Pressure-assisted photopolymerization in the molecular donor-acceptor fullerene complex {Cd(dedtc)2}2C60
https://doi.org/10.17586/2220-8054-2016-7-1-133-139
Abstract
The pressure-assisted photopolymerization in the fullerene complex {Cd(dedtc)2}2·C60 (fullerene complex with cadmium diethyldithiocarbamate) observed in the pressure region between 2.24 and 5.99 GPa was studied in detail. After a phase transition near ∼ 2 GPa, the Raman spectra exhibit time-dependent changes under prolonged laser illumination regarding the appearance of new peaks in the frequency region of the Ag(2) mode of the C60 monomer. These peaks are related to the fullerene oligomers with a different number of sp3-like coordinated carbon atoms per molecular cage. The polymer content increases with the laser power density and exposure time, while for a fixed laser power, its saturated value is independent of pressure. Outside the pressure range 2.24 – 5.99 GPa, photopolymerization is suppressed.
Supporting agencies: The support by the Russian Foundation for Fundamental Research, grant No. 15-02-01495, and the RAS Presidium Program “Physics of compressed matter” are greatly acknowledged. The authors are grateful to Dr. D. Konarev for providing the fullerene complexes.
About the Authors
K. P. Meletov
Institute of Solid State Physics, Russian Academy of Sciences
Russian Federation
Russian Federation
Chernogolovka, Moscow region
J. Arvanitidis
Aristotle University of Thessaloniki
Greece
Greece
GR-54 124 Thessaloniki
D. Christofilos
Aristotle University of Thessaloniki
Greece
Greece
GR-54 124 Thessaloniki
G. Kourouklis
Aristotle University of Thessaloniki
Greece
Greece
GR-54 124 Thessaloniki
References
1. Konarev D.V., Khasanov S.S., et al. Formation of single-bonded (C6͞0)2 and (C7͞0)2 dimers in crystalline ionic complexes of fullerenes. J. Am. Chem. Soc., 2003, 125, P. 10074–10083.
2. Konarev D.V., Khasanov S.S., et al. Negatively charged π-(C− )2 dimer with biradical state at room temperature. J. Am. Chem. Soc., 2006, 128, P. 9292–9293.
3. Meletov K.P., Dolganov V.K., Set al. Pressure-induced charge-transfer phase transition in crystalline C60·{C10H12Se42(CS2)} molecular complex studied by Raman spectroscopy. Chem. Phys. Lett., 1997, 281, P. 360–365.
4. Cui Wen, Yao Mingguang, et al. Reversible polymerization in doped fullerides under pressure: the case of C60·{Fe(C5H5)2}2. J. Phys. Chem. B, 2012, 116, P. 2643–2650.
5. Meletov K.P., Konarev D.V. Raman study of the pressure-induced charge transfer transition in the neutral donor-acceptor complexes {Ni(nPr2dtc)2}·(C60)2 and {Cu(nPr2dtc)2}·(C60)2. Full. Nanotub. Carbon Nanostr., 2012, 20, P. 336–340.
6. Meletov K.P., Konarev D.V. Raman study of the pressure-induced phase transitions in the molecular donor-acceptor complex {Pt(dbdtc)2}C60. Chem. Phys. Lett., 2012, 553, P. 21–25.
7. Meletov K.P. Phase transitions at high pressure in the donor-acceptor complexes of C60 studied by Raman spectroscopy. High Pressure Research, 2013, 33, P. 114–118.
8. Meletov K.P. Phase transitions at high pressure in the fullerene C60 molecular donor-acceptor complex {Hg(dedtc)2}2·C60. Physics Solid State, 2014, 56, P. 1689–1695.
9. Meletov K.P., Konarev D.V., Tolstikova A.O. Phase transitions and photoinduced transformations at high pressure in the molecular donor-acceptor fullerene complex {Cd(dedtc)2}2·C60. JETP, 2015, 120, P. 989–997.
10. Rao A.M., Zhou P., et al. Photoinduced polymerization of solid C60 films. Science, 1993, 259, P. 955–957.
11. Stephens P.W., Bortel G., et al. Polymeric fullerene chains in RbC60 and KC60. Nature, 1994, 370, P. 636–639.
12. Iwasa Y., Arima T., et al. New phases of C60 synthesized at high pressure. Science, 1994, 264, P. 1570–1572.
13. Nunez-Regueiro M., Marques L., et al. Polymerized fullerite structures. Phys. Rev. Lett., 1995, 74, P. 278–281.
14. Zhou P., Dong Z.H., Rao A.M., Ecklund P.C. Reaction mechanism for photopolymerization of solid fullerene C60. Chem. Phys. Lett., 1993, 211, P. 337–340.
15. Pusztai T., Oszlanyi G., et al. Bulk structure of phototransformed C60. Solid State Commun., 1999, 111, P. 595–599.
16. Karachevtsev V.A., Mateichenko P.V., et al. Effective photopolymerization of C60 films under simultaneous deposition and UV light irradiation: Spectroscopy and morphology study. Carbon, 2004, 42, P. 2091–2098.
17. Davydov V.A., Kashevarova L.S., et al. Spectroscopic study of pressure polymerized phases of C60. Phys. Rev. B, 2000, 61, P. 11936–11945.
18. Konarev D.V., Khasanov S.S., et al. Fullerene complexes with divalent metal dithiocarbamates: structures, magnetic properties, and photoconductivity. Russ. Chem. Bull. Int. Ed., 2007, 56, P. 2145–2161.
19. Jayaraman A. Ultrahigh pressures. Rev. Sci. Instrum., 1986, 57, P. 1013–1031.
20. Meletov K.P., Arvanitidis J., Christofilos D., Kourouklis G. Comparative Raman study of the photo-oligomers stability in the donor-acceptor fullerene complex {Pt(dbdtc)2}·C60 and pristine C60. Nanosystems: Physics, Chemistry, Mathematics, 2016, 7 (1), P. 125-132.
21. Meletov K.P., Davydov V.A., et al. High pressure photoinduced polymerization of the orthorhombic polymeric phase of C60. Chem. Phys. Lett., 2005, 416, P. 220–224.
22. Le Parc R., Levelut C., et al. In situ X-ray powder diffraction study of the one-dimensional polymeric C60 phase transformation under high-pressure. Chem. Phys. Lett., 2007, 438, P. 63–66.
23. Meletov K.P., Davydov V.A., et al. The influence of pressure on the photopolymerization rate of linear orthorhombic polymer of C60. Chem. Phys. Lett., 2006, 428, P. 298–302.
Review
For citations:
Meletov K.P., Arvanitidis J., Christofilos D., Kourouklis G. Pressure-assisted photopolymerization in the molecular donor-acceptor fullerene complex {Cd(dedtc)2}2C60. Nanosystems: Physics, Chemistry, Mathematics. 2016;7(1):133-139. https://doi.org/10.17586/2220-8054-2016-7-1-133-139
Views:
17
Email this article 