Continuing progress in the field of two-dimensional correlation spectroscopy (2D-COS): Part III. Versatile applications

Park, Yeonju; Jin, Sila; Noda, Isao; Jung, Young Mee

doi:10.1016/j.saa.2022.121636

Cited by 18 publications

(9 citation statements)

References 440 publications

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“…, not strictly decreasing) functions that are not easily analyzed visually. 2DCOS is a well-established method to analyze sets of spectra recorded under external perturbation (in this case time after addition of the activation mixture) in general, 39–42 and in the study of smart polymers in particular. 21,22 2DCOS results are usually displayed in the form of contour plots, that depict the real (synchronous, Φ ) and imaginary (asynchronous, Ψ ) parts of the complex correlation function.…”

Section: Resultsmentioning

confidence: 99%

“…Since 2DCOS uses a well-dened mathematical approach to get this information it is less susceptible to subjective interpretation as, e.g., plotting kinetic traces or difference spectra and can also deal with more complex response (e.g., not strictly decreasing) functions that are not easily analyzed visually. 2DCOS is a wellestablished method to analyze sets of spectra recorded under external perturbation (in this case time aer addition of the activation mixture) in general, [39][40][41][42] and in the study of smart polymers in particular. 21,22 2DCOS results are usually displayed in the form of contour plots, that depict the real (synchronous, F) and imaginary (asynchronous, J) parts of the complex correlation function.…”

Section: Quantication Of Molecular Changesmentioning

confidence: 99%

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Molecular in situ monitoring of the pH-triggered response in adaptive polymers by two-dimensional Raman micro-correlation-spectroscopy

et al. 2023

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Section: Resultsmentioning

confidence: 99%

Section: Quantication Of Molecular Changesmentioning

confidence: 99%

Molecular in situ monitoring of the pH-triggered response in adaptive polymers by two-dimensional Raman micro-correlation-spectroscopy

et al. 2023

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“…2D COS Analysis of FT-IR Spectroscopy Data. Twodimensional correlation analysis (2D COS) 28 of FT-IR spectroscopic results was applied to spectra registered during the O 2 methane oxidation process on a catalyst surface. For 2D COS analysis, OPUS software from Bruker Optics was used.…”

Section: ■ Introductionmentioning

confidence: 99%

Oxygen Splitting and Methane Oxidation over Fe-Mordenite: Insight by the Operando 2D COS UV–Vis–NIR–IR Approach

Tarach,

Sobalska,

Held

et al. 2024

J. Phys. Chem. C

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Activation of molecular oxygen and subsequent oxidation of methane over Fe sites in mordenite zeolites with different content of framework Al atoms were studied in the continuous regime at low temperatures. For this purpose, reactivity tests of methane oxidation by molecular oxygen over iron mordenite zeolites were combined with an operando 2D COS UV−vis−NIR−IR study to analyze the reaction pathway. The transmission spectra in the visible−NIR−IR range of investigated iron mordenites revealed the structural changes of Fe(II) after O 2 treatment and the formation of the spectral features typical for α-O stabilized on iron. Mass spectrometry analysis of gaseous products of the simultaneous interaction of methane and oxygen with iron mordenite revealed the formation of methanol, water, carbon monoxide, and carbon dioxide. Moreover, operando 2D COS UV−vis−NIR−IR also evidenced the presence of formaldehyde, formate, carbon dioxide, and carbon monoxide as products of subsequent methanol oxidation. The differences in the reaction pathway of methane oxidation over Fe-mordenite compared to Fe-ferrierite and Fe-*BEA catalysts reflect unique properties of mordenite topology providing isolated α-oxygens in individual mordenite pockets, although formed by splitting of molecular oxygen by two cooperating iron ions and the nature of adsorption sites in the mordenite matrix.

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“…Despite the advantages of IR spectroscopy, the investigation of complex samples, such as archaeological wood, is challenging owing to the superposition of the absorption signals corresponding to different components [ 41 , 42 ]. Two-dimensional correlation infrared (2D COS-IR) spectroscopy, which was proposed by Noda in 1986, has been widely used to analyse environmental samples, natural products, polymers, foods, proteins and peptides, solutions, mixtures, and complex traditional Chinese medicines [ 43 , 44 ]. In the field of wood, this technique has mainly been applied to wood identification and to evaluate biodegraded wood [ 41 , 44 , 45 , 46 ].…”

Section: Introductionmentioning

confidence: 99%

“…Two-dimensional correlation infrared (2D COS-IR) spectroscopy, which was proposed by Noda in 1986, has been widely used to analyse environmental samples, natural products, polymers, foods, proteins and peptides, solutions, mixtures, and complex traditional Chinese medicines [ 43 , 44 ]. In the field of wood, this technique has mainly been applied to wood identification and to evaluate biodegraded wood [ 41 , 44 , 45 , 46 ]. However, it has not been used to study archaeological wood from historical wooden buildings.…”

Section: Introductionmentioning

confidence: 99%

Influence of Natural Aging on the Moisture Sorption Behaviour of Wooden Structural Components

Han

Xi²,

Dai³

et al. 2023

Molecules

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A greater understanding of moisture sorption behaviour of aged wooden structural components, which has a close relationship with dimensional stability, is required to effectively evaluate and preserve historical artefacts. This study focused on the effects of aging on Baotou beam samples from a Chinese historical wooden building. An analysis of the sorption isotherms and hysteresis loops of a naturally aged, decayed sample (AOS), an aged sound sample (AIS), and a reference sample (RS), using classical sorption isotherm models revealed that the moisture sorption behaviour of samples from the same growth ring in a Baotou beam can differ significantly. AOS showed higher hygroscopicity than AIS, and both these samples were more hygroscopic than RS. Furthermore, the mono/multilayer moisture contents of AOS were always higher than those of AIS and RS. In addition, Fourier transform infrared, second-derivative infrared, and two-dimensional correlation infrared spectroscopy were used to investigate chemical changes in the samples. The relative hemicellulose and lignin contents of the samples changed significantly with wood aging. Furthermore, AOS exhibited the highest calcium oxalate content, which may be associated with fungal infections. Overall, these results provide valuable insights into the effects of aging on wood samples and the dimensional stability of timber structures, which could inform future research on methods for the preservation or restoration of aging timber structures.

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Continuing progress in the field of two-dimensional correlation spectroscopy (2D-COS): Part III. Versatile applications

Cited by 18 publications

References 440 publications

Molecular in situ monitoring of the pH-triggered response in adaptive polymers by two-dimensional Raman micro-correlation-spectroscopy

Molecular in situ monitoring of the pH-triggered response in adaptive polymers by two-dimensional Raman micro-correlation-spectroscopy

Oxygen Splitting and Methane Oxidation over Fe-Mordenite: Insight by the Operando 2D COS UV–Vis–NIR–IR Approach

Influence of Natural Aging on the Moisture Sorption Behaviour of Wooden Structural Components

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