Raman and surface-enhanced Raman scattering of a series of size-separated polyynes
作者： Hiroshi Tabata , Minoru Fujii , Shinji Hayashi , Tatsuya Doi , Tomonari Wakabayashi
DOI: 10.1016/J.CARBON.2006.07.004
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摘要: Abstract Solutions of hydrogen-capped polyynes were prepared by laser ablation graphite powder in n -hexane and subjected to size separation high-performance liquid chromatography. size-selected C H 2 ( = 8–16) investigated normal Raman (NR) surface-enhanced scattering (SERS) spectroscopy. A main band appearing the 2000–2200 cm −1 region NR spectra showed a systematic downward shift as chain length increased. The observed bands assigned Raman-active CC stretching vibrational modes comparison with calculations based on density functional theory. SERS very broad located at frequencies lower than bands. increasing was also for one This thus counterpart strong spectra. These results made it possible assign origins previously reported mixed polyyne solutions.
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