Results 61 to 70 of about 202,644 (258)
Angewandte Chemie, EarlyView.Imine‐linked 2D covalent organic frameworks incorporating delocalized trioxotriangulene (TOT) neutral radicals were synthesized through complementary routes. Direct incorporation of an amine‐functionalized TOT radical yields a highly crystalline, porous framework (TOT‐COF‐H) with intrinsic semiconducting behavior (σRT = 1.2 × 10−4 S cm−1) and a narrow ...
Paula Escamilla +8 more
wiley +2 more sources
Big Bang Faustiniano, 2015 INTRODUCCIÓN: DE LA DIVISIÓN DE PODERES AL OMBUDSMA Los Estados Modernos sientan, hoy día, sus estructuras políticas en el llamado modelo de Estado social y democrático de Derecho, por el que los poderes públicos no sólo se convierten en los garantes del cumplimiento de las leyes y demás normas jurídicas para dar seguridad al ciudadano; sino que ...
openaire +2 more sources
Geometry‐Controlled Assembly of Self‐Standing Nanorods With Undisturbed Plasmonics
Advanced Science, EarlyView.This study reports a geometry‐driven assembly strategy to vertically align Au@Ag core–shell nanorods on PS beads. This well‐defined architecture enables the preservation of the intrinsic optical response of individual nanorods. Thus, demonstrate a highly reproducible SERS enhancement with exceptional uniformity.
Yoel Negrin‐Montecelo +5 more
wiley +1 more source
Defect‐Guided Assembly of Aperiodic and Flexible Metal–Organic Frameworks From Pre‐Formed Cages
Angewandte Chemie, EarlyView.A cage‐directed strategy is used to program topologically correlated defects and induce aperiodicity in HKUST‐1‐type MOFs. A missing carboxylate group in the linker drives the formation of Cu‐vacancy domains, while Rh(II) cages spatially confine these defects.
Francisco Sánchez‐Férez +12 more
wiley +2 more sources
Electrolyte–Framework Matching in High‐Voltage TEMPO‐COF Cathodes for Lithium Batteries
Advanced Science, EarlyView.TEMPO‐functionalized covalent organic frameworks are investigated as high‐voltage cathodes for lithium batteries. Screening five electrolyte anions identifies lithium difluoro(oxalato)borate (LiDFOB) as the optimal electrolyte, balancing capacity, rate capability, and cycling stability, while buckypaper electrodes achieve high mass loading (40 mg cm−2)
Marilyn Esclance DMello +5 more
wiley +1 more source
Continuous‐Flow Microfluidic Synthesis Enhances C2+ Selectivity for Cu2O Catalysts
Advanced Science, EarlyView.Microfluidic devices are used to prepare Cu2O nanoparticles under laminar flow conditions, which exhibit enhanced selectivity in the CO2‐to‐C2+ reaction due to their nanoporosity and high defect concentration. Cu2O prepared using standard solution methods displays decreased CO2‐to‐C2+ selectivity due to the absence of similar properties. Altogether, we
Carlota Casas +16 more
wiley +1 more source
Deserción a nivel universitario
Ensayos Pedagógicos, 2010 Las características generales de nuestro país ofrecen diversas oportunidades para que la población se sienta motivada a alcanzar una mejor calidad de vida, por lo que año a año son miles los estudiantes que inundan universidades con el objetivo de ...
Mario Castillo Sánchez
doaj
Advanced Energy Materials, EarlyView.A donor–acceptor covalent organic framework is designed as an ambipolar cathode for aluminum‐ion energy storage. The crystalline, microporous architecture enables intrinsic charge transport without conductive additives. Multi‐electron redox activity at donor and acceptor sites supports high capacity, excellent stability, and efficient reversible ...
Cataldo Valentini +11 more
wiley +1 more source
Anales de la Facultad de Medicina, 2014 El tema del Gobierno Universitario es evidentemente el punto central de cualquier ley universitaria; de hecho, la existencia de una ley se basa en la necesidad de normar el gobierno de las Universidades; en tal sentido, las exposiciones a las que asistimos nos dan una idea de la diversidad de perspectivas desde las que se puede tratar este tema.
openaire +3 more sources