Molecular beam optical study of gold sulfide and gold oxide

Zhang, Ruohan

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https://hdl.handle.net/2142/91314 Copy

Description

Title

Molecular beam optical study of gold sulfide and gold oxide

Author(s)

Zhang, Ruohan

Contributor(s)

• Steimle, Timothy
• Yu, Yuanqin

Issue Date

2016-06-22

Keyword(s)

(Hyper)fine structure, tunneling

Abstract

Gold-sulfur and gold-oxygen bonds are key components to numerous established and emerging technologies that have applications as far ranging as medical imaging, catalysis, electronics, and material science. A major theoretical challenge for describing this bonding is correctly accounting for the large relativistic and electron correlation effects. Such effects are best studied in diatomic, AuX, molecules. Recently, the observed AuS electronic state energy ordering was measured and compared to a simple molecular orbital diagram prediction\footnote{D. L. Kokkin, R. Zhang, T. C. Steimle, I. A. Wyse, B. W. Pearlman and T. D. Varberg, \textit {J. Phys. Chem. A.}, {\textbf{119(48)}}, 4412, 2015.}. Here we more thoroughly investigate the nature of the electronic states of both AuS and AuO from the analysis of high-resolution (FWHM$\cong35$MHz) optical Zeeman spectroscopy of the (0,0)\textit {B}$^{2}$$\Sigma$$^{-}$$-$\textit {X}$^{2}$$\Pi$$_{3/2}$ bands. The determined fine and hyperfine parameters for the \textit {B}$^{2}$$\Sigma$$^{-}$ state of AuO differ from those extracted from the analysis of a hot, Doppler-limited, spectrum\footnote{L. C. O'Brien, B. A. Borchert, A. Farquhar, S. Shaji, J. J. O'Brien and R. W. Field, \textit {J. Mol. Spectrosc.}, {\textbf{252(2)}}, 136, 2008.}. It is demonstrated that the nature of the \textit {B}$^{2}$$\Sigma$$^{-}$ states of AuO and AuS are radically different. The magnetic tuning of AuO and AuS indicates that the \textit {B}$^{2}$$\Sigma$$^{-}$ states are heavily contaminated.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

En

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http://hdl.handle.net/2142/91314

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Copyright 2016 by the authors

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