Browsing QI-Artigos by Issue Date
Now showing items 1-20 of 41
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A novel zinc(II) complex with the ligand 2,20,200-(1,4,7-triazanonane-1,4,7-triyl)- triacetate (NOTA)
(Int Union Crystallography, 2009)The zinc(II) complex with NOTA [2,20 ,200-(1,4,7-triazanonane1,4,7-triyl)triacetate] has previously been synthesized and studied in solution, but was not isolated. The corresponding title ZnII complex pentasodium(I) ... -
A chemosensor for dihydrogenphosphate based on an oxoazamacrocycle possessing three thiourea arms
(Royal Society of Chemistry, 2012)We report a new H-bond macrocyclic chromogenic chemosensor in organic media, H3L, which displayed drastic changes in its UV–vis spectra revealing selectivity for dihydrogenphosphate over other inorganic anions, such as ... -
Synthesis and antimicrobial activities of gold(I) sulfanylcarboxylates
(Springer, 2012)Reaction of NaAuCl4·H2O and thiodiglycol (1:3 molar ratio) with 3-(aryl)-2-sulfanylpropenoic acids, H2 xspa = [x:p = 3-phenyl-, f = 3-(2-furyl)-, t = 3-(2-thienyl)-, o-py = 3-(2-pyridyl)-, Clp = 3-(2-chlorophenyl)-, ... -
Stereoselective Formation of Chiral Metallopeptides
(Wiley, 2012-05-03)Playing into our hands: The achiral bipyridine amino acid fluorenylmethyloxycarbonyl 5‐amino‐3‐oxapentanoic acid (Fmoc‐O1PenBpy‐OH) has been used for the solid‐phase synthesis of metallopeptides. Circular dichroism, molecular ... -
Biomimetic Catalysts for Oxidation of Veratryl Alcohol, a Lignin Model Compound
(MDPI, 2013)Kraft pulp has to be bleached to eliminate the chromophoric structures, which cause a darkening of the pulp. In Nature, an equivalent role is assumed by ligninolytic enzymes such as lignin peroxidases, manganese peroxidases ... -
Polyamine ligand-mediated self-assembly of gold and silver nanoparticles into chainlike structures in aqueousSolution: towards new nanostructured chemosensors
(Wiley, 2013)Polyamine ligands are very versatile compounds due to their water solubility and flexibility. In the present work, we have exploited the binding ability of a polyamine molecular linker (L 2−) bearing different functional ... -
Rhodamine‐appended bipyridine: XOR and OR logic operations integrated in an example of controlled metal migration
(Wiley, 2014)A new bipyridyl derivative 1 bearing rhodamine B as visible fluorophore was designed, synthesized and characterized as a fluorescent and colorimetric sensor for metal ions. Interaction with Cu2+, Zn2+, Cd2+, Hg+, and Hg2+ ... -
Analytical strategies based on quantum dots for heavy metal ions detection
(SPIE Digital Library, 2014)Heavy metal contamination is one of the major concerns to human health because these substances are toxic and retained by the ecological system. Therefore, in recent years, there has been a pressing need for fast and ... -
Programmed stereoselective assembly of DNA-binding helical metallopeptides
(Royal Society of Chemistry, 2014)A flexible and versatile synthetic approach for the construction of water-stable DNA-binding chiral peptide helicates based on the solid phase peptide synthesis (SPPS) methodology is reported -
Copper(II) Complexes of Cyclams Containing Nitrophenyl Substituents: Push–Pull Behavior and Scorpionate Coordination of the Nitro Group
(American Chemical Society, 2015)The three nitrophenyl–cyclam derivatives (nitrocyclams): 1-(4-nitrophenyl)-1,4,8,11-tetraazacyclotetradecane (2), 1-(2-nitrophenyl)-1,4,8,11-tetraazacyclotetradecane (3), and 1-(2,4-dinitrophenyl)-1,4,8,11-tetraazacyclotetradecane ... -
Mimicking Peroxidase Activity by a Manganese(II) Complex Involving a New Asymmetric Tetradentate Ligand Containing Both Amino and Imino Groups
(Hindawi, 2015)The asymmetric ligand (E)-4-bromo-2-(((2-((5-bromo-2-hydroxybenzyl)(methyl)amino)ethyl)imino)methyl)phenol has been prepared by a novel seven-step route. All organic compounds isolated in each step have been characterised ... -
The folding of a metallopeptide
(Royal Society of Chemistry, 2016)We have applied solid-phase synthesis methods for the construction of tris(bipyridyl) peptidic ligands that coordinate Fe(II) ions with high affinity and fold into stable mononuclear metallopeptides. The main factors ... -
High-affinity sequence-selective DNA binding by iridium(III) polypyridyl organometallopeptides
(Royal Society of Chemistry, 2016)We demonstrate the application of solid-phase peptide synthesis methods for the straightforward assembly of polynuclear Ir(III) organometallopeptides, and show that their oligoarginine derivatives exhibit high DNA binding ... -
Membrane-disrupting iridium(III) oligocationic organometallopeptides
(Royal Society of Chemistry, 2016-08-19)A series of oligoarginine peptide derivatives containing cyclometallated iridium(III) units display remarkable cytotoxicity, comparable to that of cisplatin. In vitro studies with unilamellar vesicles support a membrane-disrupting ... -
Synthesis, characterization, and catalytic studies of Mn(III)-Schiff base-dicyanamide complexes: checking the rhombicity effect in peroxidase studies
(Hindawi, 2017)The condensation of 3-methoxy-2-hydroxybenzaldehyde and the diamines 1,2-diphenylendiamine, 1,2-diamine-2-methylpropane and 1,3-propanediamine yielded the dianionic tetradentate Schiff base ligands N,N′-bis(2-hydroxy-4-m ... -
Recruitment of RNA molecules by connexin RNA-binding motifs: Implication in RNA and DNA transport through microvesicles and exosomes
(Elsevier, 2017-04)Connexins (Cxs) are integral membrane proteins that form high-conductance plasma membrane channels, allowing communication from cell to cell (via gap junctions) and from cells to the extracellular environment (via ... -
Sequence‐Specific DNA Recognition with Designed Peptides
(Wiley, 2018)Inspired by natural transcription factors (TFs), researchers have explored the potential of artificial peptides for the recognition of specific DNA sequences, developing increasingly sophisticated systems that not only ... -
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)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 Mn4L26Cl2 2 ... -
Selective G-quadruplex binding by oligoarginine-Ru(dppz) metallopeptides
(Royal Society of Chemistry, 2018)A set of Ru(II) metallopeptides containing the dppz ligand has been synthesized using SPPS methods. Fluorescence titration studies show that those metallopeptides featuring an octaarginine tail display a large binding ...