Spectroscopic study of Tb3+(beta-diketonate)3: alpha-cyclodextrin inclusion compounds in aqueous solution
Autor(a) principal: | |
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Data de Publicação: | 2007 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of the Brazilian Chemical Society (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532007000200005 |
Resumo: | In this work we describe how the inclusion of Tb3+ beta-diketonate chelates into the hydrophobic cavity of alpha-cyclodextrin enhances the solubility of the complexes in aqueous medium and leads to changes in their photophysical properties. To this end, the complexes [Tb(ppa)3(H2O)2] and [Tb(ppa)3(phen)] (ppa=3-phenyl-2,4-pentanedione; phen = phenantroline) were synthesized and characterized, and they were then included into alpha-cyclodextrin pockets. This inclusion was confirmed by ¹H NMR spectroscopy and the stoichiometry was determined by means of the Job method. In the excitation spectra, the maximum intensity wavelength of the inclusion compounds [Tb(ppa)3(H2O)2]: alpha-CD and [Tb(ppa)3(phen)]:alpha-CD were displaced 15 and 60 nm respectively when compared with the non-CD starting complexes. The typical Tb3+ emission bands were maintained after inclusion of the complexes into alpha-CD and their subsequent solubilization in aqueous medium. |
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Spectroscopic study of Tb3+(beta-diketonate)3: alpha-cyclodextrin inclusion compounds in aqueous solutionterbium(III)beta-diketonatealpha-cyclodextrininclusion compoundluminescenceIn this work we describe how the inclusion of Tb3+ beta-diketonate chelates into the hydrophobic cavity of alpha-cyclodextrin enhances the solubility of the complexes in aqueous medium and leads to changes in their photophysical properties. To this end, the complexes [Tb(ppa)3(H2O)2] and [Tb(ppa)3(phen)] (ppa=3-phenyl-2,4-pentanedione; phen = phenantroline) were synthesized and characterized, and they were then included into alpha-cyclodextrin pockets. This inclusion was confirmed by ¹H NMR spectroscopy and the stoichiometry was determined by means of the Job method. In the excitation spectra, the maximum intensity wavelength of the inclusion compounds [Tb(ppa)3(H2O)2]: alpha-CD and [Tb(ppa)3(phen)]:alpha-CD were displaced 15 and 60 nm respectively when compared with the non-CD starting complexes. The typical Tb3+ emission bands were maintained after inclusion of the complexes into alpha-CD and their subsequent solubilization in aqueous medium.Sociedade Brasileira de Química2007-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532007000200005Journal of the Brazilian Chemical Society v.18 n.2 2007reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532007000200005info:eu-repo/semantics/openAccessRibeiro,Anderson O.Serra,Osvaldo A.eng2007-06-13T00:00:00Zoai:scielo:S0103-50532007000200005Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2007-06-13T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Spectroscopic study of Tb3+(beta-diketonate)3: alpha-cyclodextrin inclusion compounds in aqueous solution |
title |
Spectroscopic study of Tb3+(beta-diketonate)3: alpha-cyclodextrin inclusion compounds in aqueous solution |
spellingShingle |
Spectroscopic study of Tb3+(beta-diketonate)3: alpha-cyclodextrin inclusion compounds in aqueous solution Ribeiro,Anderson O. terbium(III) beta-diketonate alpha-cyclodextrin inclusion compound luminescence |
title_short |
Spectroscopic study of Tb3+(beta-diketonate)3: alpha-cyclodextrin inclusion compounds in aqueous solution |
title_full |
Spectroscopic study of Tb3+(beta-diketonate)3: alpha-cyclodextrin inclusion compounds in aqueous solution |
title_fullStr |
Spectroscopic study of Tb3+(beta-diketonate)3: alpha-cyclodextrin inclusion compounds in aqueous solution |
title_full_unstemmed |
Spectroscopic study of Tb3+(beta-diketonate)3: alpha-cyclodextrin inclusion compounds in aqueous solution |
title_sort |
Spectroscopic study of Tb3+(beta-diketonate)3: alpha-cyclodextrin inclusion compounds in aqueous solution |
author |
Ribeiro,Anderson O. |
author_facet |
Ribeiro,Anderson O. Serra,Osvaldo A. |
author_role |
author |
author2 |
Serra,Osvaldo A. |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Ribeiro,Anderson O. Serra,Osvaldo A. |
dc.subject.por.fl_str_mv |
terbium(III) beta-diketonate alpha-cyclodextrin inclusion compound luminescence |
topic |
terbium(III) beta-diketonate alpha-cyclodextrin inclusion compound luminescence |
description |
In this work we describe how the inclusion of Tb3+ beta-diketonate chelates into the hydrophobic cavity of alpha-cyclodextrin enhances the solubility of the complexes in aqueous medium and leads to changes in their photophysical properties. To this end, the complexes [Tb(ppa)3(H2O)2] and [Tb(ppa)3(phen)] (ppa=3-phenyl-2,4-pentanedione; phen = phenantroline) were synthesized and characterized, and they were then included into alpha-cyclodextrin pockets. This inclusion was confirmed by ¹H NMR spectroscopy and the stoichiometry was determined by means of the Job method. In the excitation spectra, the maximum intensity wavelength of the inclusion compounds [Tb(ppa)3(H2O)2]: alpha-CD and [Tb(ppa)3(phen)]:alpha-CD were displaced 15 and 60 nm respectively when compared with the non-CD starting complexes. The typical Tb3+ emission bands were maintained after inclusion of the complexes into alpha-CD and their subsequent solubilization in aqueous medium. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007-04-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532007000200005 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532007000200005 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-50532007000200005 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
dc.source.none.fl_str_mv |
Journal of the Brazilian Chemical Society v.18 n.2 2007 reponame:Journal of the Brazilian Chemical Society (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
instname_str |
Sociedade Brasileira de Química (SBQ) |
instacron_str |
SBQ |
institution |
SBQ |
reponame_str |
Journal of the Brazilian Chemical Society (Online) |
collection |
Journal of the Brazilian Chemical Society (Online) |
repository.name.fl_str_mv |
Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ) |
repository.mail.fl_str_mv |
||office@jbcs.sbq.org.br |
_version_ |
1750318167798841344 |