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Use of fluorophores containing phenolic and nitrogenated groups on metal detection by light emission

Grant number: 14/05813-2
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): August 01, 2014
Effective date (End): August 30, 2018
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Organic Chemistry
Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal researcher:Fernando Heering Bartoloni
Grantee:Ronaldo Barros Orfão Junior
Home Institution: Centro de Ciências Naturais e Humanas (CCNH). Universidade Federal do ABC (UFABC). Ministério da Educação (Brasil). Santo André , SP, Brazil
Associated scholarship(s):17/09407-7 - Effect of the presence of metallic ions and cucurbit[n]urils on the phototautomerism of hydroxylated phenylimidazoles, BE.EP.DR


The development of sensors for metal ions in solution, aiming their detection due to these species presence in biological and/or environmental systems, is currently in full activity, with a special interest in increasing the detection limit.Chemical sensors are developed to convert the phenomenon of recognition of the metal ion in a liable detection signal, e.g. in fluorescence emission. The efficiency of these fluorescent sensors for metallic cations comes from their capacity on interacting with ionic species in solution. Evidences for the metal presence may be a change of the free sensor properties, such as the maximum wavelength of emission, the fluorescence intensity and also the formation of new emission bands. In this sense, the peroxyoxalate reaction - which is a chemiluminescent reaction - allows the detection of metallic cations on a quantitative way, with higher sensitivity when compared to purely fluorescent techniques.In this project, we aim the preparation of hydroxylated compounds derived from lophine (1 and 2) and molecules containing biphenyl (3) or aryltriazolic (4) groups. The photophysical study of these compounds will be carried out in the presence and absence of metal cations, aiming their quantification. Furthermore, chemiluminescence assays will be performed for the detection of metal cations, using compounds 1 to 4 as activators of the peroxyoxalate chemiluminescent reaction. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
REIS, ROBERTA ALBINO; BOARO, ANDREIA; ORFAO, RONALDO BARROS; MELO, DIEGO ULYSSES; BARTOLONI, FERNANDO HEERING. The decomposition of triphenylimidazole-para-acetate follows specific base catalysis and can be conveniently followed by fluorescence. LUMINESCENCE, v. 34, n. 2, p. 234-242, MAR 2019. Web of Science Citations: 0.
ORFAO, JR., RONALDO B.; DE CARVALHO, FABRICIO; HOMEM-DE-MELLO, PAULA; BARTOLONI, FERNANDO H. On the Fluorescent, Steric and Electronic Factors Affecting the Detection of Metallic Ions Using an Imidazolyl-Phenolic Derived Fluorescent Probe. Journal of the Brazilian Chemical Society, v. 28, n. 10, p. 1896-1904, OCT 2017. Web of Science Citations: 4.
ORFAO, JR., RONALDO BARROS; ALVES, JESSICA; BARTOLONI, FERNANDO HEERING. Spectroscopic Studies on the Interaction of Metallic Ions with an Imidazolyl-Phenolic System. Journal of Fluorescence, v. 26, n. 4, p. 1373-1380, JUL 2016. Web of Science Citations: 5.

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