Spectroscopic and thermal studies on the complexation of trans-cinnamic acid and a number of its hydroxyl-derivatives with alpha, beta and gamma-cyclodextrins molecules. Abstract The inclusion compounds of α-, β- and γ-cyclodextrins (α-CD, β-CD and γ-CD) with trans-cinnamic acid (t-CIA), 3-hydroxy-trans-cinnamic acid (t-3OHCIA), 4-hydroxy-trans-cinnamic acid (t-4OHCIA) and 3,4-dihydroxy-trans-cinnamic acid (t-3,4OHCIA) were prepared and characterized, in the…

The solid-liquid phase diagrams of binary mixtures of consecutive, even saturated fatty acids: differing by four carbon atoms. Abstract The complete solid–liquid phase diagrams for four binary mixtures of saturated fatty acids are presented, for the first time, in this work. These mixtures are formed by caprylic acid (C8:0) + lauric acid (C12:0), capric acid…

Surface Enhanced Raman Scattering of trans-3-Hydroxycinnamic acid adsorbed on Silver Nanoparticles Abstract SERS of trans-3-hydroxycinnamic acid adsorbed on silver colloids have been analyzed in order to detect resonant charge transfer processes similar to a resonance Raman mechanism, involving the photoinduced transfer of an electron from the metal to the adsorbate (SERS-CT). Theoretical SERS-CT intensities for…

Effect of hydrogen bonding in the vibrational spectra of trans-cinnamic acid. Abstract A computationally-assisted methodology to assign the vibrational spectra of molecular materials (PiMM) has been successfully applied to the Raman and infrared (IR) spectra of trans-cinnamic acid (t-CIA) in the solid state. The effects of molecular association through O-H center dot center dot center…

MCM-41 derivatised with pyridyl groups and its use as a support for luminescent europium(III) complexes. Abstract An organic-inorganic hybrid ligand silica was prepared by reaction of the ordered mesoporous silica MCM-41 with 3-triethoxysilylpropyl 4-pyridylacetamide. Elemental analysis indicated that a pyridyl group loading of 0.93 mmolg(-1) was achieved. The derivatised material was further characterised by powder…