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

W. Sun, C. C. Byeon, M. M. Mckerns, C. M. Lawson, J. M. Dunn, M. Hariharasarma, G. M. Gray

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations

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 χ(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 χ(3) value is stopped. Hence, it is possible to obtain a CH2Cl2 solution with high χ(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 χ(3) values, the increase in χ(3) values doesn't stop even though excess free ligand is added. Further, the increase in the χ(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 χ(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.

Original languageEnglish
Pages (from-to)108-115
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume3472
DOIs
StatePublished - 1998
EventNonlineair Optical Liquids for Power Limiting and Imaging - San Diego, CA, United States
Duration: 22 Jul 199822 Jul 1998

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