A5029515204- Adsorption and biosorption for pollutant removal
- Chemical and Physical Properties in Aqueous Solutions
- Electrochemical Analysis and Applications
- Analytical Chemistry and Sensors
- Phosphorus and nutrient management
- Heavy metals in environment
- Crystallization and Solubility Studies
- Analytical chemistry methods development
- Thermodynamic properties of mixtures
- Mercury impact and mitigation studies
- Chromium effects and bioremediation
- Radioactive element chemistry and processing
- Metal complexes synthesis and properties
- Lanthanide and Transition Metal Complexes
- X-ray Diffraction in Crystallography
- Lipid Membrane Structure and Behavior
- Arsenic contamination and mitigation
- Magnetism in coordination complexes
- Crystallography and molecular interactions
- Environmental remediation with nanomaterials
- Dye analysis and toxicity
- Aluminum toxicity and tolerance in plants and animals
- Molecular Sensors and Ion Detection
- Supramolecular Chemistry and Complexes
- Clay minerals and soil interactions
Universidade da Coruña
2015-2025
Centro de Investigación Docencia y Consultoria Administrativa
2019-2020
Centro Médico Sanitas A Coruña
2019
University of Plymouth
2003-2005
Universidad de Oviedo
2000
University of Florence
2000
Durham University
1999
We report the Mn(II) complexes with two pyclen-based ligands (pyclen = 3,6,9,15-tetraazabicyclo[9.3.1]pentadeca-1(15),11,13-triene) functionalized acetate pendant arms at either positions 3,6 (3,6-PC2A) or 3,9 (3,9-PC2A) of macrocyclic fragment. The 3,6-PC2A ligand was synthesized in five steps from pyclen oxalate by protecting one secondary amine groups using Alloc chemistry. complex 3,9-PC2A is characterized a higher thermodynamic stability [log KMnL 17.09(2)] than analogue 15.53(1); 0.15...
In this work, water extracts from different bio-based products of plant origin were studied to evaluate their antioxidant capacity and potential form metal nanoparticles aqueous solutions. Two traditional tests, the Folin–Ciocalteu assay DPPH radical scavenging method compared with a more recent one, SNPAC, based on formation silver nanoparticles. The nanoparticle (SNPAC) was optimized for its application in characterization selected work; kinetic studies extract concentration also...
We report two macrocyclic ligands containing a 1,10-diaza-18-crown-6 fragment functionalized with either picolinamide pendant arms (bpa18c6) or one and picolinate arm (ppa18c6–). The X-ray structure of [La(ppa18c6)(H2O)]2+ shows that the ligand binds to metal ion using six donor atoms crown moiety four arms, 11-coordination being completed by presence coordinated water molecule. [Sr(bpa18c6)(H2O)]2+ was also investigated due very similar ionic radii Sr2+ Eu2+. this complex is...
We report a series of ligands containing pentadentate 6,6′-((methylazanediyl)bis(methylene))dipicolinic acid binding units that form mono- (H2dpama), di- (mX(H2dpama)2), and trinuclear (mX(H2dpama)3) complexes with Mn2+ two coordinated water molecules per metal ion, which results in pentagonal bipyramidal coordination around the ions. In contrast, hexadentate ligand 6,6′-((ethane-1,2-diylbis(azanediyl))bis(methylene))dipicolinic (H2bcpe) forms complex distorted octahedral lacks molecules....
Equilibrium, dissociation kinetics, relaxometric and electrochemical properties of the [Mn(PhDTA)]<sup>2−</sup> complex were investigated structure was studied by using DFT calculations.
We present herein the development of a new polycationic cyclophane: "red box", second in series hydrazone-based analogues well-known organic receptor cyclobis(paraquat-p-phenylene)cyclophane ("blue box"). The macrocycle has been prepared an excellent yield aqueous media, and shows both remarkable pH-responsiveness unusual hydrolytic stability two hydrazone C[double bond, length as m-dash]N bonds, associated with charge delocalization amine lone pair. Whilst media box" is able to complex...
We report a detailed study of the photophysical properties EuIII and TbIII complexes with two ligands based on 3,6,10,13-tetraaza-1,8(2,6)-dipyridinacyclotetradecaphane platform containing either four pyridine-2yl-methyl (L1) or hydroxyethyl (L2) pendant arms. The [TbL1]3+ [TbL2]3+ present moderate luminescence quantum yields upon excitation through ligand bands (φH2O = 7.4 21%, respectively). [EuL2]3+ complex displays relatively low yield in H2O 1.6%) that increases considerably D2O (φD2O...
Abstract Crab shell and inexpensive chitin obtained from it have been studied to determine their capability remove cadmium lead aqueous solutions. Factors affecting the process such as pH, metal concentration, time temperature critically analysed. Results show that only uptake on crab is strongly influenced by pH of solution. The was also found be more efficient. Equilibrium data analysis using Langmuir isotherm indicates can at least 1.4 mmol per gram sorbent optimum pH. Temperature studies...
Abstract BACKGROUND: Mercury is considered one of the most harmful heavy metals to environment and human health, so recently remediation processes have been developed eliminate this metal from wastewaters. Metal retention by natural polymers a good alternative technique remove solution. RESULTS: A screening 25 potential mercury sorbents was carried out at three different pH values in order find appropriate biomass polluted waters. High sorption capacities were found for many materials...