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Helena I. S. Nogueira

Researcher at University of Coimbra

Publications -  205
Citations -  6247

Helena I. S. Nogueira is an academic researcher from University of Coimbra. The author has contributed to research in topics: Overweight & Raman spectroscopy. The author has an hindex of 38, co-authored 195 publications receiving 5048 citations. Previous affiliations of Helena I. S. Nogueira include University of Western Australia & University of Reading.

Papers
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Journal ArticleDOI

FT-IR, FT-Raman and SERS spectra of pyridine-3-sulfonic acid.

C. Yohannan Panicker, +3 more
- 01 Jun 2006 - 
TL;DR: FT-IR and FT-Raman spectra of pyridine-3-sulfonic acid are recorded and analysed and a likely 'perpendicular orientation' of the molecule on the silver surface is suggested.
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Raman, IR and SERS spectra of methyl(2-methyl-4,6-dinitrophenylsulfanyl)ethanoate

C. Yohannan Panicker, +4 more
- 01 Aug 2007 - 
TL;DR: Methyl(2-methyl-4,6-dinitrophenylsulfanyl)ethanoate was prepared by nucleophilic substitution and the molecule is adsorbed on the silver surface with the benzene ring in a 'tilted orientation'.
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IR, Raman and SERS Spectra of 2-(Methoxycarbonylmethylsulfanyl)-3,5-dinitrobenzene Carboxylic Acid

Asha Raj, +4 more
- 01 Jan 2009 - 
TL;DR: In this paper, a surface enhanced Raman scattering (SERS) spectrum was recorded on a silver colloid and the vibrational wavenumbers were computed by density functional theoretical (DFT) computations at the B3LYP/6-31G* level and they were found to be in good agreement with the experimental values.
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Novel cerium(IV) heteropolyoxotungstate containing two types of lacunary Keggin anions.

Filipa L. Sousa, +5 more
- 26 Nov 2004 - 
TL;DR: A novel V-shaped polyoxotungstate is formed when Ce(IV) metal centres bridge monolacunary [PW(11)O(39)](7-) anions to an unusual 1,4-bilacunaries which appears with an unprecedented bridging structural motif.
Journal ArticleDOI

Luminescent Polyoxotungstoeuropate Anion‐Pillared Layered Double Hydroxides

Filipa L. Sousa, +8 more
- 01 Feb 2006 - 
TL;DR: In this article, a luminescent polyoxometalate anion-pillared layered double hydroxides (LDHs) were prepared by aqueous ion exchange of a Zn-Al LDH precursor in nitrate form with the europium-containing polyoxotungstate anions [EuW10O36]9] and [euW11O39]6]