Surface-Enhanced Raman Scattering of 5-Fluorouracil adsorbed on silver nanostructures Abstract Raman and surface-enhanced Raman scattering (SERS) of 5-fluorouracil (5-FU) have been recorded under several experimental conditions. SERS spectra have been analysed according to a resonant charge-transfer (CT) mechanism similar to a resonance Raman (RR) process, involving the photoinduced transfer of an electron from the Fermi…

Inclusion Compounds of Phenol Derivatives with Cyclodextrins: a combined spectroscopic and thermal analysis. Abstract Inclusion compounds involving α-, β- and γ-cyclodextrins (α-, β- and γCD) and phenol derivatives, namely 3-methoxyphenol (3MeOPh), 2-methoxyphenol (2MeOPh) and 3-methylphenol (3MePh), were investigated and characterized by combining Raman spectroscopy, ab initio calculations, DSC and TG analysis. The effects of the…

Hydrogen-bonding in Nitrofurantoin polymorphs: a computationally-assisted spectroscopic study Abstract The importance of hydrogen-bond formation in the molecular packing arrangements of two anhydrous forms of nitrofurantoin is investigated, combining computational methods and spectroscopic data. The overall results indicate, as expected, that the vibrational modes related to the C=O, N- H and C-H groups are strongly affected…

A comparative analysis of phycocolloids produced by underutilized versus industrially utilized carrageenophytes (Gigartinales, Rhodophyta) Abstract Carrageenan (E-407) and semi-refined carrageenan (E-407a) are some of the main additives used by the food industry for their gelling, emulsifying, thickening, and stabilizing properties. These are natural ingredients, which have been used for decades in food applications and are…

Structural and Photoluminescence Studies of a Europium(III) Tetrakis(β-diketonate) Complex with Tetrabutylammonium, Imidazolium, Pyridinium and Silica-Supported Imidazolium Counterions Abstract Tetrakis(naphthoyltrifluoroacetonato)lanthanate(III) complexes (Ln = Eu, Gd) containing the cations tetrabutylammonium, [NBu4]+; 1-butyl-3-methylimidazolium, [C4mim]+; and 1-butyl-3-methylpyridinium, [C4mpyr]+, have been prepared and structurally characterized by single-crystal X-ray diffraction. The {EuO8} coordination sphere in [NBu4][Eu(NTA)4] is best described as a…