Affordable Access

Visible and UV coherent Raman spectroscopy of dipicolinic acid.

Authors
  • Pestov, Dmitry
  • Zhi, Miaochan
  • Sariyanni, Zoe-Elizabeth
  • Kalugin, Nikolai G
  • Kolomenskii, Alexandre A
  • Murawski, Robert
  • Paulus, Gerhard G
  • Sautenkov, Vladimir A
  • Schuessler, Hans
  • Sokolov, Alexei V
  • Welch, George R
  • Rostovtsev, Yuri V
  • Siebert, Torsten
  • Akimov, Denis A
  • Graefe, Stefanie
  • Kiefer, Wolfgang
  • Scully, Marlan O
Type
Published Article
Journal
Proceedings of the National Academy of Sciences
Publisher
Proceedings of the National Academy of Sciences
Publication Date
Oct 18, 2005
Volume
102
Issue
42
Pages
14976–14981
Identifiers
PMID: 16217021
Source
Medline
License
Unknown

Abstract

We use time-resolved coherent Raman spectroscopy to obtain molecule-specific signals from dipicolinic acid (DPA), which is a marker molecule for bacterial spores. We use femtosecond laser pulses in both visible and UV spectral regions and compare experimental results with theoretical predictions. By exciting vibrational coherence on more than one mode simultaneously, we observe a quantum beat signal that can be used to extract the parameters of molecular motion in DPA. The signal is enhanced when an UV probe pulse is used, because its frequency is near-resonant to the first excited electronic state of the molecule. The capability for unambiguous identification of DPA molecules will lead to a technique for real-time detection of spores.

Report this publication

Statistics

Seen <100 times