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Title: Spectroscopic and photophysical studies of a naphthalene-based emissive probe for metal cations
Authors: Castro, Catherine S. de 
Melo, J. Sérgio Seixas de 
Fernández-Lodeiro, Adrián 
Núñez, Cristina 
Lodeiro, Carlos 
Keywords: Naphthalene; Metals; Fluorescence quenching; Time-resolved fluorescence; Dimer
Issue Date: Sep-2014
Publisher: Elsevier
Citation: 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
Serial title, monograph or event: Inorganic Chemistry Communications
Volume: 47
Abstract: 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.
ISSN: 1387-7003
DOI: 10.1016/j.inoche.2014.07.007
Rights: openAccess
Appears in Collections:I&D CQC - Artigos em Revistas Internacionais
FCTUC Química - Artigos em Revistas Internacionais

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