Abstract
The complexes [Fe{η-C 5 H 4 -(E)-CH= CH-4-C 6 H 4 C≡CX} 2 ] [X=SiMe 3 (1), H (2), Au(PCy 3 ) (3), Au(PPh 3 ) (4), Au(PMe 3 ) (5), RuCl(dppm) 2 (7), RuCl(dppe) 2 (8)] and [Fe{η-C 5 H 4 -(E)-CH= CH-4-C 6 H 4 CH≡CRuCl} (dppm) 2 } 2 ](PF 6 ) 2 (6) have been prepared and the identities of 1 and 7 confirmed by single-crystal X-ray structural studies. Complexes 1-8 exhibit reversible oxidation waves in their cyclic voltammograms attributed to the Fe II/III couple of the ferrocenyl groups, 6-8 also showing reversible (7, 8) or nonreversible (6) processes attributed to Ru-centered oxidation. Cubic nonlinearities at 800 nm by the Z-scan method are low for 1-5; in contrast, complexes 6 and 7 exhibit large negative γ real and large γ imag values. A factor of 4 difference in γ and two-photon absorption cross-section σ 2 values for 6 and 7 suggest that they have potential as protically switchable NLO materials.
Original language | English (US) |
---|---|
Pages (from-to) | 56-65 |
Number of pages | 10 |
Journal | Journal of Organometallic Chemistry |
Volume | 670 |
Issue number | 1-2 |
DOIs | |
State | Published - Mar 17 2003 |
Keywords
- Acetylide
- Electrochemistry
- Gold
- Hyperpolarizability
- Iron
- Nonlinear optics
- Ruthenium
ASJC Scopus subject areas
- Biochemistry
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry
- Materials Chemistry