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https://hdl.handle.net/10316/27846
Título: | Spectroscopic and photophysical studies of a naphthalene-based emissive probe for metal cations | Autor: | Castro, Catherine S. de Melo, J. Sérgio Seixas de Fernández-Lodeiro, Adrián Núñez, Cristina Lodeiro, Carlos |
Palavras-chave: | Naphthalene; Metals; Fluorescence quenching; Time-resolved fluorescence; Dimer | Data: | Set-2014 | Editora: | Elsevier | Citação: | CASTRO, Catherine S. de [et. al] - Spectroscopic and photophysical studies of a naphthalene-based emissive probe for metal cations. "Inorganic Chemistry Communications". ISSN 1387-7003. Vol. 47 (2014) p. 27–32 | Título da revista, periódico, livro ou evento: | Inorganic Chemistry Communications | Volume: | 47 | Resumo: | A comprehensive photophysical characterization of a bis-naphthalene derivative, L, was carried out in acetonitrile, using UV–Vis absorption, steady-state and time-resolved emission spectroscopy. It was found that in the 250–400 nm region, the absorption spectra showed two bands with maxima at ~ 220 nm and ~ 292 nm whereas the emission spectrum showed a band settled between 300 and 550 nm. A detailed time-resolved investigation (in the ps and ns time domain) showed that the fluorescence decay of L in dichloromethane was bi-exponential indicative of the presence of a ground-state equilibrium involving two species: monomeric (absorption of a single naphthalene unit) and dimeric. Upon addition of Cu2 +, Zn2 +, Cd2 + or Hg2 + metal cations in acetonitrile a quenching of the fluorescence emission was observed. From time-resolved data, it is shown that the fluorescence contribution of the species with the longest decay time was sensitive to the explored metal ions. | URI: | https://hdl.handle.net/10316/27846 | ISSN: | 1387-7003 | DOI: | 10.1016/j.inoche.2014.07.007 | Direitos: | openAccess |
Aparece nas coleções: | I&D CQC - Artigos em Revistas Internacionais FCTUC Química - Artigos em Revistas Internacionais |
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Spectroscopic and photophysical studies.pdf | 715.48 kB | Adobe PDF | Ver/Abrir |
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