25 papers · ranked by Valyu relevance
N. Picqué, Theodor W. Hänsch
A laser frequency combs is a broad spectrum composed of equidistant narrow lines. Initially invented for frequency metrology, such combs enable new approaches to spectroscopy over broad spectral bandwidths, of particular relevance to molecules. With optical frequency combs, the performance of existing spectrometers…
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Optical spectroscopy is an important and widely used technique, for instance, to characterize new materials and to identify unknown compounds. Spectra are typically reported as a function of the wavelength of light, yet the information extracted from such spectra can be misleading. In contrast, spectra represented as a…
Mihail Lucian Pascu, Farid Chemat
Optics and optical spectroscopy are dynamic fields that are developing very fast nowadays, triggered by (i) the need to go deeper in the scientific approach to nature’s processes and phenomena, (ii) the evolution of applications in technological and industrial processes, art conservation, environment protection and…
Sergey K. Pirutin, Shunchao Jia, Alexander I. Yusipovich, Mikhail A. Shank + 3 more
'Mikhail A. Shank' 'Evgeniia Yu. Parshina' 'Andrey B. Rubin' 'Vasile Chiş'] The review briefly describes various types of infrared (IR) and Raman spectroscopy methods. At the beginning of the review, the basic concepts of biological methods of environmental monitoring, namely bioanalytical and biomonitoring methods…
Kazi Al-Amin, Md. Kawsar, Md. Tariqur Rahaman Bhuiyan Mamun, Md. Sahadat Hossain
FTIR is a very important analytical technique that is widely used for the detection and analysis of inorganic materials. It has a wide range of applications, from chemical composition analysis, structure identification, and phase identification to surface analysis of inorganic materials. Despite its broad effectiveness…
Laura A. Arévalo, Stephen A. O’Brien, Eneko Lopez, Gajendra Pratap Singh + 2 more
Vibrational spectroscopy techniques are widely used in analytical chemistry, physics and biology. The most prominent techniques are Raman and Fourier-transform infrared spectroscopy (FTIR). Combining both techniques delivers complementary information of the test sample. We present the design, construction, and…
Katarzyna Kaczmarek, Andrzej Leniart, Barbara Lapinska, Slawomira Skrzypek + 2 more
'Slawomira Skrzypek' 'Monika Lukomska-Szymanska' 'Grzegorz Chladek'] The presented work focuses on the application of spectroscopic methods, such as Infrared Spectroscopy (IR), Fourier Transform Infrared Spectroscopy (FT-IR), Raman spectroscopy, Ultraviolet and Visible Spectroscopy (UV-Vis), X-ray spectroscopy, and…
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Raman spectroscopy is an increasingly powerful and fast-growing analytical technique across diverse disciplines, from materials science and chemistry to biology and medicine, thanks to advances in Raman instrumentation and greatly supported by the flourishing of chemometrics and artificial intelligence (AI). However…
Sandra Brünken, Stephan Śchlemmer
In this short review we will highlight some of the recent advancements in the field of high-resolution laboratory spectroscopy that meet the needs dictated by the advent of highly sensitive and broadband telescopes like ALMA and SOFIA. Among these is the development of broadband techniques for the study of complex…
Ben Spaun, P. Bryan Changala, David Patterson, Bryce Bjork + 3 more
'Oliver H. Heckl' 'John M. Doyle' 'Jun Ye'] Abstract— Cavity-enhanced frequency comb spectroscopy for molecule detection in the mid-infrared powerfully combines high resolution, high sensitivity, and broad spectral coverage [1]–[3]. However, this technique, and essentially all spectroscopic methods, is limited in…
Zaijun Chen, Theodor W. Hänsch, N. Picqué
Mid-infrared high-resolution spectroscopy has proven an invaluable tool for the study of the structure and dynamics of molecules in the gas phase. The advent of frequency combs advances the frontiers of precise molecular spectroscopy. Here we demonstrate, in the important 3-µm spectral region of the fundamental CH…
K. Brzozowski, A. Pieczara, W. Korona, A. Nowakowska + 4 more
For the first time, we provide Tandem RAman Microscopy (TRAM), a cutting-edge multimodal microscope that integrates the methods of Stimulated Raman Scattering (SRS), Coherent anti-Stokes Raman Scattering (CARS), and spontaneous (resonance) Raman Scattering ((R)RS). The device facilitates sequential RS imaging to…
Andreas Schwaighofer, Bernhard Lendl
Infrared (IR) spectroscopy is a widely used technique for evaluation of protein secondary structure. In this chapter, we focus on the application of this analytical technique for analysis of inclusion bodies. After a general introduction to protein analysis by IR spectroscopy different approaches for spectra…
Julia Brüggemann, Mario Wolter, Christoph Jacob
Computational protocols for the simulation of two-dimensional infrared (2D IR) spectroscopy usually rely on vibrational exciton models, which require an empirical parametrization. Here, we present an efficient quantum-chemical protocol for predicting static 2D IR spectra that does not require any empirical parameters.…
Anna Lena Schäfer, Cristina Gellini, Rolf Diller, Katrina T. Forest + 2 more
Time-resolved resonance Raman spectroscopy with continuous-wave excitation is a fundamental technique that has contributed substantially to the understanding of structure and dynamics of bacteriorhodopsin and related retinal proteins. However, the underlying principles were developed about fifty years ago for…
Kana Iwakuni, Thinh Bui, Justin Niedermeyer, Takashi Sukegawa + 1 more
'Jun Ye'] We have developed a dispersive spectrometer using a compact immersion grating for direct frequency comb spectroscopy in the long-wave infrared region of 8-10 m. A frequency resolution of 463 MHz is achieved, which is the highest reported in this wavelength region with a dispersive direct frequency comb…
Åke Andersson, Vitali Zhaunerchyk
Proteins are vital biological molecules found in every living organism, and their function is determined by what shape they fold into. Peptides are essentially subsets of proteins, and therefore ideal as model systems for protein folding. The structure of a molecule is closely related to its vibrational absorption…
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The chemical shift range of many NMR-active isotopes cannot be excited in a single experiment by classical hard pulse high resolution spectroscopy. Such nuclei can be addressed by specifically optimized saturation pulses, which are derived from linear frequency sweeps that are further optimized using methods derived…
D. Dhankhar, A. Nagpal, R. Li, J. Chen + 2 more
The resonance Raman spectra of bacterial carotenoids have been employed to identify bacterial strains and their intensity changes as a function of ultraviolet(UV) radiation dose have been used to differentiate between live and dead bacteria. The enhanced resonance Raman spectra of color-pigmented bacteria were recorded…
Liangyi Chen, Zifan Ma, Joseph Fournier
Ultrafast transient vibrational action spectra of cryogenically cooled Re(CO)3(CH3CN)3+ ions are presented. Nonlinear spectra were collected in the time domain by monitoring the photodissociation of a weakly-bound N2 messenger tag as a function of delay times and phases between a set of three infrared pulses.…
Christopher P. Harrilal, Sandilya V.B. Garimella, Randolph V. Norheim, Yehia M. Ibrahim
The ability to uniquely identify a compound requires highly precise and orthogonal measurements. Here we describe a newly developed analytical platform that uniquely integrates high resolution ion mobility and cryogenic vibrational ion spectros-copy for high-precision structural characterizations. This platform allows…
Josefine H. Andersen, Sonia Coriani, Christof Hättig
Coupled-cluster response theory offers a path to high-accuracy calculations of spectroscopic properties, such as magnetic circular dichroism (MCD). However, divergence or slow convergence issues or are often encountered for electronic transitions in high-energy regions with a high density of states. This is here…
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S-Adenosyl methionine (SAM) is a biomolecule containing an adenosyl cation bonded to the sulfur atom of methionine (Met). SAM is a primary methyl donor and the precursor of the Gluthatione (GSH). Due to the role played by SAM in the proper functioning of cellular metabolism, it is an interesting biomolecule to be…
Juan Pablo Fuenzalida Werner, Yuanhui Huang, Kanuj Mishra, Andriy Chmyrov + 2 more
Despite the tremendous technological advances in detection and data analysis in optoacoustic (OA) imaging, there is no detailed knowledge and understanding of the photophysics of OA signal generation of commonly used contrast agents, such as dyes and chromoproteins. This gap blocks the further development of dedicated…
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The ability to precisely measure photopolymerization kinetics is paramount to controlling curing characteristics and material properties in photocurable systems. However, traditional methods to measure kinetics, such as Fourier- transform infrared spectroscopy (FTIR), are often limited by broadening mechanisms…