Reversible pressure-induced polymerization of Fe(C5H5)2 doped C70 |
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| Affiliation: | 1. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China;2. Department of Physics, Umea University, S-901 87 Umea, Sweden;1. Department of Production Engineering and Metallurgy, University of Technology, Iraq;2. Applied Physics Science Department/Laser Branch, University of Technology, Iraq;3. Nanotechnology and Advanced Material Research Center, University of Technology, Iraq;4. Nano-Optoelectronics Research and Technology Laboratory, School of Physics, Universiti Sains Malaysia, 11800, Penang, Malaysia;1. Institute of Problems of Chemical Physics RAS, Chernogolovka, Russia;2. Institute of Solid State Physics RAS, Chernogolovka, Moscow Region, 142432, Russia;1. Częstochowa Jan Długosz University, Institute of Chemistry, Environmental Protection and Biotechnology, al. Armii Krajowej 13/15, 42200 Częstochowa, Poland;2. Ivan Franko Lviv National University, Department of Inorganic Chemistry, Kyryla i Mefodia 6 79005 Lviv, Ukraine;1. Institute of Physics, Jan Długosz University in Czȩstochowa, Ave. Armii Krajowej 13/15, 42-200, Czȩstochowa, Poland;2. Institute of Physics, Czȩstochowa University of Technology, Ave. Armii Krajowej 19, 42-200, Czȩstochowa, Poland;1. Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), Jilin Key Engineering Laboratory of New Energy Materials and Technologies, College of Physics, Jilin University, Changchun 130012, PR China;2. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, PR China;3. School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130012, PR China;4. State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, PR China;5. Key Laboratory of Eco-chemical Engineering, Ministry of Education, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, Qingdao University of Science and Technology, Qingdao 266042, PR China |
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| Abstract: | High pressure Raman, IR and X-ray diffraction (XRD) studies have been carried out on C70(Fe(C5H5)2)2 (hereafter, “C70(Fc)2”) sheets. Theoretical calculation is further used to analyze the Electron Localization Function (ELF) and charge transfer in the crystal and thus to understand the transformation of C70(Fc)2 under pressure. Our results show that even at room temperature dimeric phase and one dimensional (1D) polymer phase of C70 molecules can be formed at about 3 and 8 GPa, respectively. The polymerization is found to be reversible upon decompression and the reversibility is related to the pressure-tuned charge transfer, as well as the overridden steric repulsion of counter ions. According to the layered structure of the intercalated ferrocene molecules formed in the crystal, we suggest that ferrocene acts as not only a spacer to restrict the polymerization of C70 molecules within a layer, but also as charge reservoir to tune the polymerization process. This supplies a possible way for us to design the polymerization of fullerenes at suitable conditions. |
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