Article
Astronomy & Astrophysics
Jennifer B. Bergner, Mahesh Rajappan, Karin Oberg
Summary: This study characterizes the thermal desorption behavior of HCN in astrophysically relevant conditions and predicts the HCN sublimation fronts in protoplanetary disks. It finds that in H2O-dominated mixtures, the majority of HCN remains trapped in the ice until H2O crystallizes. The study also raises questions about the purity and mixing environment of HCN in astrophysical ices, and suggests that the James Webb Space Telescope may provide answers.
ASTROPHYSICAL JOURNAL
(2022)
Article
Biochemistry & Molecular Biology
Oriele Palumbo, Adriano Cimini, Francesco Trequattrini, Jean-Blaise Brubach, Pascale Roy, Annalisa Paolone
Summary: Understanding the intermolecular forces in ionic liquids is crucial for understanding their properties. This study investigated weaker hydrogen bonding in aprotic liquids by combining computational study and far-infrared spectroscopy on four imidazolium-based ILs with different anions. The results demonstrated that the ion pairs in these ILs exhibit moderate to weak hydrogen bonding with the anions, with specific absorption bands corresponding to hydrogen bond stretching observed in the far-infrared spectrum. Additionally, phase transitions as a function of temperature were detected, and the difference in energy between H-bonded and dispersion-governed configurations was evaluated from the infrared spectra analysis.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Chemistry, Physical
P. Soulard, B. Tremblay
Summary: The investigation of water molecule complexed with methylamine (CH3NH2) in solid neon was carried out using Fourier transform infrared spectroscopy from 80 to 600 cm(-1) for the first time. The experimental and theoretical results revealed the importance of hydrogen bonding between water and methylamine in the observed complexes.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Chemistry, Physical
P. Soulard, B. Tremblay
Summary: For the first time, the complexation of acrylonitrile molecule with water and its homodimer has been studied using Fourier transform infrared spectroscopy. Both experimental and theoretical approaches were used to identify the vibrational transitions and structures of the complexes.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Physical
Taija L. Fischer, Till Wagner, Hannes C. Gottschalk, Arman Nejad, Martin A. Suhm
Summary: The study reveals that the infrared intensity of a water molecule's lower frequency OH stretching fundamental is shared with a dark state when it is shifted to the 3500 cm(-1) range by the solvation of a carbonyl compound, regardless of substitution. Harmonic and anharmonic model calculations support its assignment to a combination of the water bending overtone and in-plane water libration.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Physical
Iker Leon, Raul Montero, Asier Longarte, Jose A. Fernandez
Summary: Laser spectroscopy in jets is a major method for obtaining structural data from molecular aggregates. Despite nearly 70 years of research, the assignment of mass-resolved IR spectrum of water dimer remains controversial.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Astronomy & Astrophysics
M. Symeonidis
Summary: This article investigates the far-IR/sub-mm emission linked to AGN-heated dust and addresses concerns raised over the S16 AGN SED. The findings suggest that the concerns raised about the S16 AGN SED are not justified.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Meteorology & Atmospheric Sciences
L. Warwick, H. Brindley, A. Di Roma, S. Fox, S. Havemann, J. Murray, H. Oetjen, H. C. Price, D. Schuttemeyer, L. Sgheri, D. A. Tiddeman
Summary: This study investigates the retrieval of mid and upper tropospheric water vapor concentrations using airborne observations of far-infrared radiances. The results show that utilizing far-infrared measurements improves water vapor retrievals compared to in situ measurements, especially in the mid-upper troposphere. The performance of mid-infrared radiances is much reduced, while the advantage of far-infrared measurements is maintained even when the spectral resolution is reduced.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2022)
Article
Astronomy & Astrophysics
A. M. Velasco, C. Lavin
Summary: We determined absorption oscillator strengths for rotational transitions of NO's C (2)?(0)-A S-2(+)(0) band in Venus' upper atmosphere. The molecular quantum defect orbital method and the Rydberg-valence interaction between C (2)?(v=0) and B(2)11 (v=7) states were considered. Deviations from normal intensity distribution of the rotational lines were found at J=5.5. The reported line f-values are new and may aid in interpreting data from the Venus Express spacecraft's Visible and Infrared Thermal Imaging Spectrometer instrument.
ASTROPHYSICAL JOURNAL
(2023)
Review
Environmental Sciences
Cynthia L. Combs, Steven D. Miller
Summary: This paper reviews 1630 papers, presentations, theses, and dissertations on the utility of low-light satellite data from VIIRS imager and DMSP-OLS series. It categorizes the applications of these data across various disciplines, highlighting the dominance of social science papers and the unique ability of low-light observations to observe human civilization at night. The paper also examines the differences between applications using natural vs. artificial light and the use of moonlight. The study discusses the future of low-light measurements, suggesting a growing interest in the nascent field of nocturnal earth system science enabled by these novel measurements.
Article
Optics
M. Toureille, A. O. Koroleva, S. N. Mikhailenko, O. Pirali, A. Campargue
Summary: The rotational spectrum of water vapor in natural isotopic abundance has been recorded and analyzed, revealing the contributions of six water isotopologues to the spectrum. The obtained line list provides valuable data for validating spectroscopic databases, showing overall good agreement but also significant deviations.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2022)
Article
Acoustics
Martin Snehota, Jaromir Vachutka, Ladislav Dolezal, Klara Balazova, Marketa Trneckova, Hana Kolarova
Summary: In this study, it was found that sonicated samples placed in sonication vessels in the far field are actually exposed to a near field pattern due to the interaction between ultrasound and the well of culture plates. The variability of local acoustic intensity can reach up to several hundreds of percent, and it is recommended to control this phenomenon in future studies.
Article
Spectroscopy
V. G. Tyuterev, A. Barbe, L. Manceron, B. Grouiez, S. A. Tashkun, J. Burgalat, M. Rotger
Summary: This study reports the observations and analyses of the high-resolution ozone spectra in the THz range using the Synchrotron light source of the SOLEIL CNRS equipment. New measurements and assignments for the v2 band were carried out, and accurate ab initio calculations of line intensities combined with empirically fitted line positions were used to create new linelists for theoretical modeling. The findings highlight significant deviations in new experimental spectra compared to available spectroscopic databases and the sensitivity of the region near 100 cm-1 to temperature conditions.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Review
Chemistry, Analytical
Yukihiro Ozaki
Summary: This article provides an overview of infrared (IR) spectroscopy, focusing on mid-infrared (MIR), near-infrared (NIR), and far-infrared (FIR) or terahertz (THz) spectroscopy. The principles, characteristics, advantages, and applications of these spectroscopic techniques are compared. Key topics discussed include hydrogen bond studies, applications of quantum chemical calculations, and imaging in relation to the three types of spectroscopy.
ANALYTICAL SCIENCES
(2021)
Article
Chemistry, Physical
Sai Lyu, Julia Wiktor, Alfredo Pasquarello
Summary: This study investigates the water dehydrogenation reaction at the BiVO4(010)-water interface, revealing the intermediate species and kinetic barrier involved in the reaction. Structural changes and electronic structure variations during the reaction process are also analyzed, providing insights into the mechanism of hole hopping and electron transfer at the interface.
