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Showing 1–7 of 7 results
Advanced filters: Author: Roman A. Novikov Clear advanced filters

  • The direct C–H activation of inert C(sp3)–H bonds in a hydrocarbon chain is an attractive target in organic synthesis but C-H activation driven by vinyl carbocations remains underdeveloped. Here, the authors design a double C(sp3)–H functionalization of unactivated alkyl CH2 groups to produce substituted quaternary carbon stereocenter via insertion of vinyl carbocations.

    • Roman A. Novikov
    • Denis D. Borisov
    • Yury V. Tomilov
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-11

  • Divergent catalytic asymmetric reactions for the selective formation of C(sp3)−H insertion and formal C(sp3)−O insertion products from the same precursors are rarely explored. Here, the authors report a ligand-controlled divergent asymmetric C(sp3)–H insertion and formal C(sp3)–O insertion reaction via vinyl cations, leading to the assembly of a range of chiral spiro and fused polycyclic pyrroles.

    • Cui-Ting Li
    • Li-Gao Liu
    • Long-Wu Ye
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-12

  • Principal optical axes define light-matter interactions in crystals and they are usually assumed to be stationary. Here, the authors report the observation of wavelength-dependent principal optical axes in ternary van der Waals crystals (ReS2 and ReSe2), leading to wavelength-switchable propagation directions of their waveguide modes.

    • Georgy A. Ermolaev
    • Kirill V. Voronin
    • Kostya S. Novoselov
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-8

  • The authors combine films of two-dimensional semiconductors, which exhibit excitonic spectral features, with SiO2/Si Fabry-Perot resonators in order to realize topological phase singularities in reflection. Around these singularities, the reflection spectra demonstrate rapid phase changes while the structure behaves as a perfect absorber.

    • Georgy Ermolaev
    • Kirill Voronin
    • Valentyn Volkov
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-9