Enhancement of the third-order susceptibility of cis-Mo(CO)4(PPh3)2 solution by oxygen in different solvents

Wenfang Sun; Clare C. Byeon; Michael M. McKerns; Christopher M. Lawson; J. Michael Dunn; M. Hariharasarma; Gary M. Gray

doi:10.1117/12.326878

12 October 1998 Enhancement of the third-order susceptibility of cis-Mo(CO₄ (PPh₃)₂ solution by oxygen in different solvents

Wenfang Sun, Clare C. Byeon, Michael M. McKerns, Christopher M. Lawson, J. Michael Dunn, M. Hariharasarma, Gary M. Gray

Author Affiliations +

Proceedings Volume 3472, Nonlinear Optical Liquids for Power Limiting and Imaging; (1998) https://doi.org/10.1117/12.326878
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

Detailed degenerate four wave mixing (DFWM) studies of one molybdenum complex, cis-Mo(CO)₄(PPh₃)₂ in dichloromethane (CH₂Cl₂) and tetrahydrofuran (THF) are reported in this paper. Upon exposure to air/oxygen, the (chi) ⁽³) values of CH₂Cl₂ and THF solutions of this complex increase dramatically with time. However, when excess free ligand is added to CH₂Cl₂ solution of the complex, the increase in (chi) ⁽³) value is stopped. Hence, it is possible to obtain a CH₂Cl₂ solution with high (chi) ⁽³) value by first oxidizing the solution and then adding excess ligand to stabilize the solution. For THF solution, probably due to the different mechanism causing the increase of (chi) ⁽³) values, the increase in (chi) ⁽³) values doesn't stop even though excess free ligand is added. Further, the increase in the (chi) ⁽³) values of both the CH₂Cl₂ and THF solutions parallels the increase in the linear absorption but it is unclear whether the increased linear absorption plays any role in the increase in the (chi) ⁽³) value of the solution. This study also shows how degenerate four wave mixing can be used as a very sensitive technique to detect the chemical change in a solution when the third order optical nonlinearities of the reactant and product are very different.

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Wenfang Sun, Clare C. Byeon, Michael M. McKerns, Christopher M. Lawson, J. Michael Dunn, M. Hariharasarma, and Gary M. Gray "Enhancement of the third-order susceptibility of cis-Mo(CO₄ (PPh₃)₂ solution by oxygen in different solvents", Proc. SPIE 3472, Nonlinear Optical Liquids for Power Limiting and Imaging, (12 October 1998); https://doi.org/10.1117/12.326878

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