Listar Reactividade Química e Fotorreactividade (REACT!) por título
Mostrando ítems 47-66 de 114
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High relaxivity Mn2+-based MRI contrast agents
(Wiley, 2014-12-16)[Abstract] Stable Mn2+ mono- and binuclear complexes containing pentadentate 6,6′-((methylazanediyl)bis(methylene)) dipicolinic acid coordinating units give remarkably high relaxivities due to the presence of two inner-sphere ... -
Highly relaxing gadolinium based MRI contrast agents responsive to Mg2+ sensing
(Royal Society of Chemistry, 2012-04-28)[Abstract] A Gd complex based on a polyphosphonated pyridyl ligand shows a very high stability in aqueous solution (logKEuL = 25.7), a high relaxivity (8.5 mM−1 s−1 at 25 °C and 20 MHz) and a marked and selective relaxivity ... -
Highly stable complexes of divalent metal ions (Mg2+, Ca2+, Cu2+, Zn2+, Cd2+, and Pb2+) with a dota‐like ligand containing a picolinate pendant
(Wiley, 2014-12)[Abstract] The stability constants of complexes of the macrocyclic ligand do3a‐pic4– (H4do3a‐pic = 2,2′,2″‐{10‐[(6‐carboxypyridin‐2‐yl)methyl]‐1,4,7,10‐tetraazacyclododecane 1,4,7‐triyl}triacetic acid) with several divalent ... -
Hyperfine coupling constants on inner‐sphere water molecules of GdIII‐based MRI contrast agents
(Wiley, 2012-11-02)[Abstract] Herein we present a theoretical investigation of the hyperfine coupling constants (HFCCs) on the inner‐sphere water molecules of [Gd(H2O)8]3+ and different GdIII‐based magnetic resonance imaging contrast agents ... -
Importance of outer-sphere and aggregation phenomena in the relaxation properties of phosphonated gadolinium complexes with potential applications as MRI contrast agents
(Wiley, 2015-04-10)[Abstract] A series composed of a tetra-, a tris- and a bisphosphonated ligand based on a pyridine scaffold (L4, L3 and L2, respectively) was studied within the frame of lanthanide (Ln) coordination. The stability constants ... -
Improved Photocatalyzed Degradation of Phenol, as a Model Pollutant, over Metal-Impregnated Nanosized TiO₂
(MDPI, 2020-05-22)[Abstract] Photocatalyzed degradation of phenol in aqueous solution over surface impregnated TiO₂ (M = Cu, Cr, V) under UV-Vis (366 nm) and UV (254 nm) irradiation is described. Nanosized photocatalyts were prepared from ... -
In-depth study of a novel class of ditopic gadolinium(III)-based MRI probes sensitive to zwitterionic neurotransmitters
(Frontiers, 2019-07-24)[Abstract] The efficacy of Gd-based low-molecular weight ditopic MRI probes on binding zwitterionic neurotransmitters (ZNTs) relies on their structural compatibility. ZNTs are challenging biomarkers for monitoring chemical ... -
Inactivation of E. Coli and S. Aureus by Novel Binary Clay/Semiconductor Photocatalytic Macrocomposites Under UVA and Sunlight Irradiation
(Elsevier, 2023-09-08)[Abstract] The disinfection efficiency of several novel photocatalytic macrocomposites made of Ecuadorian clay mixed with two semiconductor materials (TiO2, ZnO) has been evaluated with Staphylococcus aureus and Escherichia ... -
Inert macrocyclic Eu3+ complex with affirmative paraCEST features
(Royal Society of Chemistry, 2020-06-21)[Abstract]: We report on a macrocyclic platform based on an 18-membered macrocycle that forms kinetically highly inert paramagnetic complexes and possesses an excellent outlook for the development of bioresponsive paraCEST ... -
Integrated Valorization of Sargassum Muticum in Biorefineries
(Elsevier, 2020-05-24)[Abstract] Marine macroalgae represent an excellent raw material for the production of bioactives, adsorbents, plant biostimulants, soil fertilizers and biogas. The success in the exploitation of seaweeds depends on their ... -
Introducing Hyaluronic Acid into Supramolecular Polymers and Hydrogels
(American Chemical Society, 2021-10-18)[Abstract] The use of supramolecular polymers to construct functional biomaterials is gaining more attention due to the tunable dynamic behavior and fibrous structures of supramolecular polymers, which resemble those found ... -
Investigations into the effects of linker length elongation on the behaviour of calcium-responsive MRI probes
(Royal Society of Chemistry, 2019-07-25)[Abstract] Understanding the relationship between chemical structure and the effectiveness of bioresponsive magnetic resonance imaging (MRI) contrast agents can offer help to identify key components required for the future ... -
Lead(II) complexes of lateral macrobicyclic receptors that incorporate a crown moiety and a pyridine head unit
(Wiley, 2010-11)[Abstract] The coordinative properties towards lead(II) of two lateral macrobicyclic receptors that incorporate either a 1,10‐diaza‐[15]crown‐5 (L7) or a 4,13‐diaza‐[18]crown‐6 (L8) fragment are reported. Spectrophotometric ... -
Macrocyclic receptor showing improved PbII/ZnII and PbII/CaII selectivities
(Wiley, 2010-05-31)[Abstract] Herein we report on the macrocyclic receptor N,N′‐bis[(6‐carboxy‐2‐pyridyl)methyl]‐1,10‐diaza‐15‐crown‐5 (H2bp15c5) and its coordination properties towards ZnII, CdII, PbII, and CaII. The stability constants of ... -
Magnetic anisotropies in rhombic lanthanide(III) complexes do not conform to Bleaney’s theory
(American Chemical Society, 2016-04-04)[Abstract] We report a complete set of magnetic susceptibilities of lanthanide complexes with a macrocyclic ligand based on a 3,6,10,13-tetraaza-1,8(2,6)-dipyridinacyclotetradecaphane platform containing four hydroxyethyl ... -
Mechanical Stability Is Key for Large-Scale Implementation of Photocatalytic Surface-Attached Film Technologies in Water Treatment
(Frontiers, 2021-10-18)[Abstract] Replacement of classical tertiary water treatment by chemical-free sunlight-driven photocatalytic units has been often proposed. Photocatalysts are required to be cost-effective, inert, chemically stable, reusable, ... -
Modeling the OEC with two new biomimetic models: preparations, structural characterization, and water photolysis studies of a Ba–Mn box type complex and a Mn4N6 planar-diamond cluster
(MDPI, 2018-09-07)[Abstract] The oxygen-evolving complex (OEC) is the native enzyme that catalyzes the oxidation of water in natural photosynthesis. Two new classes of manganese cluster complexes of formula Ba2Mn2L12(H3L1)2(CH3OH)4 1 and ... -
O-versus S-Metal Coordination of the Thiocarboxylate Group: An NMR Study of the Two Tautomeric Forms of the Ga(III)-Photoxenobactin E Complex
(American Chemical Society, 2024-02-22)[Abstract] Photoxenobactin E (1) is a natural product with an unusual thiocarboxylic acid terminus recently isolated from an entomopathogenic bacterium. The biosynthetic gene cluster associated with photoxenobactin E, and ... -
On the Dissociation Pathways of Copper Complexes Relevant as Pet Imaging Agents
(Elsevier, 2022)[Abstract] Several bifunctional chelators have been synthesized in the last years for the development of new 64Cu-based PET agents for in vivo imaging. When designing a metal-based PET probe, it is important to achieve ... -
Optimising the relaxivities of Mn2+ complexes by targeting human serum albumin (HSA)
(Royal Society of Chemistry, 2017-07-14)[Abstract] We report two novel macrocyclic ligands based on the 1,4-DO2AM platform (1,4-DO2AM = 2,2′-(1,4,7,10-tetraazacyclododecane-1,4-diyl)diacetamide) and containing two benzyl groups attached either to the nitrogen ...