A5089125270- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Radical Photochemical Reactions
- Photochemistry and Electron Transfer Studies
- Catalytic C–H Functionalization Methods
- Advanced Chemical Physics Studies
- Spectroscopy and Quantum Chemical Studies
- Electrochemical Analysis and Applications
- Oxidative Organic Chemistry Reactions
- Photoreceptor and optogenetics research
- Supramolecular Chemistry and Complexes
- Phenothiazines and Benzothiazines Synthesis and Activities
- Sulfur-Based Synthesis Techniques
- Synthesis of Indole Derivatives
- Synthesis and Reactivity of Heterocycles
- Luminescence and Fluorescent Materials
- Cyclopropane Reaction Mechanisms
- Organometallic Complex Synthesis and Catalysis
- Synthesis and Biological Evaluation
- Organic Electronics and Photovoltaics
- Metal complexes synthesis and properties
- Advanced Photocatalysis Techniques
- CO2 Reduction Techniques and Catalysts
- Porphyrin and Phthalocyanine Chemistry
- Metal-Catalyzed Oxygenation Mechanisms
University of Rostock
2019-2025
Fundación Miguel Lillo
2023
Zero to Three
2021
Leibniz Institute for Catalysis
2019
Controlling the order and lifetimes of electronically excited states is essential to effective light-to-potential energy conversion by molecular chromophores. This work reports a luminescent photoreactive iron(II) complex, first performant group homologue prototypical sensitizers ruthenium. Double cyclometalation phenylphenanthroline framework at favors population triplet metal-to-ligand charge transfer (3MLCT) state as lowest state. Near-infrared (NIR) luminescence exhibits monoexponential...
Although iron is a dream candidate to substitute noble metals in photoactive complexes, realization of emissive and compounds demanding due the fast deactivation their charge-transfer states. Emissive are scarce dual emission has not been observed before. Here we report FeIII complex [Fe(ImP)2][PF6] (HImP = 1,1'-(1,3-phenylene)bis(3-methyl-1-imidazol-2-ylidene)), showing Janus-type from ligand-to-metal charge transfer (LMCT)- metal-to-ligand (MLCT)-dominated This behaviour achieved by ligand...
Herein, we demonstrate a working prototype of conjugated proton crane, reversible tautomeric switching molecule in which truly intramolecular long-range transfer occurs solution at room temperature. The system consists benzothiazole rotor attached to 7-hydroxy quinoline stator. According the experimental and theoretical results, OH is delivered under irradiation quinolyl nitrogen atom through series consecutive twisting steps. use rigid prevents undesired side processes that decrease...
A series of CoIII complexes [Co(RImP)2][PF6], with HMeImP = 1,1'-(1,3-phenylene)bis(3-methyl-1-imidazole-2-ylidene)) and R Me, Et, iPr, nBu, is presented in this work. The influence the strong donor ligand on ground excited-state photophysical properties was investigated context different alkyl substituents at imidazole nitrogen. X-ray diffraction revealed no significant alterations structures all differences emerge from electronic structures. These were probed via cyclic voltammetry UV-vis...
A series of 4- and 10-benzoyl-1-azapyrenes were prepared by a combination Pd-catalyzed cross-coupling reactions Brønsted-acid-mediated alkyne-carbonyl-metathesis (ACM). The photophysical electrochemical properties the products studied compared to theoretical results.
In this study, we present a slight but surprisingly successful structural modification of the previously reported heteroleptic Cu(I) photosensitizer Cubiipo ([(xantphos)Cu(biipo)]PF6; biipo = 16H-benzo-[4',5']-isoquinolino-[2',1':1,2]-imidazo-[4,5-f]-[1,10]-phenanthrolin-16-one). As key feature, bears naphthalimide unit at back, which is directly fused to phenanthroline moiety extend conjugated π-system. This ligand was now altered include two additional methyl groups 2,9-positions scaffold....
We present a computational approach for predicting key properties of organic radical anions, including excited-state lifetimes and redox potentials.
A new mechanism for light-driven water splitting is described, which decreases the reaction's complexity and offers a way to extend range of usable wavelengths far into visible region.
Ru(II)- and Cu(I)-based photosensitizers featuring the recently developed biipo ligand (16H-benzo-[4',5']-isoquinolino-[2',1',:1,2]-imidazo-[4,5-f]-[1,10]-phenanthrolin-16-one) were comprehensively investigated by X-ray crystallography, electrochemistry, especially several time-resolved spectroscopic methods covering all time scales from femto- to milliseconds. The analysis of experimental results is supported density functional theory (DFT) calculations. consists a coordinating...
Hitherto unknown 5,8-substituted-pyrimido[4,5,6-ij]pyrrolo[2,1,5-de]quinolizines (5,7-diazaullazines) were prepared by a three-step synthesis via Clauson-Kaas, Sonogashira, and cycloisomerization reactions with diverse functionalization. The properties, including cyclovoltammetry UV–vis fluorescence spectroscopy, as well solvatochromism, studied for selected derivatives supported density functional theory calculations. Results compared in detail previously reported 5- 6-azaullazines, the...
Herein we report the photo- and electrochemical characterization of pyrimidopteridine N-oxide-based heterocycles. The potential their application as organic photoredox catalysts is showcased in photomediated contra-thermodynamic E→Z isomerization cinnamic acid derivatives oxidative cyclization 2-phenyl benzoic to benzocoumarin using molecular oxygen a mild oxidant. Furthermore, unprecedented intermolecular non-covalent n-π-hole interactions solid state are discussed based on crystallographic...
Abstract Herein we describe the synthesis and photophysical electrochemical characterization of pyrimidopteridine‐based photoredox catalysts. The pyrimidopteridines can be obtained from corresponding N ‐oxides through photo‐mediated oxygen atom transfer to a sacrificial acceptor molecule on gramscale. presence triplet excited state was evidenced by means transient absorption spectroscopy. Pyrimidopteridines are potent oxidants with reduction potentials exceeding +2.10 V vs. SCE in MeCN....
We present a computational approach for predicting key properties of organic radical anions, including excited-state lifetimes and redox potentials. The shows good agreement with experimental data has potential in silico screening to facilitate the rational design photocatalysts.