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SPECTROSCOPIC RESEARCH OF Pt + NH$_3$1

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/30543

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Title: SPECTROSCOPIC RESEARCH OF Pt + NH$_3$1
Creators: Gengler, Jamie; Steimle, T. C.; Chen, Jinhai
Issue Date: 2005
Abstract: The reaction products of laser ablated platinum with an ammonia/argon supersonic gas expansion mixture have been monitored in the 13500 cm$^{-1}$ to 12400 cm$^{-1}$ spectral region using laser induced fluorescence (LIF) spectroscopy. Four band features with heads near 13440 cm$^{-1}$, 13250 cm$^{-1}$, 13120 cm$^{-1}$, and 12435 cm$^{-1}$ were detected. Analysis of the dispersed fluorescence suggests that the carriers of the latter three bands are Pt$_2$}, 7543 (2001).}, PtN, and PtN. Possible electronic transition assignments for these systems based upon existing electronic structure predictions for Pt$_2$}, 6573 (1987).} and PtN}, 643 (1995).} will be given. The dispersed fluorescence spectrum for the 13440 cm$^{-1}$ band, which exhibits two progressions having $\Delta$G$_v$ of $\sim$ $ 450 cm^{-1}$ and $\sim$ $ 650 cm^{-1}$, suggests that the carrier of this band is polyatomic. The excitation LIF and dispersed LIF spectra are not altered upon substitution of NH$_3$ with ND$_3$ suggesting that the carrier is PtN$_2$ with linear asymmetric geometry}, 7799 (2001).}'}, 5453 (1973).}. The high resolution LIF spectrum (FWHM = 35 MHz) of the 13440 cm$^{-1}$ band of a molecular beam sample reveals rotational structure which can be assigned to the major $^{194}$Pt, $^{195}$Pt, $^{196}$Pt, and $^{198}$Pt isotopomers. Progress on the analysis of the high resolution LIF and optical Stark measurements for the 13440 cm$^{-1}$ band will be presented.
URI: http://hdl.handle.net/1811/30543
Other Identifiers: 2005-TC-11
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