Journal ArticleDOI
Generalized Two-Dimensional Correlation Method Applicable to Infrared, Raman, and other Types of Spectroscopy:
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TLDR
In this paper, a two-dimensional correlation method for various types of spectroscopy, including IR and Raman spectrograms, is proposed, where an external perturbation is applied to a system while being monitored by an electromagnetic probe with the application of a correlation analysis to spectral intensity fluctuations induced by the perturbations.Abstract:
A two-dimensional (2D) correlation method generally applicable to various types of spectroscopy, including IR and Raman spectroscopy, is introduced In the proposed 2D correlation scheme, an external perturbation is applied to a system while being monitored by an electromagnetic probe With the application of a correlation analysis to spectral intensity fluctuations induced by the perturbation, new types of spectra defined by two independent spectral variable axes are obtained Such two-dimensional correlation spectra emphasize spectral features not readily observable in conventional one-dimensional spectra While a similar 2D correlation formalism has already been developed in the past for analysis of simple sinusoidally varying IR signals, the newly proposed formalism is designed to handle signals fluctuating as an arbitrary function of time, or any other physical variable This development makes the 2D correlation approach a universal spectroscopic tool, generally applicable to a very wide range of applications The basic property of 2D correlation spectra obtained by the new method is described first, and several spectral data sets are analyzed by the proposed scheme to demonstrate the utility of generalized 2D correlation spectra Potential applications of this 2D correlation approach are then exploredread more
Citations
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What vibrations tell us about proteins
Andreas Barth,Christian Zscherp +1 more
TL;DR: This review deals with current concepts of vibrational spectroscopy for the investigation of protein structure and function, namely the amide I vibration of the polypeptide backbone that is used for secondary-structure analysis and some of the general aspects also apply to RamanSpectroscopy.
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Lignocellulosic biomass pyrolysis mechanism: A state-of-the-art review
TL;DR: A broad review of the state-of-the-art biomass pyrolysis research can be found in this article, where three major components (cellulose, hemicellulose and lignin) are discussed in detail.
Journal ArticleDOI
Multidimensional femtosecond correlation spectroscopies of electronic and vibrational excitations.
TL;DR: A classical-oscillator description of these spectroscopies in terms of interacting quasiparticles (rather than transitions among global eigenstates) sets the stage for designing new pulse sequences and inverting the multidimensional signals to yield molecular structures.
Journal ArticleDOI
Generalized Two-Dimensional Correlation Spectroscopy
TL;DR: In this article, a generalized two-dimensional correlation spectroscopy (2D correlation spectrum) was proposed for the analysis of spectra collected during the crystallization of biodegradable polymer poly(3-hydroxybutyrate-co-3hydroxyhexanoate) to demonstrate the merits of this technique, such as enhancement of spectral resolution, detection of coordinated changes among spectral signals, and determination of relative directions and sequential order of intensity variations.
Journal ArticleDOI
Infrared spectroscopy of proteins and peptides in lipid bilayers
Lukas K. Tamm,Suren A. Tatulian +1 more
TL;DR: The application of infrared spectroscopy to the static and dynamic structure of proteins and peptides in lipid bilayers is reviewed and limitations of the technique with regard to the absolute determination of secondary structure and orientation are discussed.
References
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Book
Time Series: Data Analysis and Theory
TL;DR: This book will be most useful to applied mathematicians, communication engineers, signal processors, statisticians, and time series researchers, both applied and theoretical.
Journal ArticleDOI
Two‐dimensional spectroscopy. Application to nuclear magnetic resonance
TL;DR: In this article, the possibilities for the extension of spectroscopy to two dimensions are discussed, including the elucidation of energy level diagrams, the observation of multiple quantum transitions, and the recording of high-resolution spectra in inhomogenous magnetic fields.
Journal ArticleDOI
Two-Dimensional Infrared (2D IR) Spectroscopy: Theory and Applications
TL;DR: In this paper, a two-dimensional infrared (2D IR) spectroscopy was proposed for elucidating various chemical interactions among functional groups, which simplifies complex spectra consisting of many overlapped peaks and enhances spectral resolution by spreading peaks over the second dimension.
Journal ArticleDOI
Two-dimensional infrared spectroscopy
TL;DR: In this article, a two-dimensional infrared (2D IR) spectroscopy technique based on time-resolved IR spectrograms is introduced, where a system is excited by an external perturbation, which induces a dynamic fluctuation of the IR spectrum.