Vibrational spectroscopy of nitroaromatic self-assembled monolayers under extreme conditions

Yuanxi Fu, Elizabeth A. Friedman, Kathryn E. Brown, Dana D. Dlott

Research output: Contribution to journalArticlepeer-review

Abstract

Vibrational spectra up to 8 GPa and 600 °C were obtained for self-assembled monolayers (SAMs) on noble metal surfaces of the energetic material simulant 4-nitrobenzenethiol (NBT). The high-pressure measurements used a surface-enhanced Raman sensor. The high-temperature measurements used femtosecond laser flash-heating and nonlinear coherent vibrational spectroscopy. The SAM nitro stretching transition νNO2s is insensitive to flash-heating where there is no time for chemical reactivity or thermal expansion. A large pressure broadening in νNO2s of the SAM but not in solid NBT was associated with surface adlayer rearrangement. The implications for time-resolved measurements of shock-compressed energetic materials are discussed.

Original languageEnglish (US)
Pages (from-to)369-374
Number of pages6
JournalChemical Physics Letters
Volume501
Issue number4-6
DOIs
StatePublished - Jan 7 2011

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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