Catalyst-Free Arylation of Tertiary Phosphines with Diaryliodonium Salts Enabled by Visible Light

The visible-light-induced arylation of tertiary phosphines with aryl(mesityl)iodonium triflates to produce the quaternary phosphonium salts occurs under mild, metal, and catalyst-free conditions. Photo-excited EDA complexes between diaryliodonium salts and phosphines supposedly enable this transformation, which is difficult to achieve through the traditional ground-state reactions. Demonstrating high functional group tolerance, broad scope, and complete selectivity of the aryl group transfer, the method is particularly compatible with sterically congested phosphines, which are challenging under metal-based catalytic methods.     

Ground State of the Conformal Flow on 𝕊3

We consider the conformal flow model derived in Bizoń et al. (2017) as a normal form for the conformally invariant cubic wave equation on 𝕊³. We prove that the energy attains a global constrained maximum at a family of particular stationary solutions that we call the ground state family. Using this fact and spectral properties of the linearized flow (which are interesting in their own right due to a supersymmetric structure), we prove nonlinear orbital stability of the ground state family. The main difficulty in the proof is due to the degeneracy of the ground state family as a constrained maximizer of the energy. © 2019 Wiley Periodicals, Inc.     

Cyclometallated 1,2,3-triazol-5-ylidene iridium(III) complexes: synthesis,structure, and photoluminescence properties

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α-Diphenylphosphino-N-(pyrazin-2-yl)glycine as a ligand in Ni-catalyzed ethylene oligomerization

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Misfit Stress Relaxation in α-Ga2O3/α-Al2O3 Heterostructures via Formation of Misfit Dislocations

Physics of the Solid State - A theoretical model of misfit stress relaxation in film/substrate α-Ga2O3/α-Al2O3 heterostructures with allowance for lattice anisotropy of heterostructure...     

Non-Standard Devices for Determination of Temperature Flammability Limits

Russian Journal of General Chemistry - Temperature flammability limits are one of the key indicators of fire and explosion hazard and are used in the development of measures, ensuring fire and...     

Method of Personalization of Photopolymer Security Holograms Based on Recording Hidden Encoded Digital Images

Optics and Spectroscopy - The scope of problems of embedding personal data when copying holograms on a photopolymer substrate with the maximum preservation of the region of a hologram during its...     

Mechanochemical Modification of Activated Carbon in Air

Russian Journal of Applied Chemistry - The effect exerted on the chemical properties and structure of activated carbon by the mechanical treatment as a modification procedure was studied....