Química Inorgànica i Orgànica: Enviaments recents
Ara mostrant els elements 21-40 de 1016
Sequential uncaging with green light can be achieved by fine-tuning the structure of a dicyanocoumarin chromophore
We report the synthesis and photochemical properties of a series of dicyanocoumarinylmethyl (DEAdcCM)- and dicyanocoumarinylethyl (DEAdcCE)-based photocages of carboxylic acids and amines with absorption maximum around 500 ...
NMR approaches to study proteins integrating globular and disordered domains: the case of c-Src
Nuclear Magnetic Resonance is one of the most versatile structural biology tools. Its unique capacities remain unchallenged by the advances in other techniques, experimental, like cryo-electron microscopy, or computational, ...
Production, characterization and biotechnological potential of lipopeptide biosurfactants from a novel marine Bacillus stratosphericus strain FLU5
This work aimed to study the potential of a newly marine bacterium, Bacillus stratosphericus FLU5, to produce an efficient surface active agent BS-FLU5. Biosurfactant production was examined on different carbon sources ...
Substituent Effects in the Photophysical and Electrochemical Properties of Meso-Tetraphenylporphyrin Derivatives
Porphyrins were identified some years ago as a promising, easily accessible, and tunable class of organic photoredox catalysts, but a systematic study on the effect of the electronic nature and of the position of the ...
Theoretical Modeling of the Ligand-Tuning Effect over the Transition Temperature in Four-Coordinated Fe-II Molecules
Spin-crossover molecules are systems of great interest due to their behavior as molecular level switches, which makes them promising candidates for nanoscale memory devices, among other applications. In this paper, we ...
Two-, three-, and four-component magnetic multilayer onion nanoparticles based on iron oxides and manganese oxides
Magnetic multilayered, onion-like, heterostructured nanoparticles are interesting model systems for studying magnetic exchange coupling phenomena. In this work, we synthesized heterostructured magnetic nanoparticles composed ...
Fine-tuning the [Pi]-[Pi]. Aromatic interactions in peptides: somatostatin analogues containing mesityl alanine
Going through the motions: Somatostatin analogues having greater conformational rigidity than somatostatin have been prepared by substituting Phe residues in the native sequence with mesityl alanine (Msa; see structure). ...
Modulation of single-molecule magnet behaviour via photochemical [2+2] cycloaddition
The first example of phototunable SMMs has been reported. Upon UV irradiation, variations of the coordination sphere around Dy(III) ions actually affect the magnetic behaviour of the compound via [2+2] cycloaddition reaction, ...
Unravelling of a [High Spin Low Spin] ↔ [Low Spin High Spin] Equilibrium in Spin-Crossover Iron(II) Dinuclear Helicates Using Paramagnetic NMR Spectroscopy
Spin-crossover between high-spin (HS) and lowspin (LS) states of selected transition metal ions in polynuclear and polymeric compounds is behind their use as multistep switchable materials in breakthrough electronic and ...
Role of rare earth sites and vacancies in the anomalous compression of modulated scheelite tungstates
X-ray powder diffraction experiments at high pressures combining conventional sources and synchrotron radiation, together with theoretical simulations have allowed us to study the anomalous compression of the entire ...
Stereoselective synthesis of protected peptides containing an anti β‐Hydroxy tyrosine
Protected peptides containing an anti b-hydroxy tyrosine are synthesized in a straightforward and highly efficient manner through the direct and stereoselective addition of N-azidoacetyl-4-isopropyl-1,3-thiazolidine-2-thione ...
Distributive Nd-to-Yb Energy Transfer within Pure [YbNdYb] Heterometallic Molecules
Facile access to site-selective hetero-lanthanide molecules will open new avenues in the search of novel photophysical phenomena based on Ln-to-Ln′ energy transfer (ET). This challenge demands strategies to segregate ...
Antiferromagnetic interactions in copper(II) mu-Oxalato dinuclear complexes: The role of the counterion
We report the preparation, crystal structure determination, magnetic properties and DFT calculations of five oxalato-bridged dicopper(II) complexes of formula [Cu-2(bpy)(2-)(H2O)(2)(C2O4)](CF3SO3)(2) (1), [Cu-2(bpy)(2)(C ...
Rational Tuning of the Reactivity of Three-Membered Heterocycle Ring Openings via SN2 Reactions
The development of small-molecule covalent inhibitors and probes continuously pushes the rapidly evolving field of chemical biology forward. A key element in these molecular tool compounds is the "electrophilic trap" that ...
Deactivation routes in gold(I) polypyridyl complexes: internal conversion Vs fast intersystem crossing
An electronic spectral and photophysical characterization of three gold(I) complexes containing heterocyclic chromophores differing in the number and arrangement of pyridine rings (pyridine, bipyridine and terpyridine, ...
DNA-interacting properties of two analogous square-planar cis-chlorido complexes: copper versus palladium
Two square-planar coordination compounds, namely [Cu(CPYA)Cl2] (1) and [Pd(CPYA)Cl2] (2), were prepared from the ligand 4-chloro-N-(pyridin-2-ylmethyl)aniline (CPYA) and two chloride salts, and were fully characterized, ...
On the origin of the selectivity of plasmidic H-NS towards horizontally acquired DNA: Linking H-NS oligomerization and cooperative DNA binding
The nucleoid-associated protein H-NS is a global modulator of the expression of genes associated with adaptation to environmental changes. A variant of H-NS expressed in the R27 plasmid was previously shown to selectively ...
Magnetic and optical studies of a new family of multidimensional and multiproperty PO-lanthanide(iii) derived systems
A new family of lanthanide compounds has been synthesized using 1,2-bis(diphenylphosphino)ethane dioxide (dppeO2) as an O-donor ligand through the phosphoryl group to lanthanide(III) cations and structurally, magnetically ...
Two-electron connection between tryptophan and phenylalanine/tyrosine residues: linked, constrained and stapled peptides through C-H activation processes
Natural peptides show high degrees of specificity in their biological action. However, their therapeutical profile is severely limited by their conformational freedom and metabolic instability. Stapled peptides constitute ...
Zn(II) Byproduct Enhances the Cu-Catalyzed Cross-Coupling of Bromozinc Difluorophosphonate with Iodobenzoates: A DFT Study
The copper-catalyzed cross-coupling of bromozinc difluorophosphonate with iodobenzoates has been studied with the DFT methodology in order to understand the experimentally observed reactivity. The directing carboxylate ...
