File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Detection of transient CuICuICuII mixed-valence acetylide complexes from nanosecond transient absorption studies

TitleDetection of transient CuICuICuII mixed-valence acetylide complexes from nanosecond transient absorption studies
Authors
Issue Date1994
Citation
Journal Of Physical Chemistry, 1994, v. 98 n. 31, p. 7545-7547 How to Cite?
AbstractThe photophysics of a series of luminescent trinuclear copper(I) acetylide complexes are described. These compounds are found to exhibit long-lived photoluminescence in fluid solutions at room temperature. The phosphorescent state of these trinuclear copper(I) acetylides are found to be efficiently quenched by pyridinium acceptors. Nanosecond transient absorption spectroscopy establishes the electron-transfer nature of these quenching reactions. Intense absorptions in the 790-830-nm near-infrared region have been attributed to the formation of transient mixed-valence trinuclear copper acetylide species. The transient decay of both the pyridinyl radical and the mixed-valence copper complexes has been shown to follow second-order kinetics. The back-electron-transfer rate constants have been estimated to be near diffusion-controlled, with k b = 2.3 × 10 10 dm 3 mol -1 s -1 for the reaction of 4-(methoxycarbonyl)-N-methylpyridinyl radical with [Cu 3(dppm) 3(μ 3-η 1-C≡CPh) 2] 2+ ([1] +), 1.7 × 10 10 dm 3 mol -1 s -1 with [Cu 3(dppm) 3(μ 3-η 1-C≡C tBu) 2] 2+ ([2] +), and 2.7 × 10 10 dm 3 mol -1 s -1 with [Cu 3(dppm) 3(μ 3-η 1-C≡CtBu)(μ 3-Cl)] 2+ ([3] +). © 1994 American Chemical Society.
Persistent Identifierhttp://hdl.handle.net/10722/167337
ISSN
1998 Impact Factor: 4.173
1999 SCImago Journal Rankings: 1.721
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorYam, VWWen_US
dc.contributor.authorLee, WKen_US
dc.contributor.authorYeung, PKYen_US
dc.contributor.authorPhillips, Den_US
dc.date.accessioned2012-10-08T03:05:48Z-
dc.date.available2012-10-08T03:05:48Z-
dc.date.issued1994en_US
dc.identifier.citationJournal Of Physical Chemistry, 1994, v. 98 n. 31, p. 7545-7547en_US
dc.identifier.issn0022-3654en_US
dc.identifier.urihttp://hdl.handle.net/10722/167337-
dc.description.abstractThe photophysics of a series of luminescent trinuclear copper(I) acetylide complexes are described. These compounds are found to exhibit long-lived photoluminescence in fluid solutions at room temperature. The phosphorescent state of these trinuclear copper(I) acetylides are found to be efficiently quenched by pyridinium acceptors. Nanosecond transient absorption spectroscopy establishes the electron-transfer nature of these quenching reactions. Intense absorptions in the 790-830-nm near-infrared region have been attributed to the formation of transient mixed-valence trinuclear copper acetylide species. The transient decay of both the pyridinyl radical and the mixed-valence copper complexes has been shown to follow second-order kinetics. The back-electron-transfer rate constants have been estimated to be near diffusion-controlled, with k b = 2.3 × 10 10 dm 3 mol -1 s -1 for the reaction of 4-(methoxycarbonyl)-N-methylpyridinyl radical with [Cu 3(dppm) 3(μ 3-η 1-C≡CPh) 2] 2+ ([1] +), 1.7 × 10 10 dm 3 mol -1 s -1 with [Cu 3(dppm) 3(μ 3-η 1-C≡C tBu) 2] 2+ ([2] +), and 2.7 × 10 10 dm 3 mol -1 s -1 with [Cu 3(dppm) 3(μ 3-η 1-C≡CtBu)(μ 3-Cl)] 2+ ([3] +). © 1994 American Chemical Society.en_US
dc.languageengen_US
dc.relation.ispartofJournal of Physical Chemistryen_US
dc.titleDetection of transient CuICuICuII mixed-valence acetylide complexes from nanosecond transient absorption studiesen_US
dc.typeArticleen_US
dc.identifier.emailYam, VWW:wwyam@hku.hken_US
dc.identifier.authorityYam, VWW=rp00822en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1021/j100082a025-
dc.identifier.scopuseid_2-s2.0-0001277299en_US
dc.identifier.hkuros1370-
dc.identifier.volume98en_US
dc.identifier.issue31en_US
dc.identifier.spage7545en_US
dc.identifier.epage7547en_US
dc.identifier.isiWOS:A1994PA68900025-
dc.identifier.scopusauthoridYam, VWW=18539304700en_US
dc.identifier.scopusauthoridLee, WK=14521278700en_US
dc.identifier.scopusauthoridYeung, PKY=7006727700en_US
dc.identifier.scopusauthoridPhillips, D=22998496000en_US

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats