Listar GI-REACT! - Artigos por título
Mostrando ítems 38-57 de 113
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endo- versus exo-Cyclic coordination in copper complexes with methylthiazolylcarboxylate tacn derivatives
(Royal Society of Chemistry, 2019-05-17)[Abstract] Three tacn (1,4,7-triazacyclononane)-based ligands substituted by methylthiazolylcarboxylate (tha) and/or methylthiazolyl (th) arms have been examined for copper complexation with the aim to study the impact of ... -
Enhanced Photocatalytic Degradation of the Imidazolinone Herbicide Imazapyr upon UV/Vis Irradiation in the Presence of CaᵪMnOᵧ-TiO₂ Hetero-Nanostructures: Degradation Pathways and Reaction Intermediates
(MDPI, 2020-05-08)[Abstract] The determination of reaction pathways and identification of products of pollutants degradation is central to photocatalytic environmental remediation. This work focuses on the photocatalytic degradation of the ... -
Europium(III) Macrocyclic Chelates Appended with Tyrosine-based Chromophores and Di-(2-picolyl)amine-based Receptors: Turn-On Luminescent Chemosensors Selective to Zinc(II) Ions
(Wiley, 2020-01-22)[Abstract] Zinc ions play an important role in many biological processes in the human body. To selectively detect Zn²⁺, two EuDO3A‐based complexes (DO3A=1,4,7,10‐tetraazacyclododecane‐1,4,7‐tricarboxylic acid) appended ... -
Exceptionally inert lanthanide(III) PARACEST MRI contrast agents based on an 18-membered macrocyclic platform
(Wiley, 2015-12-14)[Abstract] We report a macrocyclic ligand based on a 3,6,10,13-tetraaza-1,8(2,6)-dipyridinacyclotetradecaphane platform containing four hydroxyethyl pendant arms (L1) that forms extraordinary inert complexes with Ln3+ ions. ... -
Expanding the Ligand Classes Used for Mn(II) Complexation: Oxa-aza Macrocycles Make the Difference
(MDPI, 2021-03-10)[Abstract] We report two macrocyclic ligands based on a 1,7-diaza-12-crown-4 platform functionalized with acetate (𝑡O2DO2A²⁻) or piperidineacetamide (𝑡O2DO2AMᴾⁱᵖ) pendant arms and a detailed characterization of the ... -
Face-Fusion of Icosahedral Boron Hydride Increases Affinity to γ‐Cyclodextrin: closo,closo‐[B₂₁H₁₈]⁻ as an Anion with Very Low Free Energy of Dehydration
(Wiley, 2020-03-12)[Abstract] The supramolecular recognition of closo,closo‐[B₂₁H₁₈]⁻ by cyclodextrins (CDs) has been studied in aqueous solution by isothermal titration calorimetry and nuclear magnetic resonance spectroscopy. These solution ... -
Gd3+-based magnetic resonance imaging contrast agent responsive to Zn2+
(American Chemical Society, 2015-10-15)[Abstract] We report the heteroditopic ligand H5L, which contains a DO3A unit for Gd3+ complexation connected to an NO2A moiety through a N-propylacetamide linker. The synthesis of the ligand followed a convergent route ... -
Gold Nanoparticles as Colorimetric Sensors for the Detection of DNA Bases and Related Compounds
(MDPI, 2020-06-23)[Abstract] Results regarding interaction of colloidal gold solutions with nucleobases, including uracil (U), as well as its sulfur derivatives, 2-thiouracil (2TU) and 4-thiouracil (4TU), cytosine (C), adenine (A), and ... -
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 ...