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24 Apr 2024 • Journal Article • ChemPhysChem
Principal singlet fission properties of twisted acenes
AbstractAcenes, especially tetracene derivatives, are used as singlet fission materials. The recent synthesis of Dodecaphenyl tetracene (showing end-to-end twist angles of 96-98 degrees) and twisted anthracene derivatives show that the synthesis of twisted linear oligoacenes is possible. Energy calculations and NICS-X-scan studies predict the twisted acenes may be better singlet
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24 Apr 2024 • Journal Article • Organic Letters
Stereoselective Nucleophilic Halogenation at CF3-Substituted Nonclassical Carbocation
AbstractCF3-substituted cyclopropyl carbinol derivatives undergo regioselective and diastereoselective nucleophilic halogenation at the quaternary carbon center to provide acyclic products as a single diastereomer. The selectivity of the substitution is rationalized by the formation of a nonclassical cyclopropylcarbinyl cation intermediate, reacting at the most-substituted
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23 Apr 2024 • Preprint • ChemRxiv
Fluorophore Concentration Controls the Homo-FRET Efficiency and Directionality across Proteins both in Solution and in Solid Protein Matrices
AbstractLight harvesting in nature is one of the most important processes, starting with the absorption of light by chromophores within proteins and the transfer of energy from one another via the Förster resonance energy transfer (FRET) mechanism. If the energy is transferred between identical chromophores, the resulting is Homo-FRET. Here, we introduce an artificial system
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22 Apr 2024 • Journal Article • Organometallics
Enantioselective Hydroboration of Styrenes with Markovnikov Selectivity Catalyzed by a Rhodium(I)-NHC Complex
AbstractAsymmetric catalysis with phosphine free ligands is a rapidly developing field where N-heterocyclic carbenes (NHCs) are making increasingly more impact. Herein, we report the synthesis and characterization of carbene-oxazoline containing proligands that exhibit two chiral centers. The corresponding rhodium(I) complexes show excellent activity toward the asymmetric
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18 Apr 2024 • Patent • Applied at: WO
Chemically stable ion conductors and uses thereof
AbstractPolymeric ion conductors composed of a polymeric matrix associated with an isoindolinium moiety represented by Formula I as described in the specification are provided. Anion conducting compositions comprising an anion conducting polymer associated with, or threaded within and having mechanically interlocked therearound, a cyclic moiety are also provided. lonomeric
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17 Apr 2024 • Journal Article • Inorganic Chemistry
Surprising Route to a Monoazaporphyrin and Full Characterization of Its Complexes with Five Different 3d Metals
AbstractIn the search for mild agents for the oxidative cyclization of tetrapyrromethane to the corresponding corrole, we discovered a route that leads to a monoazaporphyrin with three meso-CF3 groups. Optimization studies that allowed access to appreciable amounts of this new macrocycle paved the way for the preparation of its cobalt, copper, nickel, zinc, and iron complexes
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12 Apr 2024 • Journal Article • 2D Materials
Tuning magnetic and optical properties in MnxZn1-xPS3 single crystals by the alloying composition
AbstractThe exploration of two-dimensional (2D) antiferromagnetic (AFM) materials has shown great promise and interest in tuning the magnetic and electronic properties as well as studding magneto-optical effects. The current work investigates the control of magneto-optical interactions in alloyed MnxZn1-xPS3¬ lamellar semiconductor single crystals, with the Mn/Zn ratio regulating
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10 Apr 2024 • Journal Article • Angewandte Chemie International Edition
Controllable Skeletal and Peripheral Editing of Pyrroles with Vinylcarbenes
AbstractThe skeletal editing of azaarenes through insertion, deletion, or swapping of single atoms has recently gained considerable momentum in chemical synthesis. Here, we describe a practical skeletal editing strategy using vinylcarbenes in-situ generated from trifluoromethyl vinyl N-triftosylhydrazones, leading to the first dearomative skeletal editing of pyrroles through
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10 Apr 2024 • Journal Article • Applied Surface Science
Depth profiling of microwave nitrogen-terminated polycrystalline diamond surfaces by energy-dependent X-ray photoelectron spectroscopy
AbstractNitrogen-terminated diamonds hold promise for stabilizing near-surface NV− centers, which is essential for reliable quantum sensing. Among various surface preparation methods, microwave (MW) nitrogen plasma, known for its minimal surface damage, appears as the most effective choice. In this investigation, we explore the nature of nitrogen bonding of polycrystalline
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9 Apr 2024 • Preprint
Quantitative Synthesis of Pt-Si-C Cyclopropane and its Unusual Complexation with Benzene
AbstractIn this paper, we report the quantitative synthesis of the first Pt-silene -complex and its unusual interaction with benzene molecule in the solid state, revealed by X-ray crystallography. Thus, three platinum complexes dock on one benzene molecule via weak van der Waals-type interactions with the benzene hydrogens. The cyclopropane nature of the complex was confirmed
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