Бромирование высоко-деактивированных ароматических систем с применением тетрафторобромата бария

It has been shown that Ba(BrF[4])[2] acted as a highly-active brominating agent. In case of interaction with nitrobenzene, the pure 3-bromo-nitrobenzene is formed. It has been shown that typical electrophilic bromination of the aromatic compound with electron donating and electron-accepting substituents occurred without any catalysts or hard conditions

Plasmon polaritons of metallic nanowires for controlling submicron propagation of light

Abstract: The optical resonances of individual plasmonic dimer antennas are investigated using confocal darkfield spectroscopy. Experiments on an array of antennas with varying arm lengths and interparticle gap sizes show large spectral shifts of the plasmon modes due to a combination of geometrical resonances and plasmon hybridization. The resonances of the coupled-dimer antennas are considerably broadened compared to those of single nanorods, which is attributed to a superradiant damping of the coupled antenna modes. The scattering spectra are compared with electrodynamic model calculations that demonstrate both the near-field and far-field characteristics of a half-wave antenna