Browsing by Author "Brandariz, Isabel"
Now showing items 1-15 of 15
-
A further study of acetylacetone nitrosation
Iglesias, Emilia; Brandariz, Isabel (Royal Society of Chemistry, 2013-02)The nitrosation of acetylacetone (AcAc) has been revised in an aqueous acid medium of perchloric acid and buffers of mono-, di-, or tri-chloroacetic acid. The results show that in the presence of buffers, under conditions ... -
A Pentadentate Member of the Picolinate Family for Mn(ɪɪ) Complexation and an Amphiphilic Derivative
Pujales-Paradela, Rosa; Carniato, Fabio; Uzal-Varela, Rocío; Brandariz, Isabel; Iglesias, Emilia; Platas-Iglesias, Carlos; Botta, Mauro; Esteban-Gómez, David (Royal Society of Chemistry, 2018-12-04)[Abstract] We report a pentadentate ligand containing a 2,2′-azanediyldiacetic acid moiety functionalized with a picolinate group at the nitrogen atom (H3paada), as well as a lipophylic derivative functionalized with a ... -
Effect of ionic strength on the formal potential of the glass electrode in various saline media
Brandariz, Isabel; Vilariño, Teresa; Alonso Suárez, Pablo A.; Herrero, Roberto; Fiol López, Sarah; Sastre de Vicente, Manuel (Elsevier, 1998-08)We examined the variation with ionic strength (I, adjusted with KCl, KNO3, KBr, NaCl or NaClO4) of the formal potential (Econst) for glass electrodes exhibiting a Nernstian response (i.e. Ecell=Econst−s log [H+]). For this ... -
Equilibrium constants of triethanolamine in major seawater salts
Brandariz, Isabel; Castro, P.; Montes, María; Penedo Blanco, Francisco José; Sastre de Vicente, Manuel (Elsevier, 2006-12)Acid–base equilibrium constants of triethanolamine (TEA) have been determined by potentiometric titrations with a glass electrode, at 25 °C. Ionic strength was kept constant with only one electrolyte (using one of these ... -
Exploring the use of rigid 18-membered macrocycles with amide pendant arms for Pb(II)-based radiopharmaceuticals
Harriswangler, Charlene; McNeil, Brooke L.; Brandariz, Isabel; Lucio Martínez, Fátima; Valencia, Laura; Esteban-Gómez, David; Ramogida, Caterina; Platas-Iglesias, Carlos (Frontiers Journal portfolio (Chinese Chemical Society, Royal Society of Chemistry), 2023-12-28)[Abstract]: We report a detailed investigation on the use of chelators PYTAM, H4PYTAMGly, CHX-PYTAM and H4CHX-PYTAMGly for the complexation of Pb(II)-radioisotopes with potential use in the preparation of radiopharmaceuticals. ... -
Fluorescence study of tetracaine–cyclodextrin inclusion complexes
Iglesias García, Iván.; Brandariz, Isabel; Iglesias, Emilia (Taylor and Francis Ltd., 2010-04)The steady-state fluorescence emission from the local anaesthetic tetracaine (TCA) in water-solvent mixtures and in the presence of α-, β- and γ-cyclodextrin (CD) was investigated at various pH values. Emission was observed ... -
Incorporation of Carboxylate Pendant Arms into 18-Membered Macrocycles: Effects on [nat/203Pb]Pb(II) Complexation
Harriswangler, Charlene; McNeil, Brooke L.; Brandariz, Isabel; Valencia, Laura; Esteban-Gómez, David; Ramogida, Caterina; Platas-Iglesias, Carlos (Wiley-VCH, 2024-03-11)[Abstract]: We present a detailed investigation on the coordination chemistry of [nat/203Pb]Pb(II) with chelators H4PYTA and H4CHX-PYTA. These chelators belong to the family of ligands derived from the 18-membered macrocyclic ... -
Iron(III) complexation by Vanchrobactin, a siderophore of the bacterial fish pathogen Vibrio anguillarum
Iglesias, Emilia; Brandariz, Isabel; Jiménez, Carlos; Soengas, Raquel G. (Royal Society of Chemistry, 2011-05)The bacterial fish pathogen Vibrio anguillarum serotype O2 strain RV22 produces the mono catecholate siderophore Vanchrobactin (Vb) under conditions of iron deficiency. Vb contains two potential bidentate coordination ... -
Kinetic and Equilibrium Study of the Reaction of Nitroprusside and Hydroxide Ions: Influence of Ionic Strength Using Pitzer Model
Rubín Carrero, Eugenia; Rodríguez-Barro, Pilar; Brandariz, Isabel; Sastre de Vicente, Manuel (Wiley Interscience, 2004)[Abstract] A kinetic and equilibrium study of the addition reaction of hydroxide ions to nitroprusside has been carried out in this paper. Rate and equilibrium constants at different salt concentrations (up to 4 mol/kg) ... -
Micellar effects on aromatic esters hydrolysis
Brandariz, Isabel; Iglesias, Emilia (Elsevier, 2014-07)The alkaline hydrolysis of two aromatic esters, 2-naphthyl acetate (2NA) and phenyl acetate (PhA) has been tackled in this work. The reaction has been followed in water and in the presence of cationic surfactants with ... -
Potentiometric characterisation of cyclodextrin inclusion complexes of local anaesthetics
Brandariz, Isabel; Iglesias, Emilia (Taylor and Francis Ltd., 2011-09)The complexation of several local anaesthetics by β and γ-cyclodextrins was studied by potentiometry with glass electrode. Tetracaine and dibucaine complexation constants were determined at 25°C in the presence of 0.1 M ... -
Reinforced Ni(ɪɪ)-Cyclam Derivatives as Dual ¹H/¹⁹F MRI Probes
Pujales-Paradela, Rosa; Savic, Tanja; Brandariz, Isabel; Pérez-Lourido, Paulo; Angelovski, Goran; Esteban-Gómez, David; Platas-Iglesias, Carlos (Royal Society of Chemistry, 2019-03-11)[Abstract] Reinforced cross-bridged Ni²⁺-cyclam complexes were functionalised with pendant arms containing both amide protons and CF₃ groups that lead to a dual ¹H/¹⁹F response. The resulting complexes possess very high ... -
Salting coefficient of triethanolamine in major seawater salts
Brandariz, Isabel (Elsevier, 2006-01)Activity coefficient of triethanolamine (TEA) in major seawater salts (NaCl, KCl, CaCl2 and MgCl2) has been determinated using the distribution method. It increases slowly in KCl, remains almost constant in NaCl and decreases ... -
The salting coefficient and size of alkylamines in saline media at different temperatures: estimation from Pitzer equations and the mean spherical approximation
Taboada Pan, Carlos.; Brandariz, Isabel; Barriada, José Luis; Vilariño, Teresa; Sastre de Vicente, Manuel (Elsevier, 2001-04)The renewed theoretical interest in the proton transfer associated to the amino group together with the scarcity of acid-base studies of amines in moderate to concentrated saline media focussed our attention on the study ...
