File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Electronic spectra and photophysics of platinum(II) complexes with α-diimine ligands. Mixed complexes with halide ligands

TitleElectronic spectra and photophysics of platinum(II) complexes with α-diimine ligands. Mixed complexes with halide ligands
Authors
Issue Date1993
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/ic
Citation
Inorganic Chemistry, 1993, v. 32 n. 11, p. 2518-2524 How to Cite?
AbstractEmission properties have been studied for a series of compounds of the formula (L2)PtCl2, where L2 is N,N,N′,N′-tetramethylethylenediamine, 2,2′-bipyridine (bpy), 4,4′-Me2bpy, 5,5′-Me2bpy, 4,4′-(t-Bu)2bpy, 3,3′-(CH3OCO)2bpy, and 1,10-phenanthroline, and also for the compound Pt(bpy)I2. Most of them exhibit orange to red luminescence from a triplet ligand-field (3LF) state, both as solids and in glassy solution. These emissions are very broad (fwhm 2300-3400 cm-1 at 10 K) and structureless and are strongly Stokes-shifted from absorption. The two exceptions are the solid "red" form of Pt(bpy)Cl2, which exhibits a relatively narrow (fwhm 1050 cm-1 at 10 K), vibronically structured (Δν ∼ 1500 cm-1) red emission, and Pt(3,3′-(CH3OCO)2bpy)Cl2, which exhibits a broad (fwhm 2500 cm-1 at 10 K) but structured (Δν ∼ 1300 cm-1) orange emission. Both of these emissions are assigned to triplet metal-to-ligand charge-transfer (3MLCT) excited states. For the former compound, a linear-chain structure has destabilized a dσ*(dz2) level, yielding a dσ* → π*(bpy) state as the lowest energy excited state, while for the latter, the strongly electron-withdrawing substituents have stabilized a bpy π* level, yielding a dxz,yz → π*(bpy) state as the lowest energy excited state. The relative energies of the various types of excited states, including ligand 3ππ* states, are discussed in detail. The crystal structures of Pt(5,5′-Me2bpy)Cl2 (monoclinic Cc, Z = 4, a = 13.413(7) Å, b = 9.063(4) Å, c = 12.261(9) Å, β = 121.71(6)°) and Pt(3,3′-(CH3OCO)2bpy)Cl2 (triclinic P1, Z = 2, a = 7.288(2) Å, b = 9.932(3) Å, c = 11.881(5) Å, α = 98.04(3)°, β = 103.56(3)°, γ = 106.54(3)°) are reported. © 1993 American Chemical Society.
Persistent Identifierhttp://hdl.handle.net/10722/168074
ISSN
2015 Impact Factor: 4.82
2015 SCImago Journal Rankings: 1.873
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorMiskowski, VMen_US
dc.contributor.authorHoulding, VHen_US
dc.contributor.authorChe, CMen_US
dc.contributor.authorWang, Yen_US
dc.date.accessioned2012-10-08T03:14:50Z-
dc.date.available2012-10-08T03:14:50Z-
dc.date.issued1993en_US
dc.identifier.citationInorganic Chemistry, 1993, v. 32 n. 11, p. 2518-2524en_US
dc.identifier.issn0020-1669en_US
dc.identifier.urihttp://hdl.handle.net/10722/168074-
dc.description.abstractEmission properties have been studied for a series of compounds of the formula (L2)PtCl2, where L2 is N,N,N′,N′-tetramethylethylenediamine, 2,2′-bipyridine (bpy), 4,4′-Me2bpy, 5,5′-Me2bpy, 4,4′-(t-Bu)2bpy, 3,3′-(CH3OCO)2bpy, and 1,10-phenanthroline, and also for the compound Pt(bpy)I2. Most of them exhibit orange to red luminescence from a triplet ligand-field (3LF) state, both as solids and in glassy solution. These emissions are very broad (fwhm 2300-3400 cm-1 at 10 K) and structureless and are strongly Stokes-shifted from absorption. The two exceptions are the solid "red" form of Pt(bpy)Cl2, which exhibits a relatively narrow (fwhm 1050 cm-1 at 10 K), vibronically structured (Δν ∼ 1500 cm-1) red emission, and Pt(3,3′-(CH3OCO)2bpy)Cl2, which exhibits a broad (fwhm 2500 cm-1 at 10 K) but structured (Δν ∼ 1300 cm-1) orange emission. Both of these emissions are assigned to triplet metal-to-ligand charge-transfer (3MLCT) excited states. For the former compound, a linear-chain structure has destabilized a dσ*(dz2) level, yielding a dσ* → π*(bpy) state as the lowest energy excited state, while for the latter, the strongly electron-withdrawing substituents have stabilized a bpy π* level, yielding a dxz,yz → π*(bpy) state as the lowest energy excited state. The relative energies of the various types of excited states, including ligand 3ππ* states, are discussed in detail. The crystal structures of Pt(5,5′-Me2bpy)Cl2 (monoclinic Cc, Z = 4, a = 13.413(7) Å, b = 9.063(4) Å, c = 12.261(9) Å, β = 121.71(6)°) and Pt(3,3′-(CH3OCO)2bpy)Cl2 (triclinic P1, Z = 2, a = 7.288(2) Å, b = 9.932(3) Å, c = 11.881(5) Å, α = 98.04(3)°, β = 103.56(3)°, γ = 106.54(3)°) are reported. © 1993 American Chemical Society.en_US
dc.languageengen_US
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/icen_US
dc.relation.ispartofInorganic Chemistryen_US
dc.titleElectronic spectra and photophysics of platinum(II) complexes with α-diimine ligands. Mixed complexes with halide ligandsen_US
dc.typeArticleen_US
dc.identifier.emailChe, CM:cmche@hku.hken_US
dc.identifier.authorityChe, CM=rp00670en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1021/ic00063a052-
dc.identifier.scopuseid_2-s2.0-33751385732en_US
dc.identifier.volume32en_US
dc.identifier.issue11en_US
dc.identifier.spage2518en_US
dc.identifier.epage2524en_US
dc.identifier.isiWOS:A1993LE48900052-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridMiskowski, VM=6603008214en_US
dc.identifier.scopusauthoridHoulding, VH=6602351870en_US
dc.identifier.scopusauthoridChe, CM=7102442791en_US
dc.identifier.scopusauthoridWang, Y=36072665800en_US

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats