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Article: Blue luminescent zinc(II) complexes with polypyridylamine ligands: Crystal structures and luminescence properties

TitleBlue luminescent zinc(II) complexes with polypyridylamine ligands: Crystal structures and luminescence properties
Authors
Issue Date1999
Citation
Journal Of The Chemical Society - Dalton Transactions, 1999 n. 10, p. 1581-1586 How to Cite?
AbstractA series of blue luminescent zinc(II) complexes, [Zn(dpa)X2] [dpa = di-2-pyridylamine, X = OAc 1a, Cl 1b, CN 1c or 4-MeC6H4S 1d], [Zn(dpa)2][CF3SO3]2 2, [Zn(tpda)X2] [tpda = 2,6-bis(2-pyridylamino)pyridine, X = OAc 3a or Cl 3b] and [Zn(tpda)(CF3SO3)2] 4 has been prepared. Their molecular structures, except complex 4, have been established by X-ray crystallography. In the crystal lattice of 2 the [Zn(dpa)2]2+ cations and CF3SO3 - anions are disposed in pairs via intermolecular hydrogen bonds [N(2)⋯O(2) 2.865(4) Å]. The crystal packing of [Zn(dpa)(OAc)2] 1a revealed that two adjacent molecules associate in pairs through intermolecular hydrogen bonding [N(2) ⋯O(4′) 2.816(3) Å]. However, the crystal lattice of its tpda derivative 3a shows that the molecules are linked by extensive intermolecular hydrogen bonding between the amino groups and the acetate ligands [N(2)⋯O(2′) 2.805(3) and N(4)⋯O(4′) 2.860(3) Å] resulting in an interlocking hydrogen bond network. Polymeric one-dimensional tapes are generated through extended π-π stacking interactions between the molecules of [Zn(dpa)(4-MeC6H4S)2] 1d, and the thiolate groups are aligned in an all-anti conformation along the metal chain. In the case of [Zn(dpa)(CN)2] 1c, co-operative intermolecular hydrogen bonds and aromatic π-π interactions in its solid state lead to a supramolecular two-dimensional sheet. All the zinc(II) complexes display high energy intraligand 1(π-π*) fluorescence in degassed MeOH at 298 K, and intraligand 3(π-π*) phosphorescence in a glassy solution (MeOH-EtOH 1:2 at 77 K). An emission band observed for 1c (418 nm) and 1d (481 nm) in their solid state emission spectra is ascribed to excimeric emission due to aromatic π-π interactions.
Persistent Identifierhttp://hdl.handle.net/10722/168046
ISSN
1999 Impact Factor: 2.31
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorHo, KYen_US
dc.contributor.authorYu, WYen_US
dc.contributor.authorCheung, KKen_US
dc.contributor.authorChe, CMen_US
dc.date.accessioned2012-10-08T03:14:30Z-
dc.date.available2012-10-08T03:14:30Z-
dc.date.issued1999en_US
dc.identifier.citationJournal Of The Chemical Society - Dalton Transactions, 1999 n. 10, p. 1581-1586en_US
dc.identifier.issn0300-9246en_US
dc.identifier.urihttp://hdl.handle.net/10722/168046-
dc.description.abstractA series of blue luminescent zinc(II) complexes, [Zn(dpa)X2] [dpa = di-2-pyridylamine, X = OAc 1a, Cl 1b, CN 1c or 4-MeC6H4S 1d], [Zn(dpa)2][CF3SO3]2 2, [Zn(tpda)X2] [tpda = 2,6-bis(2-pyridylamino)pyridine, X = OAc 3a or Cl 3b] and [Zn(tpda)(CF3SO3)2] 4 has been prepared. Their molecular structures, except complex 4, have been established by X-ray crystallography. In the crystal lattice of 2 the [Zn(dpa)2]2+ cations and CF3SO3 - anions are disposed in pairs via intermolecular hydrogen bonds [N(2)⋯O(2) 2.865(4) Å]. The crystal packing of [Zn(dpa)(OAc)2] 1a revealed that two adjacent molecules associate in pairs through intermolecular hydrogen bonding [N(2) ⋯O(4′) 2.816(3) Å]. However, the crystal lattice of its tpda derivative 3a shows that the molecules are linked by extensive intermolecular hydrogen bonding between the amino groups and the acetate ligands [N(2)⋯O(2′) 2.805(3) and N(4)⋯O(4′) 2.860(3) Å] resulting in an interlocking hydrogen bond network. Polymeric one-dimensional tapes are generated through extended π-π stacking interactions between the molecules of [Zn(dpa)(4-MeC6H4S)2] 1d, and the thiolate groups are aligned in an all-anti conformation along the metal chain. In the case of [Zn(dpa)(CN)2] 1c, co-operative intermolecular hydrogen bonds and aromatic π-π interactions in its solid state lead to a supramolecular two-dimensional sheet. All the zinc(II) complexes display high energy intraligand 1(π-π*) fluorescence in degassed MeOH at 298 K, and intraligand 3(π-π*) phosphorescence in a glassy solution (MeOH-EtOH 1:2 at 77 K). An emission band observed for 1c (418 nm) and 1d (481 nm) in their solid state emission spectra is ascribed to excimeric emission due to aromatic π-π interactions.en_US
dc.languageengen_US
dc.relation.ispartofJournal of the Chemical Society - Dalton Transactionsen_US
dc.titleBlue luminescent zinc(II) complexes with polypyridylamine ligands: Crystal structures and luminescence propertiesen_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.doi10.1039/a900504h-
dc.identifier.scopuseid_2-s2.0-33748654868en_US
dc.identifier.hkuros45070-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33748654868&selection=ref&src=s&origin=recordpageen_US
dc.identifier.issue10en_US
dc.identifier.spage1581en_US
dc.identifier.epage1586en_US
dc.identifier.isiWOS:000080543500013-
dc.identifier.scopusauthoridHo, KY=8428892200en_US
dc.identifier.scopusauthoridYu, WY=7403913673en_US
dc.identifier.scopusauthoridCheung, KK=7402406613en_US
dc.identifier.scopusauthoridChe, CM=7102442791en_US

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