Results 91 to 100 of about 343,291 (192)

SORCIÓN DE CROMO UTILIZANDO AQUENIO DE PLATANUS X HISPÁNICA

Avances en Ciencias e Ingeniería, 2018
Debido a su alta toxicidad, el cromo debe eliminarse de las aguas residuales industriales que lo contienen antes de descargarlas en los cuerpos acuíferos.
Silvia I. García, Liz Candia, María I. Frascaroli, Juan C. González   +3 more
doaj  

Relative influence of noncovalent interactions on the melting points of a homologous series of 1,2-dibromo- 4,5-dialkoxybenzenes [PDF]

, 2013
Crystal structures are presented for two members of the homologous series of 1,2-dibromo-4,5-dialkoxybenzenes, viz. those with decyloxy and hexadecyloxy substituents, namely 1,2-dibromo-4,5-bis(decyloxy)benzene, C26H44Br2O2, (II), and 1,2-dibromo-4,5-bis(
Alborés, Pablo, Baggio, Ricardo Fortunato, Cecchi, Florencia, Cukiernik, Fabio Daniel, Fonrouge, Ana   +4 more
core   +3 more sources

Induced‐Fit Recognition by a Calixarene–Pyrene Conjugate for Single‐ and Dual‐Wavelength Fluorescence Sensing in Water

Chemistry – A European Journal, EarlyView.
A sulfonatocalix[4]arene–pyrene conjugate functions as a fluorescence chemosensor for the optical detection of biorelevant analytes in water. Its photoinduced electron transfer (PET) response is triggered by an induced‐fit recognition mechanism. Noncovalent assembly with an additional dye affords dual‐color ratiometric signaling via competitive PET ...
Joana N. Martins, Márcia Pessêgo, Luis Garcia‐Rio, João Carlos Lima, Nuno Basílio   +4 more
wiley   +1 more source

Computational Strategies for Predicting Excited‐State Energies in Eu3+ Down‐Shifting Spectral Converters for Photovoltaic Devices

ChemPhysChem, EarlyView.
A computational strategy to compute the energy of the triplet excited state in europium‐based coordination complexes is presented. This method allows for in silico screening of new systems with can be used as photosensitizers in solar cell‐based technologies.
Laura Sánchez‐Muñoz, Daniel Aravena, Jordi Cirera, Pere Alemany   +3 more
wiley   +1 more source

Unlocking the Continuous Flow Asymmetric Hydrogenation of Olefins Through the Development of a Non‐Deactivating Immobilized Iridium Catalyst

Angewandte Chemie, Volume 138, Issue 6, 2 February 2026.
We have developed stable, robust, and reusable heterogeneous metal catalysts for an efficient continuous flow asymmetric hydrogenation (AH) of a variety of olefins, far beyond the typical benchmark AH. The products are produced continuously over long periods of time with high catalytic performance (up to 99% ee).
Jorge Faiges, Nicola Zanda, Patricia Llanes, Miquel A. Pericàs, Oscar Pàmies, Montserrat Diéguez   +5 more
wiley   +2 more sources

Computational Modeling of Tensile Stress Effects on the Structure and Stability of Prototypical Covalent and Layered Materials

Nanomaterials, 2019
Understanding the stability limit of crystalline materials under variable tensile stress conditions is of capital interest for technological applications. In this study, we present results from first-principles density functional theory calculations that
Hocine Chorfi, Álvaro Lobato, Fahima Boudjada, Miguel A. Salvadó, Ruth Franco, Valentín G. Baonza, J. Manuel Recio   +6 more
doaj   +1 more source

Thermal Stability of Self-Assembled Monolayers of n-Hexanethiol on Au(111)-(1 × 1) and Au(001)-(1 × 1) [PDF]

, 2017
Thermal desorption in an ultrahigh vacuum of n-hexanethiol (C6T) self-assembled monolayers (SAMs) prepared from ethanolic solutions on Au(111) and Au(001) unreconstructed surfaces was investigated by X-ray photoelectron spectroscopy.
Afeefy H. Y., Gustavo Ruano, Julio Ferrón, Lucila J. Cristina, Moulder J. F., Roberto Salvarezza   +5 more
core   +2 more sources

Electrochemical Water Oxidation Mechanisms Involving Macrocyclic Copper(II) Complexes: Ligand Ring Size Effects on Catalytic Cycles

ChemPhysChem, EarlyView.
The ring size of the ligand strongly influences electronic properties, steric effects, and coordination modes of key intermediates. Both catalysts show similar energy barriers for OO bond formation, but [Cu(12‐TMC)]2+ exhibits more complex mechanisms due to ligand reorganization.
João Pedro C. S. Neves, Roberto Rivelino, Tiago Vinicius Alves, Vitor H. Menezes da Silva   +3 more
wiley   +1 more source

Selective Hydrodemethylation of Methylalkylbenzenes on Potassium Hydride

Angewandte Chemie, Volume 138, Issue 6, 2 February 2026.
Selective catalytic hydrodealkylation of methylalkylbenzenes on carbon‐supported potassium hydride is reported. The reaction exhibits a reactivity trend of 1° ∼ 2° ∼ 3° < CH3, which is opposite to traditional dealkylation and hydrodealkylation. DFT calculations on the (001) facet of KH with ortho‐ethyltoluene suggest that selectivity is controlled by ...
Puyang Tian, Marc Figueras‐Valls, Fei Chang, Francesc Viñes, Francesc Illas, Alexey Fedorov   +5 more
wiley   +2 more sources

OSCILACIONES DE UNA CUERDA CON MASAS CONCENTRADAS

Anales (Asociación Física Argentina), 2006
En este trabajo se estudian teórica y experimentalmente las oscilaciones de una cuerda homogénea, fija en sus dos extremos, sobre la que se han colocado un número finito de masas concentradas.
B. Gomez, C. Repetto, S. Stia, R. Welti
doaj