Crystal structure and Raman spectra of molecular complex {Cd(Et2dtc)}2·DABCO ·C60·(DABCO)2 at high pressure
https://doi.org/10.17586/2220-8054-2018-9-1-33-37
Abstract
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 Bt = 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.
Supporting agencies: The main financial support by the Federal Agency for Scientific Organizations is greatly acknowledged. The partial support by the Russian Foundation for Basic Research, grant No. 15-02-01495, and the RAS Presidium Program “Physics of compressed matter” are greatly acknowledged. K. P. M. thanks the Aristotle University of Thessaloniki for hospitality.
About the Authors
A. V. Kuzmin
Institute of Solid State Physics, Russian Academy of Sciences
Russian Federation
Russian Federation
142432 Chernogolovka, Moscow region
D. V. Konarev
Institute of Problems of Chemical Physics, Russian Academy of Sciences
Russian Federation
Russian Federation
142432 Chernogolovka, Moscow region
S. S. Khasanov
Institute of Solid State Physics, Russian Academy of Sciences
Russian Federation
Russian Federation
142432 Chernogolovka, Moscow region
K. P. Meletov
Institute of Solid State Physics, Russian Academy of Sciences
Russian Federation
Russian Federation
142432 Chernogolovka, Moscow region
Review
For citations:
Kuzmin A.V., Konarev D.V., Khasanov S.S., Meletov K.P. Crystal structure and Raman spectra of molecular complex {Cd(Et2dtc)}2·DABCO ·C60·(DABCO)2 at high pressure. Nanosystems: Physics, Chemistry, Mathematics. 2018;9(1):33-37. https://doi.org/10.17586/2220-8054-2018-9-1-33-37
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