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On the Formation of Palladium (II) Iodide Nanoparticles: An In Situ SAXS/XAS Study and Catalytic Evaluation on an Aryl Alkenylation Reaction in Water Medium
Author(s) -
Latocheski Eloah,
Marques Marcelo V.,
Albuquerque Brunno L.,
Schuh Thalia J.,
Signori Aline M.,
Oliveira Daniela C.,
Pal Taransankar,
Domingos Josiel B.
Publication year - 2019
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201801817
Subject(s) - palladium , catalysis , alkene , aryl , iodide , chemistry , xanes , small angle x ray scattering , extended x ray absorption fine structure , x ray absorption spectroscopy , nanoparticle , aqueous solution , photochemistry , inorganic chemistry , materials science , organic chemistry , absorption spectroscopy , nanotechnology , alkyl , physics , quantum mechanics , spectroscopy , scattering , optics
The synthesis of small spherical palladium(II) iodide nanoparticles is reported for the first time. The formation of the particles by ligand exchange, in the presence of poly(vinyl pyrrolidone) in aqueous medium at room temperature, was investigated by in situ time‐resolved synchrotron‐based SAXS and XANES/EXAFS analysis. These new nanomaterials exhibit a double catalytic role in an aryl alkenylation chemical reaction, working without a base or ligand, in aqueous milieu. There is strong experimental evidence to suggest that the mechanism follows a single‐electron transfer (SET) pathway with the participation of iodide as a radical promoter and the palladium atoms as activator of the alkene moiety. This new protocol could evolve into a broadly applicable radical reaction for the functionalization of alkenes.