Search results for "Ceramic"
showing 10 items of 2129 documents
Synthesis and luminescent properties of Mn-doped alpha-tricalcium phosphate
2021
This project has received funding from European Social Fund (project No 09.3.3-LMT-K-712-19-0069) under grant agreement with the Research Council of Lithuania (LMTLT). Institute of Solid State Physics, University of Latvia as the Center of Excellence has received funding from the European Union’s Horizon 2020 Framework Programme H2020-WIDESPREAD-01-2016-2017-TeamingPhase2 under grant agreement No. 739508, project CAMART². The World Federation of Scientists is highly acknowledged for the National Scholarship to AZ. © 2021. This work is licensed under a CC BY-NC-ND 4.0 license.
Catalytic asymmetric conjugate addition of terminal alkynes to β-trifluoromethyl α,β-enones.
2014
The first enantioselective conjugate alkynylation of β-trifluoromethyl α,β-enones using terminal alkynes and a taniaphos–Cu(I) complex as catalyst is described. Ketones bearing a trifluoromethylated propargylic chiral centre in the β-position were obtained with good yields and high enantiomeric excesses (up to 99%).
Highly enantioselective copper(I)-catalyzed conjugate addition of 1,3-diynes to a,b-unsaturated trifluoromethyl ketones
2015
[EN] The conjugate diynylation of a,b-unsaturated trifluoromethyl ketones is carried out in the presence of a low catalytic load (2.5 mol%) of a copper(I)–MeOBIPHEP complex, triethylamine and a terminal 1,3-diyne. Pre-metalation of the terminal 1,3-diyne with stoichiometric or higher amounts of dialkylzinc reagent is not required. The corresponding internal diynes bearing a propargylic stereogenic center are obtained with good yields and excellent enantioselectivities.
Distinct photodynamics of κ-N and κ-C pseudoisomeric iron(ii) complexes
2021
Two closely related FeII complexes with 2,6-bis(1-ethyl-1H-1,2,3-triazol-4yl)pyridine and 2,6-bis(1,2,3-triazol-5-ylidene)pyridine ligands are presented to gain new insights into the photophysics of bis(tridentate) iron(II) complexes. The [Fe(N^N^N)2]2+ pseudoisomer sensitizes singlet oxygen through a MC state with nanosecond lifetime after MLCT excitation, while the bis(tridentate) [Fe(C^N^C)2]2+ pseudoisomer possesses a similar 3MLCT lifetime as the tris(bidentate) [Fe(C^C)2(N^N)]2+ complexes with four mesoionic carbenes. Financial support from the Deutsche Forschungsge-meinschaft [DFG, Priority Program SPP 2102] "Light-controlled reactivity of metal complexes" (BA 4467/7-1, LO 714/11-1, …
Hydrogen activation with perfluorinated organoboranes: 1,2,3-tris(pentafluorophenyl)-4,5,6,7-tetrafluoro-1-boraindene
2013
The perfluorinated boraindene was synthesized and fully characterized. Both computational and crystallographic data show that is antiaromatic. Compound was shown to react reversibly with H2 and to catalyse the hydrogenation of cyclohexene. The mechanism of catalysis was probed experimentally and computationally.
How does diversity affect district innovation systems?Findings from a comparative study of european ceramics
2018
This research applies Nelson’s (1993) primary typology of enterprises to understand why the propensity for innovation varies across ceramics district innovation systems in Europe. We use innovation systems and industrial district theories to explore the innovation capacity of the two most important ceramic tile industrial districts in Europe—Emilia Romagna in Italy and Castellon in Spain. Our analysis shows that, in both districts, innovation plays a decisive role in allowing companies to maintain competitiveness in a globalizing market. However, by comparing the composition of their district innovation systems, our analysis shows that: (i) although levels of competition in both districts a…
Retolació ceràmica urbana dels segles XVIII i XIX : les fàbriques de València
2020
Resum: Les ciutats començaren a retolar amb taulells els noms dels carrers i dels edificis públics, i a numerar les cases, en compliment de la Cèdula reial de 1769 promulgada per Carles III. En aquest article estudiem l’evolució de la retolació urbana al llarg dels segles XVIII i XIX. A partir de diversos casos documentats –Xàtiva, Sogorb, València, Ciutat de Mallorca– i dels taulells i plaques ceràmiques conservats, analitzem aquesta vessant de la taulelleria valenciana.
 
 
 Paraules clau: taulelleria, toponímia urbana, segle XVIII, segle XIX, València
 
 
 
 Abstract: The cities began to signal the names of streets and public buildings with tiles, and t…
Educación artística : revista de investigación
2020
¿Qué es la cerámica? ¿Qué nos enseña de nosotros? ¿Está presente en nuestro entorno próximo y lo dota de identidad? ¿Qué de interés nos puede ofrecer en el ámbito educativo de primaria? ¿Qué campos de la expresión artística puede favorecer? Son algunas de las preguntas y reflexiones planteadas que motivan este ejercicio y tratamos de averiguar. Los alumnos de tercero de Magisterio realizan dos piezas cerámicas utilitarias de distinto método de conformación y acabado, reflexionando sobre la educación artística, la creación y los procesos propios de la cerámica. Para elaborarlas, se ha completado un proceso íntegro cerámico; partiendo de bocetos previos con una base gráfica tanto de forma com…
Hybrid materials with nanoscopic anion-binding pockets for the colorimetric sensing of phosphate in water using displacement assays
2008
Mesoporous amino-functionalised solids containing certain dyes have been used as suitable anion hosts in displacement assays for the colorimetric signalling of phosphate in water. Amoros del Toro, Pedro Jose, Pedro.Amoros@uv.es
Reduction of tris(benzene-1,2-dithiolate)molybdenum(VI) by hydroxide ions in dry tetrahydrofuran solution.
2001
Tris(benzene-1,2-dithiolate)molybdenum(VI) reacts rapidly and quantitatively with tetrabutylammonium hydroxide to yield the corresponding Mo(V) and Mo(IV) complexes and hydrogen peroxide; the reaction has been executed in dry tetrahydrofuran where the reaction rate shows a fair dependence on complex and OH2 concentrations. Cervilla Avalos, Antonio, Antonio.Cervilla@uv.es ; Perez Pla, Francisco, Francisco.Perez@uv.es ; Llopis Jover, Elisa, Elisa.Llopis@uv.es