TY - JOUR
T1 - Enhancement of the third-order susceptibility of cis-Mo(CO)4(PPh3)2 solution by oxygen in different solvents
AU - Sun, W.
AU - Byeon, C. C.
AU - Mckerns, M. M.
AU - Lawson, C. M.
AU - Dunn, J. M.
AU - Hariharasarma, M.
AU - Gray, G. M.
PY - 1998
Y1 - 1998
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0032405041&partnerID=8YFLogxK
U2 - 10.1117/12.326878
DO - 10.1117/12.326878
M3 - Conference article
AN - SCOPUS:0032405041
SN - 0277-786X
VL - 3472
SP - 108
EP - 115
JO - Proceedings of SPIE - The International Society for Optical Engineering
JF - Proceedings of SPIE - The International Society for Optical Engineering
T2 - Nonlineair Optical Liquids for Power Limiting and Imaging
Y2 - 22 July 1998 through 22 July 1998
ER -