Results 91 to 100 of about 5,326,384 (292)

O uso de 2,2,2-tricloro-1-ariletanonas como agentes benzoilantes [PDF]

, 1987
Dissertação (mestrado) - Universidade Federal de Santa Catarina. Centro de Ciencias Fisicas e MatematicasA preparação de diversas amidas e hidrazidas pela reação de 2,2,2-tricloro-1-ariletanona com diferentes nucleófilos demostrou ser um processo ...
Rebelo, Ricardo Andrade
core  

Synthesis and characterization of a pyridinium IL-tagged Schiff base Pd(II)-complex: An efficient catalyst for the Suzuki reaction at room temperature under aerobic conditions

Results in Chemistry
To address some drawbacks associated with the Suzuki reaction herein we report a new pyridinium IL-tagged Schiff base Pd(II)-complex. First pyridinium IL was synthesized and condensed with salicylaldehyde to prepare a new IL-tagged Schiff base which on ...
Pranesh Rai, Biswajit Sinha
doaj   +1 more source

Selective detection of fluoride based on a pyridinium n-phenolate-calix[4]pyrrole displacement assay: an undergraduate laboratory experiment

Química Nova, 2014
A two-step experiment is proposed for a third year class in experimental organic chemistry. Over a period of five weeks, the students synthesized calix[4]pyrrole, a receptor that is highly selective for fluoride, and a pyridinium N-phenolate dye ...
Karina Mannrich, Marcelo Silva, Leandro G. Nandi, Celso R. Nicoleti, Vanderlei G. Machado   +4 more
doaj   +1 more source

O Papel da agua (ou a sua ausencia) na formação de compostos ricos em energia nos sistemas biologicos [PDF]

, 1997
Tese (Mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas.Uma das questões mais fascinantes que já foram levantadas pelos pesquisadores nas últimas décadas refere-se ao estudo dos compostos ricos em energia, tais ...
Machado, Vanderlei Gageiro
core  

Porous Carbon Materials for Carbon Dioxide Capture

Carbon Energy, EarlyView.
This work aims to address the current status and challenges associated with the regulation of pore structures, as well as the influence of pore structures on CO2 capture. Systematic quantitative analysis of structure–property relationships, combined with machine learning approaches, can effectively evaluate the contributions of structural ...
Zhifu Liu, Chuhan Fu, Tao Qi, Hui Zhou, Guangping Hao, Yalou Guo, Guoping Hu   +6 more
wiley   +1 more source

4,4′-(Anthracene-9,10-diylbis(ethyne-2,1-diyl))bis(1-benzyl-1-pyridinium) Bromide

Molbank
Viologens, i.e., quaternary 4,4′-bipyridinum salts, are a well-known class of functional organic compounds that have attracted in the past few decades a great deal of attention for their peculiar chemical and electrochemical properties and have therefore
Valentina Novelli, Andrea D’Annibale, Fabrizio Casano, Alessandro Latini, Lorenza Romagnoli   +4 more
doaj   +1 more source

New Coordinative Compounds with 4-(4’-pyridyl)pyridinium Disubstituted Monoylides

Croatica Chemica Acta, 2015
The complexes with manganese(II), iron(II), cobalt(II), nickel(II) and copper(II) of 2-(4, 4’-bipyridin-1-ium-1-yl)-1-(4-bromophenylamino)-3-(4-methoxyphenyl)-3-oxo-1-thioxopropan-2-ide (ylide, Y) were synthesized and characterized.
Rodica Postolachi, Ramona Danac, Aurel Pui   +2 more
doaj   +1 more source

FLP Mediated Conversion of Difluorobenzylalkynes to Fluoroallenyl Oniums via an SN1’ Pathway

Chemistry – A European Journal, EarlyView.
Frustrated Lewis pair (FLP) selective C‒F activation of difluorobenzylalkynes allows the formation of fluoroallenic oniums via an SN1’ substitution pathway. The fluoroallenic onium salts are synthetic precursors that allow subsequent functionalization at allenic and onium positions.
Max Coles, Tianhong Wang, Rubi McLennan, Long Kit Kwan, Bivas Mondal, Chakyu Richard Chan, Rowan D. Young   +6 more
wiley   +1 more source

π‐Extended Salphen Scaffolds Enable CO2 Electroreduction and Singlet Oxygen Generation

Chemistry – A European Journal, EarlyView.
New family of π‐extended salen ligands bearing phenylene bridge and tunable phenyl‐based substituents, and their corresponding boron difluoride complexes. Thanks to the extended π‐delocalization over the molecule, the ligands themselves show promising results in electrochemical CO2 reduction to CO, while the complexes act as efficient photosensitizers ...
Vincenzo Langellotti, André Korzun, Morgan J. McKee, Massimo Melchiorre, Taegeun Jo, J. Felipe Estrada‐Ruiz, Gregor Schnakenburg, Stefano Crespi, Francesco Ruffo, Nikolay Kornienko, Alessandro Bismuto   +10 more
wiley   +1 more source

Hybrid Macrocyclic Peptides — Synthetic Strategies to Diversify and Cyclize Peptide Libraries in Phage Display Selections

Chemistry – A European Journal, EarlyView.
Hybrid macrocyclic peptides unite genetically encoded peptide libraries with the structural complexity of synthetic small molecules. This Review critically analyzes phage‐compatible cyclization and diversification chemistries, highlights emerging opportunities beyond traditional cysteine‐based approaches, and outlines how future advances may enable the
Titia Rixt Oppewal, Clemens Mayer
wiley   +1 more source