2D-IR spectroscopy: an additional dimension to investigate ultrafast structural dynamics

Year: 2013

Authors: Lima M., Candelaresi M., Foggi P.

Autors Affiliation: European Laboratory for Non-linear Spectroscopy (LENS), Sesto Fiorentino, Italy; CNR-INO, Polo Scientifico Universitario, Sesto Fiorentino, Italy; Adrok Ltd. 49-1 West Bowling Green Street Edinburgh, Scotland; Department of Chemistry, University of Perugia, Italy

Abstract: We describe the theory, some experimental details and the data analysis procedures of two-dimensional infrared (2D-IR) spectroscopy. A brief description of an application of the technique to the study of a dipeptide in solution is also reported. Like multi-dimensional NMR spectroscopy, 2D-IR can provide additional pieces of information hidden in the inhomogenously broadened bands observed in linear IR spectra. In addition, the presence of off-diagonal peaks allows a direct estimate of the couplings between vibrational modes. By means of this technique, making use of ultrashort mid-infrared pulses, exploration of the structure and of the dynamics of molecular systems in the condensed phase and on very short time scales becomes now achievable. The effects of solvent dynamics on Glycine-L-Alanine-Methylamide by 2D-IR are discussed. Copyright (c) 2013 John Wiley & Sons, Ltd.


Volume: 44 (10)      Pages from: 1470  to: 1477

More Information: This article is dedicated to the memory of Robin M. Hochstrasser, the pioneer of multi-dimensional infrared spectroscopy. The authors acknowledge the Italian \”Ministero dell\’Istruzione, dell\’Universita e della Ricerca\” (PRIN 2008 2008BFJ34R and FIRB RBFR10Y5VW) and the \”Ente Cassa di Risparmio di Firenze\” for their financial support. The authors wish to thank the referees for their constructive suggestions and criticisms.
KeyWords: peptides; two-dimensional IR; vibrational spectroscopy
DOI: 10.1002/jrs.4311

Citations: 10
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