Source:http://linkedlifedata.com/resource/pubmed/id/17722895
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
37
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| pubmed:dateCreated |
2007-9-13
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| pubmed:abstractText |
In this article, we report the pure three-photon absorption effects of two novel symmetrical fluorene-based molecules with 2D-pi-2D [9,9-diethylhexyl-2,7-bis-(N,N-diphenylamine)fluorene] and 2D-D-pi-D-2D [5,5'-(9,9-bis-(2-ethylhexyl)-9H-fluorene-2-yl)bis(N,N-diphenylthiophen-2-amine)] structural motifs. The obtained three-photon absorption cross sections, (4.74 +/- 0.01) x 10(-76) and (6.77 +/- 0.02) x 10(-76) cm(6) s(2) for the 2D-pi-2D and 2D-D-pi-D-2D archetypes, respectively, are rather high. The geometries and electronic excitations of the two molecules were systematically studied by the PM3 and ZINDO/S methods. The influence of the different molecular structures on the three-photon absorption cross section is discussed micromechanically. The experimental and theoretical results demonstrate that the transition dipole moment between the ground and final states is the most definitive factor. A new fitting method that is more accurate than those reported previously was used to obtain the 3PA coefficient.
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| pubmed:language |
eng
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| pubmed:journal | |
| pubmed:status |
PubMed-not-MEDLINE
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| pubmed:month |
Sep
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| pubmed:issn |
1089-5639
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| pubmed:author | |
| pubmed:issnType |
Print
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| pubmed:day |
20
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| pubmed:volume |
111
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| pubmed:owner |
NLM
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| pubmed:authorsComplete |
Y
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| pubmed:pagination |
9013-8
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| pubmed:year |
2007
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| pubmed:articleTitle |
Three-photon absorption cross-section enhancement in two symmetrical fluorene-based molecules.
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| pubmed:affiliation |
Institute of Microsystem of Physics, Department of Physics and Electronics, Henan University, Kaifeng, Henan 475001, P. R. China. junhuiliu@henu.edu.cn
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| pubmed:publicationType |
Journal Article
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