A5055488759- Radical Photochemical Reactions
- Luminescence and Fluorescent Materials
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Organic Light-Emitting Diodes Research
- Advanced Photocatalysis Techniques
- CO2 Reduction Techniques and Catalysts
- Innovative Microfluidic and Catalytic Techniques Innovation
- TiO2 Photocatalysis and Solar Cells
- bioluminescence and chemiluminescence research
- N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
- Catalytic C–H Functionalization Methods
- Magnetism in coordination complexes
- Catalytic Cross-Coupling Reactions
- Photochromic and Fluorescence Chemistry
- Chalcogenide Semiconductor Thin Films
- Sulfur-Based Synthesis Techniques
- Electrocatalysts for Energy Conversion
- Catalytic Alkyne Reactions
- Advanced NMR Techniques and Applications
- Lanthanide and Transition Metal Complexes
- Extraction and Separation Processes
- Fluorine in Organic Chemistry
- Organometallic Complex Synthesis and Catalysis
Johannes Gutenberg University Mainz
2021-2024
University of Basel
2019-2020
University of Gothenburg
2020
Sensitized triplet–triplet annihilation (sTTA) is the most promising mechanism for pooling energy of two visible photons, but its applications in solution were so far limited to organic solvents, with a current maximum excited-singlet state 3.6 eV. By combining tailor-made iridium complexes naphthalenes, we demonstrate blue-light driven upconversion water unprecedented singlet-state energies approaching 4 The annihilators have outstanding excited-state reactivities enabling challenging...
Several energy-demanding photoreactions require harsh UV light from inefficient sources. The conversion of low-energy visible to high-energy singlet states via triplet-triplet annihilation upconversion (TTA-UC) could offer a solution for driving such reactions under mild conditions. We present the first annihilator with an emission maximum in UVB region that, combined organic sensitizer, is suitable blue-to-UVB upconversion. was successfully employed as energy donor subsequent FRET...
Photocatalysis holds great promise for changing the way value-added molecules are currently prepared. However, many photocatalytic reactions suffer from quantum yields well below 10%, hampering transition lab-scale to large-scale or even industrial applications. Molecular dyads can be designed such that beneficial properties of inorganic and organic chromophores combined, resulting in milder reaction conditions improved reactions. We have developed a novel approach obtaining advantages...
Photoactive complexes with earth-abundant metals have attracted increasing interest in the recent years fueled by promise of sustainable photochemistry. However, sophisticated ligands complicated syntheses are oftentimes required to enable photoactivity nonprecious metals. Here, we combine a cheap metal simple easily access photoactive complex. Specifically, synthesize molybdenum(0) carbonyl complex Mo(CO)3(tpe) featuring tripodal ligand 1,1,1-tris(pyrid-2-yl)ethane (tpe) two steps high...
Biphenyl at its best: a (triisopropylsilyl)ethynyl group in para position converts biphenyl into UV annihilator that is successfully employed for blue-to-UV upconversion with unprecedented output photon energies.
A robust photocatalyst for reactions under particularly sustainable conditions has been discovered. The importance of its photoactive triplet state elucidated by combining optical spectroscopy with lab-scale photocatalysis.
Metal complex - arene dyads typically act as more potent triplet energy donors compared to their parent metal complexes, which is frequently exploited for increasing the efficiencies of transfer applications. Using unexplored dicationic phosphonium-bridged ladder stilbenes (P-X2+) quenchers, we exclusively observed photoinduced electron photochemistry with commercial organic photosensitizers and photoactive complexes. In contrast, corresponding pyrene tested ruthenium complexes very same...
Photocatalysis holds great promise for changing the way how value-added molecules are currently prepared. However, many photocatalytic reactions suffer from lousy quantum yields, hampering transition lab-scale to large-scale or even industrial applications. Molecular dyads can be designed such that beneficial properties of inorganic and organic chromophores combined, resulting in milder reaction conditions improved yields reactions. We have developed a novel approach obtaining advantages...
Two novel bidentate C^C*spiro cyclometalated platinum(II) complexes comprising a spiro-conjugated bifluorene ligand and different β-diketonate auxiliary ligands are synthesized characterized. Their preparation employs robust elaborate synthetic protocol commencing with an N-heterocyclic carbene precursor. Structural characterization by means of NMR techniques solid-state structures validate the proposed herein presented molecular scaffolds. Photophysical studies, including laser flash...
Abstract A sterically overcrowded lanthanide‐chelating tag has been synthesized in order to investigate the influence on obtained pseudocontact shifts and anisotropic part of magnetic susceptibility tensor compared those its predecessor DOTA‐M8‐(4 R ,4 S )‐SSPy. For first time, a concise synthetic route is presented for isopropyl‐substituted cyclen, macrocyclic scaffold tag, delivering macrocycle an overall yield 6 % over 11 steps. The geometry lutetium complex assigned by ROESY experiments,...
Abstract The effects of backbone amine functionalization in three new homoleptic C^N^C type ruthenium(II) complexes bearing a tridentate bis‐imidazole‐2‐ylidene pyridine ligand framework are characterized and studied by single crystal diffraction, electrochemistry, optical spectroscopy transient absorption combination with ab initio DFT calculations. Functionalization dimethylamine groups 4‐position the significantly influences properties as revealed comparison unfunctionalized references....
Dye-sensitized solar cell (DSC) technology has been broadly investigated over the past few decades. The sandwich-type structure of DSC makes manufacturing undemanding under laboratory conditions but results in need for reproducible measurements acceptable characterization. Electrochemical impedance spectroscopy (EIS) offers possibility to study complex electronic systems and is commonly used cells. There a tendency literature present data only one representative device. At same time, as...
Photoactive complexes with earth-abundant metals have attracted increasing interest in the recent years fueled by promise of sustainable photochemistry. However, sophisticated ligands complicated syntheses are oftentimes required to enable photoactivity non-precious metals. Here, we combine a cheap metal simple easily access photoactive complex. Specifically, synthesize molybdenum(0) carbonyl complex Mo(CO)3(tpe) featuring tripodal ligand tris(pyridyl)ethane (tpe) two steps high overall...
Abstract Viele energetisch anspruchsvolle Photoreaktionen benötigen schädliches UV‐Licht aus ineffizienten Lichtquellen. Die Umwandlung von niederenergetischem sichtbarem Licht in hochenergetische Singulett‐Zustände über die Aufwärtskonversion durch Triplett‐Triplett‐Annihilierung (TTA‐UC) könnte eine Lösung bieten, um solche Reaktionen unter milden Bedingungen durchzuführen. Wir präsentieren den ersten Annihilator mit einem Emissionsmaximum im UVB‐Bereich, der Kombination organischen...
Sensitized triplet-triplet annihilation is the most promising mechanism for pooling energy of two visible photons, but its applications in solution were so far limited to organic solvents, with a current maximum excited-singlet state 3.6 eV. By combining tailor-made iridium complexes naphthalenes, we demonstrate blue-light driven upconversion water unprecedented singlet-state energies approaching 4 The annihilators have outstanding excited-state reactivities enabling challenging...
Sensitized triplet-triplet annihilation is the most promising mechanism for pooling energy of two visible photons, but its applications in solution were so far limited to organic solvents, with a current maximum excited-singlet state 3.6 eV. By combining tailor-made iridium complexes naphthalenes, we demonstrate blue-light driven upconversion water unprecedented singlet-state energies approaching 4 The annihilators have outstanding excited-state reactivities enabling challenging...