| pubmed-article:18402440 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:18402440 | lifeskim:mentions | umls-concept:C0035973 | lld:lifeskim |
| pubmed-article:18402440 | lifeskim:mentions | umls-concept:C0023688 | lld:lifeskim |
| pubmed-article:18402440 | lifeskim:mentions | umls-concept:C1704241 | lld:lifeskim |
| pubmed-article:18402440 | pubmed:issue | 9 | lld:pubmed |
| pubmed-article:18402440 | pubmed:dateCreated | 2008-4-29 | lld:pubmed |
| pubmed-article:18402440 | pubmed:abstractText | The structural effect on the metal-to-ligand charge transfer (MLCT) excited-state lifetime has been investigated in bis-tridentate Ru(II)-polypyridyl complexes based on the terpyridine-like ligands [6-(2,2'-bipyridyl)](2-pyridyl)methane ( 1) and 2-[6-(2,2'-bipyridyl)]-2-(2-pyridyl)propane ( 2). A homoleptic ([Ru( 2) 2] (2+)) and a heteroleptic complex ([Ru(ttpy)( 2)] (2+)) based on the new ligand 2 have been prepared and their photophysical and structural properties studied experimentally and theoretically and compared to the results for the previously reported [Ru( 1) 2] (2+). The excited-state lifetime of the homoleptic Ru (II) complex with the isopropylene-bridged ligand 2 was found to be 50 times shorter than that of the corresponding homoleptic Ru (II) complex of ligand 1, containing a methylene bridge. A comparison of the ground-state geometries of the two homoleptic complexes shows that steric interactions involving the isopropylene bridges make the coordination to the central Ru (II) ion less octahedral in [Ru( 2) 2] (2+) than in [Ru( 1) 2] (2+). Calculations indicate that the structural differences in these complexes influence their ligand field splittings as well as the relative stabilities of the triplet metal-to-ligand charge transfer ( (3)MLCT) and metal-centered ( (3)MC) excited states. The large difference in measured excited-state lifetimes for the two homoleptic Ru (II) complexes is attributed to a strong influence of steric interactions on the ligand field strength, which in turn affects the activation barriers for thermal conversion from (3)MLCT states to short-lived (3)MC states. | lld:pubmed |
| pubmed-article:18402440 | pubmed:language | eng | lld:pubmed |
| pubmed-article:18402440 | pubmed:journal | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:18402440 | pubmed:citationSubset | IM | lld:pubmed |
| pubmed-article:18402440 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:18402440 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:18402440 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:18402440 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:18402440 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:18402440 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:18402440 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:18402440 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:18402440 | pubmed:month | May | lld:pubmed |
| pubmed-article:18402440 | pubmed:issn | 0020-1669 | lld:pubmed |
| pubmed-article:18402440 | pubmed:author | pubmed-author:BergquistJona... | lld:pubmed |
| pubmed-article:18402440 | pubmed:author | pubmed-author:JohanssonOlof... | lld:pubmed |
| pubmed-article:18402440 | pubmed:author | pubmed-author:HammarströmLe... | lld:pubmed |
| pubmed-article:18402440 | pubmed:author | pubmed-author:RasmussenTorb... | lld:pubmed |
| pubmed-article:18402440 | pubmed:author | pubmed-author:NorrbyPer-Ola... | lld:pubmed |
| pubmed-article:18402440 | pubmed:author | pubmed-author:LundqvistMari... | lld:pubmed |
| pubmed-article:18402440 | pubmed:author | pubmed-author:ErikssonLarsL | lld:pubmed |
| pubmed-article:18402440 | pubmed:author | pubmed-author:AkermarkBjörn... | lld:pubmed |
| pubmed-article:18402440 | pubmed:author | pubmed-author:PerssonPetter... | lld:pubmed |
| pubmed-article:18402440 | pubmed:author | pubmed-author:BeckerHans-Ch... | lld:pubmed |
| pubmed-article:18402440 | pubmed:author | pubmed-author:WolpherHenrie... | lld:pubmed |
| pubmed-article:18402440 | pubmed:author | pubmed-author:AbrahamssonMa... | lld:pubmed |
| pubmed-article:18402440 | pubmed:issnType | Print | lld:pubmed |
| pubmed-article:18402440 | pubmed:day | 5 | lld:pubmed |
| pubmed-article:18402440 | pubmed:volume | 47 | lld:pubmed |
| pubmed-article:18402440 | pubmed:owner | NLM | lld:pubmed |
| pubmed-article:18402440 | pubmed:authorsComplete | Y | lld:pubmed |
| pubmed-article:18402440 | pubmed:pagination | 3540-8 | lld:pubmed |
| pubmed-article:18402440 | pubmed:meshHeading | pubmed-meshheading:18402440... | lld:pubmed |
| pubmed-article:18402440 | pubmed:meshHeading | pubmed-meshheading:18402440... | lld:pubmed |
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| pubmed-article:18402440 | pubmed:meshHeading | pubmed-meshheading:18402440... | lld:pubmed |
| pubmed-article:18402440 | pubmed:meshHeading | pubmed-meshheading:18402440... | lld:pubmed |
| pubmed-article:18402440 | pubmed:meshHeading | pubmed-meshheading:18402440... | lld:pubmed |
| pubmed-article:18402440 | pubmed:meshHeading | pubmed-meshheading:18402440... | lld:pubmed |
| pubmed-article:18402440 | pubmed:meshHeading | pubmed-meshheading:18402440... | lld:pubmed |
| pubmed-article:18402440 | pubmed:meshHeading | pubmed-meshheading:18402440... | lld:pubmed |
| pubmed-article:18402440 | pubmed:meshHeading | pubmed-meshheading:18402440... | lld:pubmed |
| pubmed-article:18402440 | pubmed:meshHeading | pubmed-meshheading:18402440... | lld:pubmed |
| pubmed-article:18402440 | pubmed:meshHeading | pubmed-meshheading:18402440... | lld:pubmed |
| pubmed-article:18402440 | pubmed:meshHeading | pubmed-meshheading:18402440... | lld:pubmed |
| pubmed-article:18402440 | pubmed:meshHeading | pubmed-meshheading:18402440... | lld:pubmed |
| pubmed-article:18402440 | pubmed:year | 2008 | lld:pubmed |
| pubmed-article:18402440 | pubmed:articleTitle | Steric influence on the excited-state lifetimes of ruthenium complexes with bipyridyl-alkanylene-pyridyl ligands. | lld:pubmed |
| pubmed-article:18402440 | pubmed:affiliation | Department of Photochemistry and Molecular Science, Uppsala University, Uppsala, Sweden. | lld:pubmed |
| pubmed-article:18402440 | pubmed:publicationType | Journal Article | lld:pubmed |
| pubmed-article:18402440 | pubmed:publicationType | Research Support, Non-U.S. Gov't | lld:pubmed |
