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| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Lazarides, T. | en |
| dc.contributor.author | Adams, H. | en |
| dc.contributor.author | Sykes, D. | en |
| dc.contributor.author | Faulkner, S. | en |
| dc.contributor.author | Calogero, G. | en |
| dc.contributor.author | Ward, M. D. | en |
| dc.date.accessioned | 2015-11-24T16:38:48Z | - |
| dc.date.available | 2015-11-24T16:38:48Z | - |
| dc.identifier.issn | 1477-9226 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/8087 | - |
| dc.rights | Default Licence | - |
| dc.subject | near-infrared luminescence | en |
| dc.subject | transfer excited-states | en |
| dc.subject | photophysical properties | en |
| dc.subject | lanthanide luminescence | en |
| dc.subject | polypyridyl complexes | en |
| dc.subject | dinuclear complexes | en |
| dc.subject | crystal-structures | en |
| dc.subject | d-block | en |
| dc.subject | metal | en |
| dc.subject | sensitization | en |
| dc.title | Heteronuclear bipyrimidine-bridged Ru-Ln and Os-Ln dyads: low-energy (MLCT)-M-3 states as energy-donors to Yb(III) and Nd(III) | en |
| heal.type | journalArticle | - |
| heal.type.en | Journal article | en |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.identifier.primary | Doi 10.1039/B714640j | - |
| heal.identifier.secondary | <Go to ISI>://000253046700018 | - |
| heal.identifier.secondary | http://pubs.rsc.org/en/content/articlepdf/2008/dt/b714640j | - |
| heal.language | en | - |
| heal.access | campus | - |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας | el |
| heal.publicationDate | 2008 | - |
| heal.abstract | The complexes [Ru((t)Bu(2)bipy)(bpym)X-2] (X = Cl, NCS) and [M((t)Bu(2)bipy)(2)(bpym)][PF6](2) (M = Ru, Os) all have a low-energy LUMO arising from the presence of a 2,2'-bipyrimidine ligand, and consequently have lower-energy (MLCT)-M-1 and (MLCT)-M-3 states than analogous complexes of bipyridine. The vacant site of the bpym ligand provides a site at which {Ln(diketonate)(3)} units can bind to afford bipyrimidine-bridged dinuclear Ru-Ln and Os-Ln dyads; four such complexes have been structurally characterised. UV/Vis and luminescence spectroscopic studies show that binding of the Ln(III) fragment at the second site of the bpym ligand reduces the (MLCT)-M-3 energy of the Ru or Os fragment still further. The result is that in the dyads [Ru((t)Bu(2)bipy)X-2(mu-bpym)Ln(diketonate)(3)] (X = Cl, NCS) and [Os((t)Bu(2)bipy)(2)(mu-bpym)Ln(diketonate)(3)][PF6](2) the (MLCT)-M-3 is too low to sensitise the luminescent f-f states of Nd(III) and Yb(III), but in [Ru((t)Bu(2)bipy)(2)(mu-bpym)Ln(diketonate)(3)][PF6](2) the (MLCT)-M-3 energy of 13 500 cm(-1) permits energy transfer to Yb(III) and Nd(III) resulting in sensitised near-infrared luminescence on the microsecond timescale. | en |
| heal.publisher | Royal Society of Chemistry | en |
| heal.journalName | Dalton Transactions | en |
| heal.journalType | peer reviewed | - |
| heal.fullTextAvailability | TRUE | - |
| Appears in Collections: | Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά). ΧΗΜ | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Lazarides-2008-Heteronuclear bipyri.pdf | 277.02 kB | Adobe PDF | View/Open Request a copy |
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