Journal article 269 views
Spectroscopic and photophysical studies of a naphthalene-based emissive probe for metal cations
C.S. De Castro,
J. Sérgio Seixas De Melo,
A. Fernández-Lodeiro,
C. Núñez,
C. Lodeiro,
Catherine De Castro 
Inorganic Chemistry Communications, Volume: 47, Pages: 27 - 32
Swansea University Author:
Catherine De Castro
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DOI (Published version): 10.1016/j.inoche.2014.07.007
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...
| Published in: | Inorganic Chemistry Communications |
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| ISSN: | 1387-7003 |
| Published: |
2014
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa31929 |
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| 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. |
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| Keywords: |
Naphthalene; Metals; Fluorescence quenching; Time-resolved fluorescence; Dimer |
| College: |
Faculty of Science and Engineering |
| Start Page: |
27 |
| End Page: |
32 |