Source:http://linkedlifedata.com/resource/pubmed/id/16863114
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
47
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| pubmed:dateCreated |
2006-7-25
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| pubmed:abstractText |
In this article, we explore energy transfer processes within a series of Zn-porphyrin-appended dendrimers by means of excitation intensity dependent transient absorption measurements. We report singlet-singlet annihilation on two distinct time scales of 18 +/- 5 ps and 130 +/- 10 ps in the dimer and the dendrimers. The two distinct processes reflect the presence of two structural conformer distributions. Analysis of the singlet-singlet annihilation transient kinetics shows that sequential annihilation occurs within subunits up to four Zn-porphyrins in the dendrimers. The onset of the singlet-singlet annihilation process depending on the size of the molecule reveals a difference in the number of communicating Zn-porphyrins. We further report a full characterization of the transient absorption kinetics of the monomer over a spectral range from 450 to 730 nm.
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| pubmed:language |
eng
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| pubmed:journal | |
| pubmed:status |
PubMed-not-MEDLINE
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| pubmed:month |
Dec
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| pubmed:issn |
1089-5639
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| pubmed:author | |
| pubmed:issnType |
Print
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| pubmed:day |
1
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| pubmed:volume |
109
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| pubmed:owner |
NLM
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| pubmed:authorsComplete |
Y
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| pubmed:pagination |
10654-62
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| pubmed:year |
2005
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| pubmed:articleTitle |
Energy transfer within Zn-porphyrin dendrimers: study of the singlet-singlet annihilation kinetics.
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| pubmed:affiliation |
Department of Chemical Physics, Lund University, Box 124, SE-221 00 Lund, Sweden. Jane.Larsen@chemphys.lu.se
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| pubmed:publicationType |
Journal Article
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