Results 61 to 70 of about 150,397 (174)

Nitrogen-Rich Multinuclear Ferrocenophanes as Multichannel Chemosensor Molecules for Transition and Heavy-Metal Cations

open access: yesSensors, 2014
[m.n] Multinuclear ferrocenophanes prepared by aza-Wittig reaction of bisiminophosphoranes derived from 1,1'-diazidoferrocene and isophthaladelhyde or 2,5-diformylthiophene, behave as efficient electrochemical and chromogenic chemosensor molecules for ...
Antonia Sola   +3 more
doaj   +1 more source

Combined In‐Solution and On‐Surface Synthesis of a Fully Fused Cross‐Shaped Phthalocyanine Pentamer

open access: yesAngewandte Chemie International Edition, EarlyView.
A phthalocyanine (Pc) pentamer was obtained through the combination of in‐solution and on‐surface synthesis under ultra‐high vacuum conditions. The resulting Pc‐based nanostructure presents an exact 4:1 ratio of two different metal ions with precise positional control.
Luis M. Mateo   +8 more
wiley   +1 more source

Métodos alternativos ao uso de insecticidas [PDF]

open access: yes, 2013
Titulación: Licenciatura en Química -- Materia: Química orgánica agrícolaEsta unidade didáctica inclúese na materia de Química Orgánica Agrícola que se imparte no quinto curso da licenciatura en Química e supón unha carga lectiva de 60 horas.
Seco Castro, José Manuel
core  

The trypanocidal activity of the alkaloid oliverine involves inhibition of DNA synthesis [PDF]

open access: yes, 2010
The Trypanosoma cruzi parasite is an etiologic agent of the American trypanosomiasis called Chagas disease. This pathology affects more than 24 million persons and represents one of the most important public health problems in Latin America.
Garro, Hugo Alejandro   +5 more
core  

Substrate‐Selective Temperature‐Controlled Synthesis of Thiophene Derivatives at Interfaces

open access: yesAngewandte Chemie, Volume 138, Issue 6, 2 February 2026.
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 ...
Elena Pérez‐Elvira   +16 more
wiley   +2 more sources

A New Approach to the Synthesis of Benzo[b]naphtho[2,3-b]furan-6,11-diones and 2-Benzyl-3-hydroxynaphthalene-1,4-diones

open access: yesSynOpen, 2017
Here we describe modified syntheses of o-acetylbenzoic acids­ and o-acetylphenylacetic acids by Heck palladium-catalysed aryl­ation of n-butyl vinyl ether with o-iodobenzoic acids or with o-iodo­phenylacetic acids, respectively.
Jose C. Barcia   +6 more
doaj   +1 more source

Guía de Evaluación: Química Orgánica [PDF]

open access: yes, 2015
Guía de evaluación del ...
Avila Cordoba Liliana Ivette
core  

Effective acetalization of furfural catalyzed by Fe‐ and Co‐oxalates: impact of alcohols structure on products composition

open access: yesBiofuels, Bioproducts and Biorefining, EarlyView.
Abstract Fe‐, Co‐, and FeCo‐oxalates supported on silica gel (5 wt% metal load) were synthesized, characterized, and tested for the first time in solvent‐free furfural (FF) acetalization with C1–C8 alcohols at 70–170 °C under both conventional and microwave (MW)‐assisted conditions. The interaction of FF with linear C1–C4 alcohols yielded pincer‐shaped
Alexander Pokutsa   +3 more
wiley   +1 more source

Allylsilanes in the synthesis of three to seven membered rings: the silylcuprate strategy

open access: yesBeilstein Journal of Organic Chemistry, 2007
Addition of low order phenyldimethylsilylcyanocuprates to allenes followed by "in situ" reaction of the intermediate silylcuprate with electrophiles ("the silylcuprate strategy") provides new routes for the synthesis of functionalised allylsilanes, which
Asunción Barbero   +2 more
doaj   +1 more source

Desarrollo y caracterización de un nuevo esmalte antideslizante de textura lisa y de fácil limpieza para baldosas de gres porcelánico

open access: yesBoletín de la Sociedad Española de Cerámica y Vidrio, 2016
Dada la problemática que presentan los esmaltes antideslizantes convencionales, los cuales poseen una rugosidad superficial que dificulta la limpieza de la superficie de la pieza, se ha diseñado un esmalte antideslizante de naturaleza vitrocerámica que ...
E. Barrachina Albert   +4 more
doaj   +1 more source

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