Results 11 to 20 of about 5,386 (129)

Substrate-Selective Temperature-Controlled Synthesis of Thiophene Derivatives at Interfaces. [PDF]

Angew Chem Int Ed Engl
The deposition of a dithiophene derivative on Ag(111) at room temperature followed by annealing gives rise to molecular wires, whereas the adsorption of the same precursor on a hot substrate affords the formation of benzotrithiophene species. Abstract The temperature‐controlled transformation of organic molecules at interfaces is an incipient yet ...
Pérez-Elvira E, Barragán A, Vicent DJ, Jóver Ó, Gallardo A, García-Frutos A, Černa L, Lauwaet K, Santos J, Perles J, Gallego JM, Miranda R, Urgel JI, Björk J, Di Giovannantonio M, Martín N, Écija D.   +16 more
europepmc   +3 more sources

Unconventional Fast Room Temperature Synthesis of Covalent Organic Framework Single Crystals Unveiling Precise Structural Insights. [PDF]

Angew Chem Int Ed Engl
This work presents a fast, room‐temperature synthesis of single‐crystalline, highly fluorinated 2D covalent organic frameworks (COFs). We achieved the growth of 3‐micron‐long COF rods, enabling the precise study of their mechanical properties and aggregation states.
Jiménez-Duro M, Martínez-Fernández M, Cabrera-Trujillo JJ, Osuna E, Humanes MF, Gómez-Navarro C, Gómez-Herrero J, Zamora F, Segura JL.   +8 more
europepmc   +3 more sources

Poly(Ionic) Liquid-Enhanced Ion Dynamics in Cellulose-Derived Gel Polymer Electrolytes. [PDF]

ChemSusChem
Advancing Energy Storage: Gel Polymer Electrolytes with Promising Potential Gel polymer electrolytes (GPEs) incorporating methyl cellulose and a range of ionic/polymeric achieved Li+ transference numbers comparable to traditional liquid electrolytes.
Paiva TG, Klem M, Silvestre SL, Coelho J, Alves N, Fortunato E, Cabrita EJ, Corvo MC.   +7 more
europepmc   +2 more sources

Caracterización de un Andisol de la cuenca alta de la quebrada Santa Elena, Oriente Antioqueño, Colombia.

Revista de la Facultad de Ciencias, 2017
Se caracterizó detalladamente un Andisol derivado de ceniza volcánica de la cuenca alta de la quebrada Santa Elena, Oriente Antioqueño (Colombia), con el fin de realizar en él otros estudios más detallados de pedogénesis.
Nicolás Pérez Echavarría, Daniel Francisco Jaramillo Jaramillo, Orlando Simon Ruiz Villadiego, Luis Norberto Parra Sánchez   +3 more
doaj   +1 more source

Asociación de frutales de limón persa (Citrus latifolia) y palma de coco (Cocos nucifera L.) con el aporte de materia seca por cultivos anuales

Revista Iberoamericana de Bioeconomía y Cambio Climàtico, 2019
El objetivo es implementar un sistema de cultivos de maíz y frijol intercalados con frutales de limón persa y palma de coco. El trabajo se estableció en octubre de 2017, en el Hatillo, municipio de la Antigua, Veracruz, con árboles de frutales de limón ...
Laureano Rebolledo-Martínez, Dr., Juan Valente Megchún-García, Dr., Andrés Rebolledo-Martínez, Dr., Dulce María Orozco-Corona   +3 more
doaj   +1 more source

Tunable Oxygen Connectivity in Carbaporphyrinoid Polymers on Metal Surfaces

Angewandte Chemie, EarlyView.
Hydroxyl‐functionalized dicarbaporphyrinoid polymers synthesized on Au(111) enable tunable oxygen‐mediated connectivity under UHV conditions. Thermal activation yields one‐dimensional hydroxyl‐terminated polymers that can selectively evolve into either covalently‐linked dibenzo‐p‐dioxane architectures through intermolecular C–O–C coupling or two‐fold ...
Alberto Martínez‐Bajo, Maxence Urbani, Ana Barragán, Óscar Jover, Elena Pérez‐Elvira, Ilaria Tomei, Claudio Goletti, Alejandro Jiménez‐Martín, Aurelio Gallardo, Koen Lauwaet, David Écija, Diego Soler‐Polo, Marco Di Giovannantonio, Tomás Torres, José I. Urgel   +14 more
wiley   +2 more sources

Degradable Ureido-Polycarbonate Block Copolymers with a Complex UCST Thermoresponse. [PDF]

Macromol Rapid Commun
Amphiphilic block copolymers with degradable ureido‐functionalized polycarbonate segments self‐assemble into spherical micelles in water, exhibiting an intriguing upper critical solution temperature (UCST) behavior. Upon heating, these micelles swell, collapse, and reorganize into highly hydrated condensates that mimic polymeric nanogels.
Martin-Martin J, Abad M, Lopez de Pariza X, Ezquerra TA, Nogales A, Sardon H, Sebastián V, Oriol L, Piñol M.   +8 more
europepmc   +2 more sources

Variabilidad de δ13C y δ15N en suelo y hojarasca de cacao en El Oro, Ecuador

Terra Latinoamericana, 2019
El cacao aporta niveles significativos de carbono (C) y nitrógeno(N) por las hojarascas; el cambio de manejo agronómico ocasiona variación en los contenidos de estos elementos en el suelo. El objetivo fue evaluar las variaciones de los isotopos de δ13C y
Salomón Barrezueta Unda, Antonio Paz González, Ángel Eduardo Luna Romero, Edwin Jaramillo Aguilar   +3 more
doaj   +1 more source

Leaf litter accumulation and release of nutrients to the soil in Pinus tropicalis Morelet stands

Revista Cubana de Ciencias Forestales, 2021
The research was carried out in the Sumidero Silvicultural Unit, belonging to Empresa Agroforestal Minas, with the objective of evaluating the contribution of leaf litter to the soil in stands of Pinus tropicalis Morelet.
Darien Miranda Pérez, Katiuska Ravelo Pimentel, Pedro Alejandro Vigil García, Maryory Solana Díaz López   +3 more
doaj  

Driving Multi‐Step Regioselectivity in On‐Surface Polymer Synthesis by Molecular Coverage

Angewandte Chemie, Volume 137, Issue 48, November 24, 2025.
Regioselective polymerization of dicyclopentaanthracene on Au(111) can be controlled by tuning molecular coverage. Low coverage yields 1D polymers, medium coverage produces quasi‐1D staircase polymers, and higher coverage drives 2D porous networks.
Kalyan Biswas, Alba García‐Frutos, Berta Álvarez, Marco Lozano, Ana Barragán, Jesús Janeiro, Jesús Bello‐García, Diego Soler‐Polo, Koen Lauwaet, José M. Gallego, Dolores Pérez, Rodolfo Miranda, José I. Urgel, Pavel Jelínek, Diego Peña, David Écija   +15 more
wiley   +2 more sources