Listar Reactividade Química e Fotorreactividade (REACT!) por título
Mostrando ítems 64-83 de 114
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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 ... -
Paramagnetic lanthanide chelates for multicontrast MRI
(Royal Society of Chemistry, 2016-06-02)[Abstract] The preparation of a paramagnetic chelator that serves as a platform for multicontrast MRI, and can be utilized either as a T1-weighted, paraCEST or 19F MRI contrast agent is reported. Its europium(III) complex ... -
Phosphate and polyphosphate anion recognition by a dinuclear copper(ii) complex of an unsymmetrical squaramide
(Royal Society of Chemistry, 2019-05-29)[Abstract] In the search for receptors suitable for the recognition of phosphate or polyphosphate anions, a new unsymmetrical squaramide-based ligand bearing dipicolylamine (dpa) and ethylpiperazine units (L) was designed ... -
Photo-Immobilization of Proteins on Carbons
(Elsevier, 2019-11-13)[Abstract] The photofunctionalization of three different carbons with two proteins was studied at room temperature. Water solutions of bovine serum albumin, BSA, and α-amylase, AA, were photolyzed at 21 °C in the presence ... -
Plastic Debris in Lakes and Reservoirs
(Springer Nature, 2023)[Abstract] Plastic debris is thought to be widespread in freshwater ecosystems globally1. However, a lack of comprehensive and comparable data makes rigorous assessment of its distribution challenging2,3. Here we present ... -
Preparation, Characterization and Testing of a Bulky Non-supported Photocatalyst for Water Pollution Abatement
(Elsevier, 2023-03-15)[Abstract] An innovative bulky photocatalyst for water decontamination has been developed. The semiconductor (TiO2) is homogeneously distributed in an aggregating material through the whole piece. This design prevents the ... -
Receptor versus counterion: capability of N,N′‐Bis(2‐aminobenzyl)‐diazacrowns for giving endo‐ and/or exocyclic coordination of ZnII
(Wiley, 2007-03-20)[Abstract] The structure of ZnII complexes with receptors L1 and L2[L1 = N,N′‐bis(2‐aminobenzyl)‐1,10‐diaza‐15‐crown‐5 and L2 = N,N′‐bis(2‐aminobenzyl)‐4,13‐diaza‐18‐crown‐6] was studied both in the solid state and in ... -
Recognition of AMP, ADP and ATP through cooperative binding by Cu(II) and Zn(II) complexes containing urea and/or phenylboronic acid moieties
(MDPI, 2018)[Abstract] We report a series of Cu(II) and Zn(II) complexes with different ligands containing a dipicolyl unit functionalized with urea groups that may contain or not a phenylboronic acid function. These complexes were ... -
Reinforced Ni(ɪɪ)-Cyclam Derivatives as Dual ¹H/¹⁹F MRI Probes
(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 ... -
Relevance of Palladium to Radiopharmaceutical Development Considering Enhanced Coordination Properties of TE1PA
(Wiley, 2022-06-10)[Abstract] The limited use of palladium-103 and -109 radionuclides for molecular radiotherapy is surely due to the lack of appropriate ligands capable of fulfilling all criteria required for application in nuclear medicine. ... -
Removal of Emerging Pollutants by a 3-Step System: Hybrid Digester, Vertical Flow Constructed Wetland and Photodegradation Post-treatments
(Elsevier, 2022-06-22)[Abstract] The removal of emerging pollutants from municipal wastewater was studied for the first time using a three-step pilot-scale system: 1) hybrid digester (HD) as first step, 2) subsurface vertical flow constructed ... -
Removal of Paracetamol in the Presence of Iron(III) Complexes of Glutamic and Lactic Acid in Aqueous Solution Under NUV Irradiation
(Elsevier, 2021-01-05)[Abstract] Low concentrations of drugs and their metabolites occurring on the aquatic environment are of significant concern due to their potential effects. This work reports on the removal from aqueous solution, of ... -
Rigidified Derivative of the Non-macrocyclic Ligand H₄OCTAPA for Stable Lanthanide(III) Complexation
(American Chemical Society, 2022-03-11)[Abstract] The stability constants of lanthanide complexes with the potentially octadentate ligand CHXOCTAPA4–, which contains a rigid 1,2-diaminocyclohexane scaffold functionalized with two acetate and two picolinate ... -
Room temperature molecular up conversion in solution
(Springer Nature, 2016-06-15)[Abstract] Up conversion is an Anti-Stokes luminescent process by which photons of low energy are piled up to generate light at a higher energy. Here we show that the addition of fluoride anions to a D2O solution of a ... -
Selective growth inhibition of cancer cells with doxorubicin-loaded CB[7]-modified iron-oxide nanoparticles
(Royal Society of Chemistry, 2017-05-03)[Abstract] Cucurbit[7]uril-modified iron-oxide nanoparticles (CB[7]NPs) were loaded with doxorubicin hydrochloride (Dox) and tested as a drug delivery system. Dox was found to interact with the carbonyl-rich rims of the ... -
Self‐aggregated dinuclear lanthanide(III) complexes as potential bimodal probes for magnetic resonance and optical imaging
(Wiley, 2013-08-26)[Abstract] Homodinuclear lanthanide complexes (Ln=La, Eu, Gd, Tb, Yb and Lu) derived from a bis‐macrocyclic ligand featuring two 2,2′,2′′‐(1,4,7,10‐tetraazacyclododecane‐1,4,7 triyl)triacetic acid chelating sites linked ... -
Sensing uranyl(VI) ions by coordination and energy transfer to a luminescent europium(III) complex
(Wiley, 2018-06-13)[Abstract] The release of uranyl(VI) is a hazardous environmental issue, with limited ways to monitor accumulation in situ. Here, we present a method for the detection of uranyl(VI) ions through the utilization of a unique ... -
Simulated Sunlight Photodegradation of 2-Mercaptobenzothiazole by Heterogeneous Photo-Fenton Using a Natural Clay Powder
(Elsevier, 2018-02-24)[Abstract] The efficiency of 2-mercaptobenzothiazole (MBT) degradation by heterogeneous photo-Fenton process using local natural clay powder (NCP) is described. Experiments were conducted at natural pH with a batch reactor ...