Investigation of interaction of carbon dioxide with aerogels nanopores

The absorption spectrum of 2 0 0 12 – 0 0 0 01 band of carbon dioxide, confined in 20 nm nanopores of silica aerogel, was measured with help of a Bruker IFS 125 HR Fourier transform spectrometer at room temperature and a spectral resolution of 0.01 cm-1. The obtained dependence of spectral line half-width values on rotational quantum numbers was studied and compared with data available in the literature. © (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only

Parameters of broadening of water molecule absorption lines by argon derived using different line profile models

The water vapor absorption spectrum was measured in the spectral region 6700–7650 cm–1 with argon as a buffer gas. The room-temperature spectrum was measured using a Bruker IFS 125-HR Fourier Transform Spectrometer with high signal-to-noise ratio, with a spectral resolution of 0.01 cm–1, at argon pressures from 0 to 0.9 atm. The H2O absorption spectral line parameters are derived by fitting two line shape profiles (Voigt and speed-dependent Voigt) to the experimental spectrum. It is shown that the use of speed-dependent Voigt profile provides the best agreement with experimental data

Modification of the experimental setup of the FTIR spectrometer and thirty-meter optical cell for measurements of weak selective and nonselective absorptions

The improvement of the experimental setup based on a Fourier spectrometer Bruker IFS-125 and a 30-meter multipass optical cell is described. The improvement includes the cell equipment with a system of automated adjustment of the number of beam passes without cell depressurization and ensures the cell work at high temperatures

High-resolution molecular spectroscopy in Tomsk: establishment, development, and current status

The paper presents brief information about the establishment and development in Tomsk of high-resolution molecular spectroscopy – the field of science closely related to a study of the optical properties of the atmosphere. The methods and the current state of high-resolution laser spectroscopy and Fourier spectroscopy are described together with new results of mass measurements. The developed theoretical methods for a study of molecular spectra, including methods of their global analysis and information systems of spectral databases, are presented

High-resolution molecular spectroscopy in Tomsk: establishment, development, and current status

The paper presents brief information about the establishment and development in Tomsk of high-resolution molecular spectroscopy – the field of science closely related to a study of the optical properties of the atmosphere. The methods and the current state of high-resolution laser spectroscopy and Fourier spectroscopy are described together with new results of mass measurements. The developed theoretical methods for a study of molecular spectra, including methods of their global analysis and information systems of spectral databases, are presented

Influence of aerogel texture on spectral line parameters of CO confined inside aerogel pores

The influence of sintering of an aerogel sample on spectral line parameters of carbon monoxide confined inside aerogel pores is studied for the first time. The measurements were carried out in the 4000–4400 cm–1 spectral range using the Bruker IFS 125HR spectrometer. It is shown that the sintering increased CO halfwidths but did not affect rotational dependences of CO lines

Spectroscopic nanoporometry of aerogel

The sizes of aerogel nanopores from the measured broadening of rotational-vibrational CO lines caused by collisions with nanopore walls have been determined. It has been shown that the sizes of nanopores with a diameter of 15–25 nm can be reliably assessed from the half-widths of spectral lines measured on a high-resolution Fourier spectrometer and agree well with the experimental data found from the low-temperature adsorption of nitrogen