Spectroscopic analysis of asymmetric top free radicals

Liu, Yuyan; Liu, Xiaoyong; Liu, Hongping; Yuanqing, Guo; Lin, Jun; Gao, Hongjun; Duan, Chuanxi

doi:10.1007/bf02879730

Cited by 10 publications

(5 citation statements)

References 20 publications

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“…This result agrees well with experimental observations. 27 In our previous paper, [20][21][22][23] we have obtained the same results as Duran and Fujimoto. 25,26 In this work, we have performed gas-phase ion-molelcule reactions of C 60 with the fragments derived from the self-CI of methyl acrylate and studied the structures and stabilities of the adducts of the…”

Section: Introductionsupporting

confidence: 67%

“…Our results show that C 60 possesses not only electrophilic but also nucleophilic reactivity under special conditions. [20][21][22][23] Therefore, investigations of the reactivity of fullerenes in the gas-phase should lead to an improved understanding of reactivity in the condensed-phase. By theoretical studies of C 60 adducts, Duran et al and Fujimoto et al thoroughly studied the reactivity of the 6-6 bond of C 60 (the C-C bond shared by two sixmembered rings) and the 6-5 bond of C 60 (the C-C bond shared by a five-membered ring and a six-membered ring) using the AM1 semi-empirical and ab initio methods, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Gas-Phase Ion—molecule Reactions of C₆₀ with the Plasma of Methyl Acrylate

Liu

Guo

et al. 2001

Eur J Mass Spectrom (Chichester)

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The gas-phase ion-molecule reactions of C 60 with the plasma generated from methyl acrylate under self-chemical ionization conditions were studied by use of a triple-quadrupole mass spectrometer. The adduct cation [C 60 C 3 H 3 O] + and protonated molecular ion [C 60 H] + were observed as the major product ions. The former adduct ion is formed by electrophilic reaction of C 60 with the ion [CH 2 =CHCO] + , a main fragment ion resulting from the methyl acrylate molecular ion [CH 2 =CHCOOCH 3 ] + through alpha cleavage. The latter ion is generated by proton transfer from protonated methyl acrylate to C 60. Semi-empirical quantum chemical calculations have been performed for the eight possible isomers of [C 60 C 3 H 3 O] + at the Hartree-Fock level by use of the AM1 method. The results show three types of cycloadducts as the most stable structures among the possible isomers.

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Section: Introductionsupporting

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Gas-Phase Ion—molecule Reactions of C₆₀ with the Plasma of Methyl Acrylate

Liu

Guo

et al. 2001

Eur J Mass Spectrom (Chichester)

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“…This method is changed from the carrier roller loading branch conveyor belt according to certain proportion or all to unidirectional carried roller, and placed the damping plate beyond the lower conveyor belt [2]. When the conveyor belt falling for broken down or conveyor reverse, because of the roller irreversible, the loading branch conveyor belt reduces the speed to braking using sliding friction resistance between of the roller and the bearing of branch conveyor belt.…”

Section: Flexible Friction Braking Methodsmentioning

confidence: 99%

Research Status of Broken Belt Protector in Belt Conveyor

Liu

Wang

et al. 2013

AMR

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A belt conveyor is a kind of major equipment to carry loose materiel and is widely used in industries such as mine port, metallurgy, etc. for its numerous advantages. But Because of the influence of belt itself and outside factor, the accident that the belt is cut off often appears, which make a grate threat for safe production. Gives detail introduction to several types of broken belt protectors used in home, analyzes its working principle and advantages and disadvantages, provide certain reference for the user choice.

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“…The σ values were determined to be 148 ± 4 MHz in this study, which are favorably compared with those in the X2 A 1 state. [11][12][13][14][15][16][17][18][19][20] The vibrationally excited states in the X2 A 1 state have almost the same σ values with the vibrationless state; 13,16 therefore, we could not obtain the distinction between the cold and hot bands, when we checked only the determined σ values.…”

Section: B Determination Of the Hyperfine Interaction Constantsmentioning

confidence: 99%

Hyperfine interaction constants of 14NO2 in 14 500–16 800 cm−1 energy region

Tada

Hirata

Kasahara

2017

The Journal of Chemical Physics

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We observed hyperfine-resolved high-resolution fluorescence excitation spectra of k = 0, N = 1 ← 0 transitions in 82 vibronic bands of the ÃB ← X̃A system of NO in the 14 500-16 800 cm region by crossing a jet-cooled molecular beam and a single-mode dye laser beam at right angles. We determined hyperfine interaction constants of the lower and upper states for all the observed vibronic bands based on the analysis of the hyperfine structures of k = 0, N = 1 ← 0 transitions. Most of the determined Fermi contact interaction constants were found to be distributed in 0.0013-0.0038 cm, which are intermediate in magnitude between those in lower and higher energy region reported by other groups. A sharp decreasing of the Fermi contact interaction constant was found in 16 200-16 600 cm, and it may be caused by the interaction with the dark C̃A state. The hyperfine interaction constants are powerful clues to obtain reliable vibronic assignment. We tentatively assigned vibronic bands located at 14 836 cm, 15 586 cm, and 16 322 cm as the transitions to the intrinsic (0,7,0), (0,8,0), and (0,9,0) vibrational levels of the ÃB state, respectively.

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Spectroscopic analysis of asymmetric top free radicals

Cited by 10 publications

References 20 publications

Gas-Phase Ion—molecule Reactions of C₆₀ with the Plasma of Methyl Acrylate

Gas-Phase Ion—molecule Reactions of C₆₀ with the Plasma of Methyl Acrylate

Research Status of Broken Belt Protector in Belt Conveyor

Hyperfine interaction constants of 14NO2 in 14 500–16 800 cm−1 energy region

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Spectroscopic analysis of asymmetric top free radicals

Cited by 10 publications

References 20 publications

Gas-Phase Ion—molecule Reactions of C60 with the Plasma of Methyl Acrylate

Gas-Phase Ion—molecule Reactions of C60 with the Plasma of Methyl Acrylate

Research Status of Broken Belt Protector in Belt Conveyor

Hyperfine interaction constants of 14NO2 in 14 500–16 800 cm−1 energy region

Contact Info

Product

Resources

About

Gas-Phase Ion—molecule Reactions of C₆₀ with the Plasma of Methyl Acrylate

Gas-Phase Ion—molecule Reactions of C₆₀ with the Plasma of Methyl Acrylate