Si4 anion

Vibrational and/or electronic energy levels

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Marilyn E. Jacox

State:   ?
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
Td = 17180 ± 80 gas Kitsopoulos, Chick, et al., 1990
Arnold and Neumark, 1993
Xu, Taylor, et al., 1998

State:   A
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
To = 11438 gas A-X 747 875 Achiba, Kohno, et al., 2005
To = 11460 ± 3 Ne A-X 780 875 Fulara, Freivogel, et al., 1996
Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
Ag 1 343 gas MPD Achiba, Kohno, et al., 2005
ag 1 352 ± 4 Ne AB Fulara, Freivogel, et al., 1996
2 277 gas MPD Achiba, Kohno, et al., 2005
2 278 ± 4 Ne AB Fulara, Freivogel, et al., 1996

State:   X

Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
ag 2 365 gas TPE Arnold and Neumark, 1993

Additional references: Jacox, 1994, page 183; Jacox, 1998, page 247; Jacox, 2003, page 218

Notes

oEnergy separation between the v = 0 levels of the excited and electronic ground states.
dPhotodissociation threshold

References

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Kitsopoulos, Chick, et al., 1990
Kitsopoulos, T.N.; Chick, C.J.; Weaver, A.; Neumark, D.M., Vibrationally Resolved Photoelectron Spectra of Si-3- and Si-4-, J. Chem. Phys., 1990, 93, 8, 6108, https://doi.org/10.1063/1.459004 . [all data]

Arnold and Neumark, 1993
Arnold, C.C.; Neumark, D.M., Study of Si4 and Si4- using threshold photodetachment (ZEKE) spectroscopy, J. Chem. Phys., 1993, 99, 5, 3353, https://doi.org/10.1063/1.465145 . [all data]

Xu, Taylor, et al., 1998
Xu, C.; Taylor, T.R.; Burton, G.R.; Neumark, D.M., Vibrationally resolved photoelectron spectroscopy of silicon cluster anions Si[sub n][sup -] (n=3--7), J. Chem. Phys., 1998, 108, 4, 1395, https://doi.org/10.1063/1.475511 . [all data]

Achiba, Kohno, et al., 2005
Achiba, Y.; Kohno, M.; Ohara, M.; Suzuki, S.; Shiromaru, H., Electron detachment spectroscopic study on carbon and silicon cluster anions, J. Electron Spectrosc. Relat. Phenom., 2005, 142, 3, 231, https://doi.org/10.1016/j.elspec.2004.09.016 . [all data]

Fulara, Freivogel, et al., 1996
Fulara, J.; Freivogel, P.; Grutter, M.; Maier, J.P., Electronic Absorption Spectra of Si, J. Phys. Chem., 1996, 100, 46, 18042, https://doi.org/10.1021/jp962575h . [all data]

Jacox, 1994
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules, American Chemical Society, Washington, DC, 1994, 464. [all data]

Jacox, 1998
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules: supplement A, J. Phys. Chem. Ref. Data, 1998, 27, 2, 115-393, https://doi.org/10.1063/1.556017 . [all data]

Jacox, 2003
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules: supplement B, J. Phys. Chem. Ref. Data, 2003, 32, 1, 1-441, https://doi.org/10.1063/1.1497629 . [all data]

Notes

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