Browsing CIQUS-Artigos by Title
Now showing items 373-392 of 408
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The Effect of PEGylation on Multivalent Binding: A Surface Plasmon Resonance and Isothermal Titration Calorimetry Study with Structurally Diverse PEG‐Dendritic GATG Copolymers
(Wiley, 2016-05-19)A general synthetic strategy to polyethylene glycol (PEG)‐dendritic block copolymers of the GATG (gallic acid–triethylene glycol) family is described from commercially available PEG of different molecular weights and ... -
The emergence of order: a closer look on peptide assembly and its complexity
(2021)The self-assembly of peptides and proteins frequently shows structural plasticity depending on subtle alterations. The acquisition of structural data of these peptide assemblies with atomic level precision will be crucial ... -
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 ... -
The rainbow instanton method: A new approach to tunneling splitting in polyatomics
(AIP Publishing, 2012-12-11)A new instanton approach is reported to tunneling at zero-temperature in multidimensional (MD) systems in which a “light particle” is transferred between two equivalent “heavy” sites. The method is based on two concepts. ... -
The role of the secondary structure of helical poly(phenylacetylene)s in the formation of nanoparticles from polymer–metal complexes (HPMCs)
(Royal Society of Chemistry, 2017-08-14)The great importance of the secondary structure (compressed/stretched) of helical poly(phenylacetylene)s (PPAs) in the formation of nanostructures (nanospheres and nanotoroids) by complexation with metal ions of diverse ... -
The ββα fold of zinc finger proteins as a “natural” protecting group. Chemoselective synthesis of a DNA-binding zinc finger derivative
(Royal Society of Chemistry, 2014)We report the selective modification of cysteine residues engineered in peptides that have two additional cysteine residues as part of a Cys2His2 zinc finger motif. The chemoselective modification is achieved, thanks to ... -
Theoretical Kinetics Study of the F(2P) + NH3 Hydrogen Abstraction Reaction
(American Chemical Society, 2014-01-02)The hydrogen abstraction reaction of fluorine with ammonia represents a true chemical challenge because it is very fast, is followed by secondary abstraction reactions, which are also extremely fast, and presents an ... -
A theoretical study of ternary indole–cation–anion complexes
(Royal Society of Chemistry, 2014-09-03)The simultaneous interactions of an anion and a cation with a π system were investigated by MP2 and M06-2X theoretical calculations. Indole was chosen as a model π system for its relevance in biological environments. Two ... -
Thermoelectric properties of heavy-element doped CrN
(AIP Publishing, 2014)CrN was doped with Mo and W to study the effect of heavy elements alloying on its thermoelectric properties. An spontaneous phase segregation into Mo- and W-rich regions was observed even at the lowest concentrations probed ... -
Thickness dependence of exchange coupling in epitaxial Fe3 O4/ CoFe2 O4 soft/hard magnetic bilayers
(APS Physics, 2016)Epitaxial magnetic heterostructures of ( soft − ) Fe 3 O 4 / ( hard − ) CoFe 2 O 4 ( 001 ) have been fabricated with a varying thicknesses of soft ferrite from 5 to 25 nm. We report a change in the ... -
Three-State Switchable Chiral Stationary Phase Based on Helicity Control of an Optically Active Poly(phenylacetylene) Derivative by Using Metal Cations in the Solid State
(American Chemical Society, 2019-05-07)An unprecedented three-state switchable chiral stationary phase (CSP) for high-performance liquid chromatography (HPLC) was developed using a helical poly(phenylacetylene) bearing a chiral (R)-α-methoxyphenylacetic acid ... -
TiO2‐Based Photocatalysis at the Interface with Biology and Biomedicine
(Wiley, 2019)The conversion of sunlight into chemical energy by using photosynthetic machinery is at the heart of nature and life. Scientists have also learned to use light energy to promote a great variety of chemical reactions, most ... -
Toward 2-Thiophyne: ketocarbene versus hetaryne intermediates from 2-(Trimethylsilyl)thiophen-3-yl Triflate
(ACS Publications, 2021)The reaction of 2-(trimethylsilyl)thiophen-3-yl triflate with CsF in the presence of 2,3,4,5-tetraphenylcyclopentadienone affords 4,5,6,7-tetraphenylbenzo[b]thiophene, as it would be expected from the hypothesized generation ... -
Towards Ratiometric Sensing of Amyloid Fibrils In Vitro
(Wiley, 2015)The aggregation of amyloid‐β peptide and its accumulation in the human brain has an important role in the etiology of Alzheimer’s disease. Thioflavin T has been widely used as a fluorescent marker for these amyloid aggregates. ... -
Towards taxane analogues synthesis by dienyne ring closing metathesis
(Royal Society of Chemistry, 2016-10-01)Herein we report the facile construction of taxadiene analogues by ring closing metathesis of dienynes built on a cyclohexenone with a natural configuration at C1 and its further transformation to incorporate most of the ... -
Transition metal catalysis in the mitochondria of living cells
(Nature Publishing Group, 2016-09-07)The development of transition metal catalysts capable of promoting non-natural transformations within living cells can open significant new avenues in chemical and cell biology. Unfortunately, the complexity of the cell ... -
Transition Metal-mediated Reactions in Biological Media
(Swiss Chemical Society, 2018)Transition-metal catalysis has changed the way in which chemical reactions can be accomplished. While most metal-catalyzed reactions have been achieved in organic solvents, recent work has demonstrated that many of these ... -
Transition Metal‐Promoted Reactions in Aqueous Media and Biological Settings
(Wiley, 2021)During the last decade, there has been a tremendous interest for developing non‐natural biocompatible transformations in biologically relevant media. Among the different encountered strategies, the use of transition metal ... -
Transition-Metal-Catalyzed Annulations Involving the Activation of C(sp3)−H Bonds
(Wiley, 2021)The selective functionalization of C(sp3)-H bonds using transitionmetal catalysis is among the more attractive transformations of modern synthetic chemistry. In addition to its inherent atom economy, such reactions open ... -
Tuning coherent-phonon heat transport in LaCoO3/SrTiO3 Superlattices
(ACS Publications, 2021)Accessing the regime of coherent phonon propagation in nanostructures opens enormous possibilities to control the thermal conductivity in energy harvesting devices, phononic circuits, etc. In this paper we show that coherent ...