NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2018, 9 (1), P. 33–37
Crystal structure and Raman spectra of molecular complex [{Cd(Et2dtc)}2• DABCO]• C60• (DABCO)2 at high pressure
A.V. Kuzmin – Institute of Solid State Physics, Russian Academy of Sciences, 142432 Chernogolovka, Moscow region, Russia; kuzmin@issp.ac.ru
D.V. Konarev – Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432 Chernogolovka, Moscow region, Russia
S. S. Khasanov – Institute of Solid State Physics, Russian Academy of Sciences, 142432 Chernogolovka, Moscow region, Russia
K. P. Meletov – Institute of Solid State Physics, Russian Academy of Sciences, 142432 Chernogolovka, Moscow region, Russia
The crystal structure of the molecular donor-acceptor complex [{Cd(Et2dtc)}2• DABCO]• C60• (DABCO)2 (where dtc is dithiocarbamate, DABCO is diazabicyclooctane) was studied by X-ray diffraction (XRD) at high pressure using the diamond anvil cell (DAC) technique. The pressure dependence of lattice parameters is smooth and monotonous, the bulk modulus and its derivative B0 = 7.94 GPa and B’ = 9.65 are close to those of pristine C60. Raman spectra of the complex measured at λexc = 532 nm showed a peculiarity in the pressure dependence of Ag(1), Ag(2), Hg(1) and Hg(7) modes of the C60 molecule near 2 GPa. This peculiarity relates to pressure-assisted photopolymerization in the fullerene layers which is suppressed in Raman measurements at λexc = 785 nm showing smooth pressure behavior of phonon modes.
Keywords: high pressure, fullerene complexes, crystal structure, photopolymerization.
PACS 78.30.Na
DOI 10.17586/2220-8054-2018-9-1-33-37
