Methanol Spectroscopy from Microwave to Infrared — Fundamentals and Applications

Xu, Li‐Hong

doi:10.1007/978-94-010-0832-7_8

Cited by 4 publications

(1 citation statement)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By measuring the changes in the equivalent characteristic impedance of the parallel helical line, it is possible to monitor the deformation of underground rock and soil, thereby enabling the monitoring of geological disasters. According to transmission line theory 4 , the reflection coefficient at a position x from the load end on a transmission line with a total length of l is as shown in Figure 3.…”

Section: Structure Of Parallel Helical Transmission Linementioning

confidence: 99%

Analysis of parallel helix tension measurement based on frequency domain reflection method

Li,

Chen

et al. 2023

Fifth International Conference on Artificial Intelligence and Computer Science (AICS 2023)

View full text Add to dashboard Cite

Distributed measurement of underground rock and soil deformation is an important part of geological hazard monitoring. Using parallel helical transmission lines as sensors and combining frequency domain reflection (FDR) analysis enables continuous distributed measurement of larger deformation quantities. It is known that the characteristic impedance of the parallel helical transmission line increases with the increase of tensile force. Through FDR, the measurement and location of the tensile point can be determined. This paper explains the principle of FDR measurement of tensile deformation in parallel helical transmission lines. In response to practical application issues of FDR in parallel helical transmission lines, this paper analyzes the influence of sweep range, frequency, and number of sampling points on measurement results through experimental data. The paper also measures different incident signals under different circumstances, identifies and analyzes factors that may affect measurement results, and selects a better measurement scheme. The proposed method is used to simulate the actual use of parallel helical transmission lines and obtain actual measurement data, which is analyzed for better understanding.

show abstract

Section: Structure Of Parallel Helical Transmission Linementioning

confidence: 99%

Analysis of parallel helix tension measurement based on frequency domain reflection method

Li,

Chen

et al. 2023

Fifth International Conference on Artificial Intelligence and Computer Science (AICS 2023)

View full text Add to dashboard Cite

show abstract

Sub-Doppler RQ-branch spectra and ab initio dipole derivative calculation for the ν11 (au) CH2-wagging mode of 1,3-butadiene

Sun

Lees

et al. 2005

Journal of Molecular Structure

View full text Add to dashboard Cite

How Vibrational Notations Can Spoil Infrared Spectroscopy: A Case Study on Isolated Methanol

Dinu,

Oenen,

Schlagin

et al. 2024

ACS Phys. Chem Au

View full text Add to dashboard Cite

Unraveling methanol's infrared spectrum has challenged spectroscopists for a century, with numerous loose ends still to be explored. We engage in this exploration based on experiments of isolating single methanol molecules in solid argon and neon matrices. We report infrared spectra of methanol in its natural isotopic composition and with partial and full deuteration. These experiments are accompanied by calculating wavenumbers involving anharmonicity and mode-coupling based on the vibrational configuration interaction approach. This allows for an unambiguous assignment of all fundamentals and resonances in the mid-infrared spectrum. An increasing degree of deuteration lifts resonances and aids in assigning bands uniquely. It also becomes evident that different notations typically used in chemistry or physics to describe molecular vibration from spectroscopy fail to describe the spectra appropriately. We highlight the shortcomings and suggest a more elaborate analysis using Sankey diagrams to unambiguously identify spectral features. Consequently, we demystify debated resonances occurring from various stretches and deformations of the methyl group.

show abstract

Methanol Spectroscopy from Microwave to Infrared — Fundamentals and Applications

Cited by 4 publications

References 20 publications

Analysis of parallel helix tension measurement based on frequency domain reflection method

Analysis of parallel helix tension measurement based on frequency domain reflection method

Sub-Doppler RQ-branch spectra and ab initio dipole derivative calculation for the ν11 (au) CH2-wagging mode of 1,3-butadiene

How Vibrational Notations Can Spoil Infrared Spectroscopy: A Case Study on Isolated Methanol

Contact Info

Product

Resources

About