-crystal X-ray diffraction. Cyclic square-wave voltammetry revealed that undergoes four consecutive oxidations. UV/vis/near-IR, electron paramagnetic resonance spectroscopy indicate first oxidation involves redox-noninnocent DBTTF while...
Complexes PyrDPE-RuCl and PyrDPE-Ruacac with a π-extended 2,7-di(4-phenylethynyl)pyrene linker undergo simultaneous one-electron oxidations of their {Ru}-styryl entities. The absence an intervalence charge-transfer (IVCT) band at intermediate stages, where the mixed-valent, singly oxidized radical cation is present, spin density confinement to terminal styryl ruthenium site(s) are tokens lack electronic coupling between {Ru} entities across π-conjugated linker. close similarity linker-based...
We report on the photophysical properties of three dyads that combine a 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (bodipy, BDP) and mercaptopyrene (SPyr) dye ligand at Pt(PEt3)2 fragment. σ-Bonding dyes to Pt ion promotes intersystem crossing (ISC) via external heavy atom effect. The coupling efficient ISC with charge-transfer from electron-rich electron-accepting BDP (PB-CT) gives rise multitude (potentially) emissive states. This culminates in presence four different emissions for mono-...
Three binary charge-transfer (CT) compounds resulting from the donor 2,2′ : 6′,2′′ 6′′,6-trioxotriphenylamine (TOTA) and acceptors F 4 TCNQ BQ of a pyrene-annulated azaacene (PAA) with acceptor are reported.
We report on dinuclear alkenylruthenium complexes with π-extended trans,trans-distyrylbenzene (1-V) or 1,4-(2-phenylethynyl)benzene (1-A) linkers akin to oligophenylvinylene and oligophenylethynylene oligomers (OPV-3 OPE-3, respectively) the macrocylic analogue 2-A. All compounds were characterized by NMR spectroscopy high-resolution ESI-MS. Their electrochemical spectroscopic properties examined. The efficacy of intramolecular through-bond electron transfer in their mixed-valent,...
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