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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Esteves Da Silva, Jcge
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (18/18 displayed)
- 2020At-line monitoring of salification process of the antiretroviral lamivudine-saccharinate salt using FT-MIR spectroscopy with multivariate curve resolutioncitations
- 2019At-line green synthesis monitoring of new pharmaceutical co-crystals lamivudine:theophylline polymorph I and II, quantification of polymorph I among its APIs using FT-IR spectroscopy and MCR-ALScitations
- 2016Characterization of cellulose membranes modified with luminescent silicon quantum dots nanoparticlescitations
- 2014NO Fluorescence Quantification by Chitosan CdSe Quantum Dots Nanocompositescitations
- 2014Fingerprint detection and using intercalated CdSe nanoparticles on non-porous surfacescitations
- 2013Solid luminescent CdSe-thiolated porous phosphate heterostructures. Application in fingermark detection in different surfacescitations
- 2013Inclusion of thiol DAB dendrimer/CdSe quantum dots based in a membrane structure: Surface and bulk membrane modificationcitations
- 2013Coal Rank Increase and Aerial Oxidation by a Combination of Fourier Transform Infrared Spectroscopy with Multivariate Analysiscitations
- 2012Thiolated DAB dendrimer/ZnSe nanoparticles for C-reactive protein recognition in human serumcitations
- 2012Thiolated DAB dendrimers and CdSe quantum dots nanocomposites for Cd(II) or Pb(II) sensingcitations
- 2011CdS nanocomposites assembled in porous phosphate heterostructures for fingerprint detectioncitations
- 2011Chemometric Analysis of Excitation Emission Matrices of Fluorescent Nanocompositescitations
- 2011Analytical and bioanalytical applications of carbon dotscitations
- 2011Hybrid porous phosphate heterostructures as adsorbents of Hg(II) and Ni(II) from industrial sewagecitations
- 2011CdSe quantum dots capped PAMAM dendrimer nanocomposites for sensing nitroaromatic compoundscitations
- 2010Fluorescent Properties of a Hybrid Cadmium Sulfide-Dendrimer Nanocomposite and its Quenching with Nitromethanecitations
- 2010Porous phosphate heterostructures containing CdS quantum dots: assembly, characterization and photoluminescencecitations
- 2009Mercury(II) sensing based on the quenching of fluorescence of CdS-dendrimer nanocompositescitations
Places of action
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article
Fluorescent Properties of a Hybrid Cadmium Sulfide-Dendrimer Nanocomposite and its Quenching with Nitromethane
Abstract
A fluorescent hybrid cadmium sulphide quantum dots (QDs) dendrimer nanocomposite (DAB-CdS) synthesised in water and stable in aqueous solution is described. The dendrimer, DAB-G5 dendrimer (polypropylenimine tetrahexacontaamine) generation 5, a diaminobutene core with 64 amine terminal primary groups. The maximum of the excitation and emission spectra, Stokes' shift and the emission full width of half maximum of this nanocomposite are, respectively: 351, 535, 204 and 212 nm. The fluorescence time decay was complex and a four component decay time model originated a good fit (chi = 1.20) with the following lifetimes: tau (1) = 657 ps; tau (2) = 10.0 ns; tau (3) = 59.42 ns; and tau (4) = 265 ns. The fluorescence intensity of the nanocomposite is markedly quenched by the presence of nitromethane with a dynamic Stern-Volmer constant of 25 M(-1). The quenching profiles show that about 81% of the CdS QDs are located in the external layer of the dendrimer accessible to the quencher. PARAFAC analysis of the excitation emission matrices (EEM) acquired as function of the nitromethane concentration showed a trilinear data structure with only one linearly independent component describing the quenching which allows robust estimation of the excitation and emission spectra and of the quenching profiles. This water soluble and fluorescent nanocomposite shows a set of favourable properties to its use in sensor applications.