Infrared laser spectroscopy of jet-cooled carbon clusters

Hwang, H. J.; Orden, Alan Van; Tanaka, Keiichi; Kuo, E. W.; Heath, J. R.; Saykally, Richard J.

doi:10.1080/00268979300101611

Cited by 60 publications

(33 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…29 The thermal motion of carbon chains at moderate temperatures is primarily manifested in their low-frequency bending vibrations around the ground-state linear structure. 50,51 Any bending of a chain results in a decrease in the cross section, therefore the true time-averaged values must be below our calculated ones, and the difference would increase with increasing temperature. Since it has been established that the rigidity of neutral carbon chains undergoes periodic oscillations as a function of length, 68,69 it may seem that both features of the deviations from experiment pointed out above can be explained by vibrational dynamics.…”

Section: Is the Problem With Carbon Chains Of Dynamic Origin?mentioning

confidence: 93%

Mobilities of carbon cluster ions: Critical importance of the molecular attractive potential

Shvartsburg¹,

Schatz²,

Jarrold³

1998

The Journal of Chemical Physics

138

208

View full text Add to dashboard Cite

Mobilities in helium gas for isomers belonging to the major structural families of carbon clusters identified in drift tube studies ͑chains, monocyclic and bicyclic rings, graphite sheets, and fullerenes and their dimers͒ have been evaluated by trajectory calculations employing a realistic ion-He interaction potential. For all the species considered, the agreement between the measured and calculated mobilities at room temperature improves by at least a factor of 3 over that obtained with the widely used hard-sphere projection approximation. Furthermore, for a large representative sample of clusters belonging to all the above families, the results of trajectory calculations as a function of temperature over the range of 78-360 K are in a good agreement with the measured mobilities. This shows that the C-He pairwise potential is only weakly dependent on the structure and chemical bonding of a carbon cluster. Thus this study demonstrates the universal suitability of trajectory calculations for the accurate prediction of the gas phase mobilities for polyatomic ions with various shapes and sizes, and the uniform superiority of this method over the previously used approximations. In particular, the trajectory calculations for large (nϭ120-140) fullerenes show that these cages have near-spherical shapes found by theory, while the projection approximation would erroneously assign them as ''buckytubes.'' It also appears that the mobility may be substantially affected by the degree of charge localization on a specific atom in the cluster, especially at low temperatures.

show abstract

Section: Is the Problem With Carbon Chains Of Dynamic Origin?mentioning

confidence: 93%

Mobilities of carbon cluster ions: Critical importance of the molecular attractive potential

Shvartsburg¹,

Schatz²,

Jarrold³

1998

The Journal of Chemical Physics

138

208

View full text Add to dashboard Cite

show abstract

“…Bare carbon clusters, C n , have been extensively studied over the past decade using experiment [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] and theory. [19][20][21][22][23][24][25][26][27][28][29] The related carbon monohydrides, C n H, which play an important role in combustion 30 and interstellar chemistry, have received somewhat less attention.…”

Section: Introductionmentioning

confidence: 99%

Photoelectron spectra of the C2nH− (n=1–4) and C2nD− (n=1–3) anions

Taylor

Neumark

1998

The Journal of Chemical Physics

108

View full text Add to dashboard Cite

Articles you may be interested inTemperature-dependent Raman and ultraviolet photoelectron spectroscopy studies on phase transition behavior of VO2 films with M1 and M2 phases J. Appl. Phys. 115, 153501 (2014); 10.1063/1.4870868Ammonia cluster anions and their relationship to ammoniated (solvated) electrons: The photoelectron spectra of ( NH 3 ) n=41-1100 − Anion photoelectron spectra of the carbon monohydrides, C 2n H Ϫ for nϭ1 -4 and C 2n D Ϫ for nϭ1 -3, have been measured. The spectra were recorded at a wavelength of 266 nm ͑4.657 eV͒ and yield electron affinities for each species. The spectra are vibrationally resolved, and some of the vibrational modes in the neutral C 2n H͑D͒ radicals are assigned. In addition, photoelectron angular distributions allow one to distinguish between photodetachment transitions to the 2 ⌺ ϩ and 2 ⌸ states of the neutrals. The spectra confirm previous work showing that C 2 H and C 4 H have 2 ⌺ ϩ ground states, while C 6 H and C 8 H have 2 ⌸ ground states. In addition, we observe the low-lying 2 ⌸ or 2 ⌺ ϩ excited states for all four radicals. The photoelectron angular distributions also serve as a probe of vibronic coupling between the 2 ⌺ ϩ and 2 ⌸ states. These effects are particularly prominent in the C 2 H Ϫ and C 4 H Ϫ spectra.

show abstract

“…Frequency in the closely related chains (Hwang et al 1993, and C n references therein) and (Ohshima, Endo, & Ogata C n O 1995)Èan increase thought to arise from a second-order spin-orbit interaction between the 3&~ground state and other low-lying states, typically a 1&`state that originates from the same electronic conÐguration and a nearby 3% or 1* state (Lefebvre-Brion & Field 1986). A second-order interaction of similar strength probably exists in the silicon carbides here ; although no theoretical or experimental information is available on how either the 3% or 1* spinorbit constant or the 1&`È3&~energy gap depends on the number of carbon atoms, the most natural explanation for the systematic change in j is one in which the energy gap smoothly decreases as the chain length increases.…”

Section: Frequencymentioning

confidence: 99%

Laboratory Detection of Five New Linear Silicon Carbides: SiC₃, SiC₅, SiC₆, SiC₇, and SiC₈

McCarthy¹,

Apponi²,

Gottlieb³

et al. 2000

ApJ

View full text Add to dashboard Cite

Infrared laser spectroscopy of jet-cooled carbon clusters

Cited by 60 publications

References 34 publications

Mobilities of carbon cluster ions: Critical importance of the molecular attractive potential

Mobilities of carbon cluster ions: Critical importance of the molecular attractive potential

Photoelectron spectra of the C2nH− (n=1–4) and C2nD− (n=1–3) anions

Laboratory Detection of Five New Linear Silicon Carbides: SiC₃, SiC₅, SiC₆, SiC₇, and SiC₈

Contact Info

Product

Resources

About

Infrared laser spectroscopy of jet-cooled carbon clusters

Cited by 60 publications

References 34 publications

Mobilities of carbon cluster ions: Critical importance of the molecular attractive potential

Mobilities of carbon cluster ions: Critical importance of the molecular attractive potential

Photoelectron spectra of the C2nH− (n=1–4) and C2nD− (n=1–3) anions

Laboratory Detection of Five New Linear Silicon Carbides: SiC3, SiC5, SiC6, SiC7, and SiC8

Contact Info

Product

Resources

About

Laboratory Detection of Five New Linear Silicon Carbides: SiC₃, SiC₅, SiC₆, SiC₇, and SiC₈