Infrared and Raman spectra of the trimethylsilyl ester of the cubic octameric silicate, (Si8O20)[Si(CH3)3]8, at very high pressures |
| |
| Institution: | 1. College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, PR China;2. Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, PR China;3. Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, PR China;4. Department of Chemistry, Capital Normal University, Beijing 100048, PR China;5. Analytical Instrumentation Center, Peking University, Beijing 100871, PR China;6. School of Instrumentation Science and Opto-Electronics Engineering, Precision Opto-Mechatronics Technology Key Laboratory of Education Ministry, Beihang University, Beijing 100191, PR China;7. Institute of Environmental Assessment and Water Research (IDAEA), Spanish Council of Scientific Research (CSIC), Barcelona 08034, Spain;8. Department of Engineering Science, Osaka Electro-Communication University, Osaka, Japan;9. Department of Materials Science and Engineering, University of Delaware, Newark, DE 19716, United States;10. Department of Chemistry, School of Science and Engineering, Kwansei Gakuin University, Sanda, Hyogo 669-1337, Japan;1. Institut für Materialwissenschaft, Technische Universität Darmstadt, Otto-Berndt-Straße 3, Darmstadt D-64287, Germany;2. College of Materials, Key Laboratory of High Performance Ceramic Fibers, Ministry of Education, Xiamen University, Xiamen 361005, China;3. EnBW Energie Baden-Württemberg AG, Durlacher Allee 93, Karlsruhe 76131, Germany;4. College of Materials, Fujian Key Laboratory of Advanced Materials, Xiamen University, Xiamen 361005, China;1. Coal Geology and Organic Petrology Lab., Department of Applied Geology, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, India;2. Coal Petrology Section, Resource Quality Assessment Division, CSIR-Central Institute of Mining and Fuel Research, Digwadih Campus, Dhanbad, India |
| |
| Abstract: | Infrared and FT-Raman spectra have been recorded, at ambient temperature, for the solid trimethylsilyl ester of the cubic octameric silicate, (Si8O20)SiCH3)3]8 (Q8M8), at various pressures up to ∼50 kbar with the aid of a diamond-anvil cell. The vibrational spectroscopic data indicate that there is pressure-induced structural change occurring at ∼20 kbar. Moreover, the central Si8O20 framework (D4h symmetry) is remarkably resistant to applied pressure, as are other high-symmetry systems (e.g., C60, Ih symmetry), while the trimethylsilyl side-chains are more easily compressed. The pressure sensitivity (dν/dp), 1.35 cm−1/kbar, of the ν(C–H) mode of the trimethylsilyl groups in the low-pressure phase is by far the greatest. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
