A5041369199- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Organic Light-Emitting Diodes Research
- Organometallic Complex Synthesis and Catalysis
- Metal complexes synthesis and properties
- Molecular Junctions and Nanostructures
- Catalytic Cross-Coupling Reactions
- Lanthanide and Transition Metal Complexes
- N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
- Luminescence and Fluorescent Materials
- Solidification and crystal growth phenomena
- Fluorine in Organic Chemistry
- Synthesis and characterization of novel inorganic/organometallic compounds
- Aluminum Alloy Microstructure Properties
- Diverse Industrial Engineering Technologies
- DNA and Nucleic Acid Chemistry
- Advanced Chemical Physics Studies
- Electrochemical Analysis and Applications
- Synthesis and Characterization of Heterocyclic Compounds
- Advanced Physical and Chemical Molecular Interactions
- Catalytic Alkyne Reactions
- Radical Photochemical Reactions
- Fullerene Chemistry and Applications
- Photochemistry and Electron Transfer Studies
- Metal-Organic Frameworks: Synthesis and Applications
University of Cologne
2017-2022
Schott (Germany)
2002
Fraunhofer Institute for Integrated Systems and Device Technology
2002
Leibniz Institute for Solid State and Materials Research
1998
In the framework of our attempts to develop cyclometalated Pt(II) complexes toward bifunctional targeting inhibitors or agents for photodynamic therapy, diagnostics, and bioimaging, a series bis-cyclometalated [Pt(CNC)(L)] (L = DMSO, MeCN) containing various (CNC)2– ligands based on 2,6-diphenylpyridine were synthesized characterized analytically spectroscopically, focusing their electrochemical, luminescence, antiproliferative properties. Electrochemical experiments UV–vis absorption...
Cyclometalated complexes [M(Phbpy)(CN)] (HPhbpy = 6-phenyl-2,2′-bipyridine) of the group 10 metals (Ni, Pd, and Pt) bearing a carbanionic –C∧N∧N pincer ligand were synthesized studied in combined experimental computational DFT approach. All three crystallographically characterized showing closely packed dimers with head-to-tail stacking short metal-metal contacts solid state. The models for geometries, excited states, electronic transitions addressed both monomeric (Ni-mono, Pd-mono,...
Bis‐cyclometalated Pt II complexes of dianionic 2,5‐bis(aryl)‐pyridine ligands (L 1–6 ) 2– , carrying various cyclometalating or pending aryl groups, are synthesised in two steps. The reactions H 2 L protoligands with K [PtCl 4 ] acetic acid give the mono‐cyclometalated [Pt(HL)Cl] . Heating these hot DMSO (dimethyl sulfoxide) yields double‐cyclometalated [Pt(L )(DMSO)]. reaction )(DMSO)] N ‐dimethylimidazolium iodide presence KO t Bu as base gives carbene complex )(Me Imd)]. Detailed...
Abstract Cyclometalated Pd(II) complexes generally show inferior luminescence properties compared with their Pt(II) analogues. The established approach employing tridentate cyclometalating ligands has allowed us to create a series of square planar [Pd( )X] from protoligands H (2‐(6‐phenylpyridin‐2‐yl)thiazoles and ‐benzothiazoles; coligands X=Cl, Br, I) extensive variations at the C arene group (phenyl, naphthyl, fluorenyl), central N pyridine (pyridine, 4‐phenylpyridine, 3,5‐di‐ tert...
The 5‐aryl‐3‐(2′‐pyridiyl)‐1,2,4‐triazine ligands under study [5‐phenyl‐(PyTZPh) L 1 ; 5‐(3‐methoxyphenyl)‐(PyTZ3MeOPh) 2 5‐(4‐methoxyphenyl)‐(PyTZ4MeOPh) 3 5‐(4‐trifluoromethylphenyl)‐(PyTZ4CF Ph) 4 5‐(4‐fluorophenyl)‐(PyTZ4FPh) 5 and tris‐3,5,6‐(2′‐pyridyl)‐1,2,4‐triazine (Py TZ) 6 ] react with [(COD)PdCl (COD = 1,5‐cyclooctadiene) to form complexes [( – )PdCl N,N bidentate binding ligands, also including the potentially N,N,N tridentate ligand . This was concluded from an in‐depth NMR...
A series of cyclometalated Pt(II) complexes [Pt(C^N^N)X] (X = Cl, CCPh, CCC6F5) was synthesised from the protoligands HC^N^N containing either phenyl (ph), naphthyl (na) or (benzo)thiophenyl (b(th)) C aryl functions and pyridyl (py) (benzo)thiazolyl ((b)tz) peripheral N units, alongside central 4-phenyl-pyridyl (ppy) tBu2-phenyl-pyridyl (tbppy) group. Depending on combination building blocks, these square planar reveal very different electrochemical, UV-vis absorption emission behaviour....
The electrochemistry and photophysics of the Pt(II) complexes [Pt(naphen)(X)] (Hnaphen = naphtho[1,2-b][1,10]phenanthroline, X Cl or C≡CPh) containing rigid tridentate C^N^N-coordinating pericyclic naphen ligand was studied alongside tetrahydro-derivative [Pt(thnaphen)(X)] (Hthnaphen 5,6,8,9-tetrahydro-naphtho[1,2-b][1,10]phenanthroline) N^C^N-coordinated complex [Pt(bdq)(Cl)] (Hbdq benzo[1,2-h:5,4-h']diquinoline. cyclic voltammetry showed reversible reductions for C^N^N complexes, with...
In a series of Pt(II) complexes [Pt(dba)(L)] containing the very rigid, dianionic, bis-cyclometalating, tridentate C^N^C2− heterocyclic ligand dba2− (H2dba = dibenzo[c,h]acridine), coligand (ancillary ligand) L dmso, PPh3, CNtBu and Me2Imd (N,N’-dimethylimidazolydene) was varied in order to improve its luminescence properties. Beginning with previously reported dmso complex, we synthesized derivatives characterized them by elemental analysis, 1H (and 31P) NMR spectroscopy MS. Cyclic...
Abstract Reactions of the organoplatinum complex [Pt(cod)(neoSi)Cl] (neoSi = (trimethylsilylmethyl) with Ag(I) salts oxo or fluoride containing anions A – NO 3 , ClO 4 OTf (trifluoromethanesulfonate) and SbF 6 lead to desired abstraction chlorido ligand precipitation AgCl. However, further reaction resulting Pt complexes [Pt(cod)(neoSi) (solvent)] + diverse N-heterocyclic ligands L such as pyridines, caffeine, guanine did not yield targeted [Pt(cod)(neoSi)(L)](A) in most cases, but extensive...
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation L. Dunsch, P. Kuran, M. Krause; Heterogeneous electron transfer at endohedral fullerenes. AIP Conf. Proc. 11 August 1998; 442 (1): 373–378. https://doi.org/10.1063/1.56518 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Dropdown Menu...
Abstract Die als Folge des Elektronentransfers zwischen Radikalkationen und ‐anionen über einen Triplett‐Mechanismus entstehende Lumineszenz gemischter Systeme von 13 monomeren bzw. dimeren N‐Aryl‐Az‐pyrazolinen mit polycyclischen aromatischen Kohlenwasserstoffen wie Rubren, Rubicen, Perylen, Anthracene, Pyren oder Chrysen Carbonylverbindungen Benzophenonderivate substituierte Benzile wird in Dimethylformamid untersucht.