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SUMMARY:X-RAY PHOTOELECTRON SPECTROSCOPY AND NEAR EDGE X-RAY ABSORPTION FI
 NE STRUCTURE SPECTROSCOPY STUDY OF SYNCHROTRON RADIATION EFFECTS ON FLUORI
 NATED GRAPHITE INTERCALATED N2O4
DTSTART;VALUE=DATE-TIME:20200715T105000Z
DTEND;VALUE=DATE-TIME:20200715T111000Z
DTSTAMP;VALUE=DATE-TIME:20260513T164958Z
UID:indico-contribution-1867@indico.inp.nsk.su
DESCRIPTION:Speakers: Galina Semushkina (Nikolaev Institute of Inorganic C
 hemistry)\nFluorinated graphite (FG) attracts the attention of researchers
  due to a wide range of physicochemical properties\, which is promising fo
 r its use as an element base of microelectronic devices (LED elements\, ga
 s sensors\, etc.)\, and also as a cathode for lithium-ion batteries. More 
 importantly\, recent studies have shown that intercalated systems based on
  graphite and its derivatives can be used as a nanoreactor. In these devic
 es\, the layering of graphite and its screening effect allows you to purpo
 sefully change the reactivity of molecules and regulate the activity of fu
 nctional groups on the surface. In addition\, the subsequent thermal or ph
 otochemical treatment of fluoride graphite intercalated compound (FGIC)\, 
 including irradiation with high-intensity light\, can lead to a significan
 t restructuring of the electronic structure of the system\, which opens up
  new possibilities for using FG.\nFor the purpose of a detailed analysis o
 f the mechanism of processes occurring on the surface of FGIC under the in
 fluence of thermal and photochemical effects\, a comprehensive study of th
 e electronic structure of intercalated N2O4 fluorinated graphite С2F0.8-0
 .9 before and after continuous in situ illumination with polychromatic pho
 ton beam of high intensity (zero-order light from the dipole beamline of B
 ESSY II synchrotron radiation facility). X-ray photoelectron spectroscopy 
 (XPS)\, near-edge X-ray absorption fine structure (NEXAFS)\, and Fourier t
 ransform infrared spectroscopy (FTIR) are used for this. \nThus\, the effe
 ct of synchrotron radiation on the atomic and electronic structure of FGIC
  C2F0.8-0.9 N2O4 has been studied. It was found that in the initial sample
 s of N2O4 on the surface\, the FG is in an equilibrium mixture with variou
 s nitrogen-containing functional groups NO2\, NO\, NO3\, N2. Thermal and p
 hotochemical effects on FGIC lead to defluorination of the sample and the 
 formation of defects\, on the edge of which CF2 and CF3 bonds arise. In ad
 dition\, the FG matrix recovery in progress with partial removal of the in
 tercalate.\nThis work was supported by RFBR grant № 18-29-19073 мк.\n\
 nhttps://indico.inp.nsk.su/event/24/contributions/1867/
LOCATION:Zoom Zoom 860 5034 1820
URL:https://indico.inp.nsk.su/event/24/contributions/1867/
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