In situ and real-time vibrational spectroscopic characterizations of the photodegradation of nitrite in the presence of methanediol

Article Chemistry, Physical

Infrared Characterization of Isotopic Analogues of Methanediol in Aqueous Solution

Yi-Fang Chen et al.

Summary: This study provides suitable detection windows for atmospheric and aerosol reactions in laboratory studies by characterizing the infrared spectra of isotopic analogues of methanediols.

JOURNAL OF PHYSICAL CHEMISTRY A (2022)

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Article Chemistry, Multidisciplinary

Rapid preparation of gaseous methanediol (CH2(OH)2)

Yi-Fang Chen et al.

Summary: The simplest geminal diol CH2(OH)(2) is a crucial precursor for atmospheric formic acid formation. CH2(OH)(2) vapor can be generated by evaporating an aqueous formaldehyde solution prepared by dissolving paraformaldehyde under reflux. The rovibrational feature of CH2(OH)(2) at 980-1100 cm(-1) is consistent with simulations and is not affected by interfering H2O and CH2O.

CHEMICAL COMMUNICATIONS (2022)

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Article Geosciences, Multidisciplinary

Raman and infrared spectroscopic quantification of the carbonate concentration in K2CO3 aqueous solutions with water as an internal standard

Yunlu Ma et al.

Summary: Carbonate-bearing fluids are commonly found in various geological settings and are crucial in transporting elements like rare earth elements. Spectroscopic methods such as Raman spectroscopy and infrared spectroscopy show promise in quantifying carbonate concentrations in fluid inclusions, despite technical challenges. Calibration experiments using Raman and infrared spectra can potentially provide accurate quantification of carbonate concentrations and reveal the influence of K2CO3 concentration on the physical and chemical properties of the fluids.

GEOSCIENCE FRONTIERS (2021)

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Article Multidisciplinary Sciences

Ubiquitous atmospheric production of organic acids mediated by cloud droplets

B. Franco et al.

Summary: The oxidation of hydrated formaldehyde in cloud droplets is the dominant source of atmospheric formic acid, increasing atmospheric acidity. Through a multiphase pathway, formaldehyde can efficiently convert to gaseous formic acid, producing up to four times more formic acid than all other known chemical sources combined.

NATURE (2021)

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Editorial Material Multidisciplinary Sciences

How ant acid forms in the atmosphere

Joost de Gouw et al.

NATURE (2021)

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Article Chemistry, Physical

Gaseous infrared spectra of the simplest geminal diol CH2(OH)2 and the isotopic analogues in the hydration of formaldehyde

Hung-Yang Jian et al.

Summary: The study successfully probed the infrared spectrum of the simplest geminal diol, methanediol, in the gaseous hydration of formaldehyde. The experimental results agreed with the predicted vibrational wavenumbers and rotational parameters, confirming the accuracy of the calculations. The successful characterization of gaseous methanediol opens up possibilities for investigating chemical reactions of geminal diols in various fields.

PHYSICAL CHEMISTRY CHEMICAL PHYSICS (2021)

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Article Engineering, Environmental