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Article: Crystal structure, spectroscopy and crystal field analysis of substituted 1,10-phenanthroline-europium complexes
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TitleCrystal structure, spectroscopy and crystal field analysis of substituted 1,10-phenanthroline-europium complexes
 
AuthorsPan, Z3 4
Jia, G3
Duan, CK3
Wong, WY2
Wong, WT1
Tanner, PA3
 
KeywordsAbsorbance
Electronic structure
Europium
Luminescence
 
Issue Date2011
 
PublisherWiley - V C H Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.eurjic.org
 
CitationEuropean Journal Of Inorganic Chemistry, 2011 n. 5, p. 637-646 [How to Cite?]
DOI: http://dx.doi.org/10.1002/ejic.201000908
 
AbstractCrystal structures and vibrational and electronic spectroscopic data are reported for europium(III) complexes with 5(or 4)-R-1,10-phenanthroline (phen) ligands (R = chloro, methyl, nitro, amino). All complexes comprise a 10-coordinate Eu 3+ ion with three chelating nitrato anions and two bidentate phen ligands. The crystal structures are of three distinct types with space groups C2/c, P2 1/n and P1̄. The room-temperature emission spectra are dominated by the forced electric dipole 5D 0→ 7F 2 emission of Eu 3+. The excitation spectra show that the triplet donor state of the nitro-substituted complex has a lower energy than the other complexes and the lower luminescence quantum efficiency of this complex is rationalized. The emission spectra recorded at 10 K have been compared with those of the corresponding Eu 3+-doped yttrium complexes using different excitation lines as a criterion of sample purity. The spectrum of the unsubstituted phen complex is more clearly resolved than those of the other complexes and this has been attributed to disorder resulting in inhomogeneous broadening. A detailed crystal field analysis is given for the phen complex from the fitting of 24 crystal field energy levels. A comparison with other complexes has been made through derived second-rank crystal field strengths. No simple relationships have been derived from comparisons of energy levels, spectral line positions, or second-rank crystal field strengths with crystallographic data or Taft constants. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
 
ISSN1434-1948
2013 Impact Factor: 2.965
2013 SCImago Journal Rankings: 1.096
 
DOIhttp://dx.doi.org/10.1002/ejic.201000908
 
ISI Accession Number IDWOS:000287160800004
Funding AgencyGrant Number
Hong Kong University Grants Council ResearchU 102607
National Natural Science Foundation of China10804099
Funding Information:

P. A. T. acknowledges financial support for this project from the Hong Kong University Grants Council Research (Grant City, U 102607). This work was also supported by the National Natural Science Foundation of China (grant number 10804099). We are grateful to Prof. M. Hasegawa for sending reprints of his publications.

 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorPan, Z
 
dc.contributor.authorJia, G
 
dc.contributor.authorDuan, CK
 
dc.contributor.authorWong, WY
 
dc.contributor.authorWong, WT
 
dc.contributor.authorTanner, PA
 
dc.date.accessioned2011-09-23T05:44:02Z
 
dc.date.available2011-09-23T05:44:02Z
 
dc.date.issued2011
 
dc.description.abstractCrystal structures and vibrational and electronic spectroscopic data are reported for europium(III) complexes with 5(or 4)-R-1,10-phenanthroline (phen) ligands (R = chloro, methyl, nitro, amino). All complexes comprise a 10-coordinate Eu 3+ ion with three chelating nitrato anions and two bidentate phen ligands. The crystal structures are of three distinct types with space groups C2/c, P2 1/n and P1̄. The room-temperature emission spectra are dominated by the forced electric dipole 5D 0→ 7F 2 emission of Eu 3+. The excitation spectra show that the triplet donor state of the nitro-substituted complex has a lower energy than the other complexes and the lower luminescence quantum efficiency of this complex is rationalized. The emission spectra recorded at 10 K have been compared with those of the corresponding Eu 3+-doped yttrium complexes using different excitation lines as a criterion of sample purity. The spectrum of the unsubstituted phen complex is more clearly resolved than those of the other complexes and this has been attributed to disorder resulting in inhomogeneous broadening. A detailed crystal field analysis is given for the phen complex from the fitting of 24 crystal field energy levels. A comparison with other complexes has been made through derived second-rank crystal field strengths. No simple relationships have been derived from comparisons of energy levels, spectral line positions, or second-rank crystal field strengths with crystallographic data or Taft constants. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
 
dc.description.natureLink_to_subscribed_fulltext
 
dc.identifier.citationEuropean Journal Of Inorganic Chemistry, 2011 n. 5, p. 637-646 [How to Cite?]
DOI: http://dx.doi.org/10.1002/ejic.201000908
 
dc.identifier.doihttp://dx.doi.org/10.1002/ejic.201000908
 
dc.identifier.epage646
 
dc.identifier.hkuros195818
 
dc.identifier.isiWOS:000287160800004
Funding AgencyGrant Number
Hong Kong University Grants Council ResearchU 102607
National Natural Science Foundation of China10804099
Funding Information:

P. A. T. acknowledges financial support for this project from the Hong Kong University Grants Council Research (Grant City, U 102607). This work was also supported by the National Natural Science Foundation of China (grant number 10804099). We are grateful to Prof. M. Hasegawa for sending reprints of his publications.

 
dc.identifier.issn1434-1948
2013 Impact Factor: 2.965
2013 SCImago Journal Rankings: 1.096
 
dc.identifier.issue5
 
dc.identifier.scopuseid_2-s2.0-79751511245
 
dc.identifier.spage637
 
dc.identifier.urihttp://hdl.handle.net/10722/139007
 
dc.languageeng
 
dc.publisherWiley - V C H Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.eurjic.org
 
dc.publisher.placeGermany
 
dc.relation.ispartofEuropean Journal of Inorganic Chemistry
 
dc.relation.referencesReferences in Scopus
 
dc.subjectAbsorbance
 
dc.subjectElectronic structure
 
dc.subjectEuropium
 
dc.subjectLuminescence
 
dc.titleCrystal structure, spectroscopy and crystal field analysis of substituted 1,10-phenanthroline-europium complexes
 
dc.typeArticle
 
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<contributor.author>Wong, WT</contributor.author>
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Author Affiliations
  1. The University of Hong Kong
  2. Hong Kong Baptist University
  3. City University of Hong Kong
  4. Zhejiang University of Technology