Coherent molecular vibrational dynamics of CH<sub>2</sub>
 stretching modes in polyethylene studied by femtosecond-CARS

Kozai, T.; Kayano, Yuya; Aoi, Takahito; Tsurumachi, Noriaki; Nakanishi, Shunsuke

doi:10.1002/jrs.4663

Cited by 3 publications

(3 citation statements)

References 23 publications

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“…investigated the coherent molecular vibrational dynamics of CH 2 stretching modes in polyethylene by femtosecond‐CARS. They were able to conclude that the coherent vibrational relaxation of symmetric CH 2 stretching modes at room temperature consists of the contribution of lifetime and approximately 1.5 times larger contribution of pure dephasing . Marrocco presented closed‐form solutions of CARS signals generated by means of time asymmetric probe pulses.…”

Section: Non‐linear Coherent and Time‐resolved Raman Spectroscopymentioning

confidence: 99%

“…They were able to conclude that the coherent vibrational relaxation of symmetric CH 2 stretching modes at room temperature consists of the contribution of lifetime and approximately 1.5 times larger contribution of pure dephasing. [79] Marrocco presented closed-form solutions of CARS signals generated by means of time asymmetric probe pulses. As a result of this achievement, CARS lineshapes and time decays of Raman resonances can be studied without the numerical efforts that are common in the conventional approach to time-resolved CARS.…”

Section: Coherent Anti-stokes Raman Spectroscopymentioning

confidence: 99%

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Recent advances in linear and non‐linear Raman spectroscopy. Part X

Nafie

2016

J Raman Spectroscopy

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This review, published annually, provides an overview of advances in the field of Raman spectroscopy as found in papers published in the preceding calendar year in the Journal of Raman Spectroscopy (JRS), as well as in trends over the past decade across journals that have published papers important to the field of Raman spectroscopy. This information is obtained from statistical data on article counts obtained from Thomson Reuters ISI Web of Science Core Collection by year and by subfield of Raman spectroscopy. Additional information is gleaned from presentations at the XXV International Conference on Raman Spectroscopy (ICORS 2016) in Forteleza, Brazil in August 2016 and those featuring Raman scattering at SCIX 2016 organized by the Federation of Analytical Chemistry and Spectroscopy Societies (FACSS) in Minneapolis, Minnesota, USA in September 2016. Coverage is also provided for topics from the conference ECONOS 2016 held in April in Göteborg, Sweden and GeoRaman 2016 in June in Novosibirsk, Russia. Finally, papers published in JRS in 2015 are highlighted and arragned by topics at the frontier of Raman spectroscopy. From these various perspectives, it is clear that Raman spectroscopy continues to be a rapidly expanding field that provides sensitive photonic information of matter at the molecular level in an ever‐widening arena of novel applications. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Non‐linear Coherent and Time‐resolved Raman Spectroscopymentioning

confidence: 99%

Section: Coherent Anti-stokes Raman Spectroscopymentioning

confidence: 99%

Recent advances in linear and non‐linear Raman spectroscopy. Part X

Nafie

2016

J Raman Spectroscopy

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“…It allows the direct observation of the distribution of molecules in vibrational excited states and precise measurement of the rotation and vibrational packing density of molecules in space and time. It has a wide range of applications in photochemical dynamics, molecular relaxation, and fluid dynamics [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Relaxation behavior of vibrationally excited N₂(X¹Σ_g ⁺ v″ = 6) collisions with H₂

Mamatimin,

Liu,

Habibulla

et al. 2023

J. Phys. B: At. Mol. Opt. Phys.

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Relaxation behavior of vibrationally excited N2 (X1Σg+ v′′ = 6) induced by collisions with H2 has been investigated using coherent anti-Stokes Raman spectroscopy (CARS). The total pressure of the N2-H2 mixture was 500 Torr, and the molar ratios of H2 were 0.3, 0.4, 0.5, 0.6 and 0.8, respectively. The v′′ = 6 vibrational state of the electronic ground-state manifold X1Σg+ of N2 was selectively excited by overtone pumping, and the evolution of the population was monitored using CARS spectroscopy. The collisional deactivation rate coefficients of the excited state N2 (v′′ = 6) with H2 and N2 are approximately 2.59×10-14cm3s-1 and 1.04×10-14 cm3s-1 at300 K, and 2.57 ×10-14 cm3s-1 and 0.54 ×10-14 cm3s-1 at320 K, respectively. The relaxation rate coefficient of the N2-H2 collision was approximately 2.5 and 5 times that of the self-relaxation rate coefficient. The experimental results show that the population densities of the (1,2), (2,2), (3,5), and (3,6) levels of H2 have a maximum at 320 K, while the population densities of (2,3) and (2,4) show little change with increasing temperature. Simultaneously, the time-resolved CARS profiles of the vibrational levels v = 6,5,4 by preparing v = 6 of N2 also indicated that a near-resonant multi-quantum relaxation process occurred between N2-H2. The collision-induced population transfer of H2 was observed at molar ratios of 0.3, 0.4, 0.5, 0.6 and 0.8, respectively. The vibrational population distribution of H2 molecules after collision with N2 molecules is given by the CARS signal intensity ratio, and the population of hydrogen molecules at v = 2,3 vibrational states also provides strong experimental evidence for energy near-resonance collisions between N2-H2.

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Ultrafast Coherent Anti-Stokes Raman spectroscopic studies of nitro/nitrogen rich aryl-tetrazole derivatives

Katturi

Kommu

et al. 2020

Chemical Physics Letters

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Coherent molecular vibrational dynamics of CH₂ stretching modes in polyethylene studied by femtosecond-CARS

Cited by 3 publications

References 23 publications

Recent advances in linear and non‐linear Raman spectroscopy. Part X

Recent advances in linear and non‐linear Raman spectroscopy. Part X

Relaxation behavior of vibrationally excited N₂(X¹Σ_g ⁺ v″ = 6) collisions with H₂

Ultrafast Coherent Anti-Stokes Raman spectroscopic studies of nitro/nitrogen rich aryl-tetrazole derivatives

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Coherent molecular vibrational dynamics of CH2 stretching modes in polyethylene studied by femtosecond-CARS

Cited by 3 publications

References 23 publications

Recent advances in linear and non‐linear Raman spectroscopy. Part X

Recent advances in linear and non‐linear Raman spectroscopy. Part X

Relaxation behavior of vibrationally excited N2(X1Σg + v″ = 6) collisions with H2

Ultrafast Coherent Anti-Stokes Raman spectroscopic studies of nitro/nitrogen rich aryl-tetrazole derivatives

Contact Info

Product

Resources

About

Coherent molecular vibrational dynamics of CH₂ stretching modes in polyethylene studied by femtosecond-CARS

Relaxation behavior of vibrationally excited N₂(X¹Σ_g ⁺ v″ = 6) collisions with H₂