Population gratings in degenerate four-wave mixing studies of a nickel dithiolene at 1064 nm

The nickel dithiolene complex Ni(S 2C 2PhBu) 2 has been studied using time-resolved degenerate four-wave mixing (DFWM) at 1064 nm. An analysis of the polarisation and temporal behaviour using the near-counter-propagating geometry shows that population gratings make a substantial contribution to the...

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Bibliographic Details
Published in:Chemical physics letters 1996-02, Vol.250 (1), p.120-127
Main Authors: Kuebler, Stephen M., Denning, Robert G.
Format: Article
Language:English
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Summary:The nickel dithiolene complex Ni(S 2C 2PhBu) 2 has been studied using time-resolved degenerate four-wave mixing (DFWM) at 1064 nm. An analysis of the polarisation and temporal behaviour using the near-counter-propagating geometry shows that population gratings make a substantial contribution to the DFWM signals. These findings contrast with previous DFWM studies using a retro-reflection geometry which suggested that faster processes dominate. Experimental artefacts, inherent to the retro-reflection configuration, can account for this difference. Measurements of the orientational relaxation time in several solvents, and an estimated excited state lifetime in dichloromethane, are presented.
ISSN:0009-2614
1873-4448
DOI:10.1016/0009-2614(95)01396-2