Spectroscopic and photophysical studies of a naphthalene-based emissive probe for metal cations

Catherine S. de Castro; J. Sérgio Seixas De Melo; Adrian Fernandez-Lodeiro; Cristina Nunez; C. Lodeiro

doi:10.1016/j.inoche.2014.07.007

Spectroscopic and photophysical studies of a naphthalene-based emissive probe for metal cations

Catherine S. de Castro, J. Sérgio Seixas De Melo, Adrian Fernandez-Lodeiro, Cristina Nunez, C. Lodeiro

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

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. © 2014 Elsevier B.V.

Original language	English
Pages (from-to)	27-32
Number of pages	6
Journal	Inorganic Chemistry Communications
Volume	47
DOIs	https://doi.org/10.1016/j.inoche.2014.07.007
Publication status	Published - Sep 2014

Keywords

Dimer
Fluorescence quenching
Metals
Naphthalene
Time-resolved fluorescence

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@article{e09926520b394c1b9ccc7e714e302248,

title = "Spectroscopic and photophysical studies of a naphthalene-based emissive probe for metal cations",

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. {\textcopyright} 2014 Elsevier B.V.",

keywords = "Dimer, Fluorescence quenching, Metals, Naphthalene, Time-resolved fluorescence",

author = "{de Castro}, {Catherine S.} and {S{\'e}rgio Seixas De Melo}, J. and Adrian Fernandez-Lodeiro and Cristina Nunez and C. Lodeiro",

note = "Sem PDF. Scientific Association Proteomass (Portugal) Fundacao para a Ciencia e a Tecnologia/FEDER (Portugal/EU) (SFRH/BD/75134/2010) Scientific Proteomass Association Fundacao para a Ciencia e a Tecnologia (FCT), Portuguese Agency for Scientific Research (PEst-OE/QUI/UI0313/2014) Xunta de Galicia (Spain) ",

year = "2014",

month = sep,

doi = "10.1016/j.inoche.2014.07.007",

language = "English",

volume = "47",

pages = "27--32",

journal = "Inorganic Chemistry Communications",

issn = "1387-7003",

publisher = "Elsevier Science Publisher B.V.",

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T1 - Spectroscopic and photophysical studies of a naphthalene-based emissive probe for metal cations

AU - de Castro, Catherine S.

AU - Sérgio Seixas De Melo, J.

AU - Fernandez-Lodeiro, Adrian

AU - Nunez, Cristina

AU - Lodeiro, C.

N1 - Sem PDF. Scientific Association Proteomass (Portugal) Fundacao para a Ciencia e a Tecnologia/FEDER (Portugal/EU) (SFRH/BD/75134/2010) Scientific Proteomass Association Fundacao para a Ciencia e a Tecnologia (FCT), Portuguese Agency for Scientific Research (PEst-OE/QUI/UI0313/2014) Xunta de Galicia (Spain)

PY - 2014/9

Y1 - 2014/9

N2 - 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. © 2014 Elsevier B.V.

AB - 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. © 2014 Elsevier B.V.

KW - Dimer

KW - Fluorescence quenching

KW - Metals

KW - Naphthalene

KW - Time-resolved fluorescence

U2 - 10.1016/j.inoche.2014.07.007

DO - 10.1016/j.inoche.2014.07.007

M3 - Article

VL - 47

SP - 27

EP - 32

JO - Inorganic Chemistry Communications

JF - Inorganic Chemistry Communications

SN - 1387-7003

ER -