Intramolecular Vibrational Energy Relaxation of CO in Cross-Linked Poly(ethylene glycol) Diacrylate-Based Ion Gels.

Ultrafast two-dimensional infrared spectroscopy (2D-IR) and Fourier transform infrared spectroscopy (FTIR) were used to measure carbon dioxide (CO) in 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([emim][TfN]), cross-linked low-molecular-weight poly(ethylene glycol) diacrylate (PEGDA), and an ion gel composed of a 50 vol % blend of the two. The center frequency of the antisymmetric stretch, ν, of CO shifts monotonically to lower wavenumbers with increasing polymer content, with the largest line width in the ion gel (6 cm). Increasing polymer content slows both spectral diffusion and vibrational energy relaxation (VER) rates.

New Emerging Modalities to Treat Post-Thoracotomy Pain Syndrome: A Review.

Pain relief during and after thoracic surgery continues to be a challenging issue for anesthesiologists caring for these patients. A comprehensive approach to pain management, combined with newer approaches to peripheral nerve blockade, may improve perioperative patient care and lessen the significant risk of the post thoracotomy pain syndrome.