New fluoroionophores for metal cations based on benzo[d]oxazol-5-yl-alanine bearing pyrrole and imidazole

doi:10.1016/j.dyepig.2017.12.040

Utilize este identificador para referenciar este registo: https://hdl.handle.net/1822/57334

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Campo DC	Valor	Idioma
dc.contributor.author	Esteves, Cátia Isabel Canavezes	por
dc.contributor.author	Ferreira, Rosa Cristina Moutinho	por
dc.contributor.author	Raposo, M. Manuela M.	por
dc.contributor.author	Costa, Susana P. G.	por
dc.date.accessioned	2018-12-17T09:36:17Z	-
dc.date.issued	2018	-
dc.identifier.citation	C. I. C. Esteves, R. C. M. Ferreira, M. M. M. Raposo, S. P. G. Costa, “New fluoroionophores for metal cations based on benzo[d]oxazol-5-yl-alanine bearing pyrrole and imidazole”, Dyes and Pigments, 2018, 151, 211–218.	por
dc.identifier.issn	0143-7208	por
dc.identifier.uri	https://hdl.handle.net/1822/57334	-
dc.description.abstract	Highly emissive heterocyclic alanines bearing a benzo[d]oxazolyl unit functionalised with pyrrole and imidazole at the side chain were synthesised and evaluated as fluorimetric chemosensors for different anions and metal cations. The results obtained by UV-Vis and fluorescence titrations as well as 1H NMR titrations indicate that there is a strong interaction through the donor N and O atoms at the side chain of the benzoxazolyl-alanines, with high selectivity towards Cu2+ and Pd2+ in a ligand-to-metal complex with 1:2 stoichiometry, and association constants were calculated for some ions. The photophysical and ion sensing properties of these unnatural amino acids suggest that they can be used to obtain bioinspired frameworks for metal ion recognition such as peptides/proteins with chemosensory/probing ability.	por
dc.description.sponsorship	Thanks are due to Fundação para a Ciência e Tecnologia (FCT-Portugal) and FEDER-COMPETE for financial support through the CQ/UM (Ref. UID/QUI/00686/2013 and UID/QUI/0686/2016) and a PhD grant to C.I.C. Esteves (SFRH/BD/68360/2010) and R.C.M. Ferreira (SFRH/BD/86408/2012). The NMR spectrometer Bruker Avance III 400 is part of the National NMR Network and was purchased within the framework of the National Program for Scientific Re-equipment, contract REDE/1517/RMN/2005 with funds from POCI 2010 (FEDER) and FCT.	por
dc.language.iso	eng	por
dc.publisher	Elsevier 1	por
dc.relation	info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBD%2F68360%2F2010/PT	por
dc.relation	info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBD%2F86408%2F2012/PT	por
dc.relation	UID/QUI/0686/2013	por
dc.relation	UID/QUI/0686/2016	por
dc.rights	restrictedAccess	por
dc.rights.uri	http://creativecommons.org/licenses/by/4.0/	por
dc.subject	Benzoxazole	por
dc.subject	Pyrrole	por
dc.subject	Imidazole	por
dc.subject	amino acids	por
dc.subject	chemosensors	por
dc.subject	Unnatural amino acids	por
dc.subject	Fluorescent chemosensors	por
dc.title	New fluoroionophores for metal cations based on benzo[d]oxazol-5-yl-alanine bearing pyrrole and imidazole	por
dc.type	article	por
dc.peerreviewed	yes	por
dc.relation.publisherversion	https://www.sciencedirect.com/science/article/abs/pii/S0143720817319940	por
oaire.citationStartPage	211	por
oaire.citationEndPage	218	por
oaire.citationVolume	151	por
dc.identifier.doi	10.1016/j.dyepig.2017.12.040	por
dc.subject.fos	Ciências Naturais::Ciências Químicas	por
dc.description.publicationversion	info:eu-repo/semantics/publishedVersion	por
dc.subject.wos	Science & Technology	por
sdum.journal	Dyes and Pigments	por
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