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Mechanistic Investigations of the Synthesis of Size‐Tunable Ni Nanoparticles by Reduction of Simple Ni II Diamide Precursors
Author(s) -
Bhattacharyya Koyel X.,
Pradel Christian,
Lecante Pierre,
Mézailles Nicolas
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201701258
Subject(s) - nickel , nanoparticle , dispersity , thermal decomposition , imine , decomposition , particle size , materials science , thermal stability , chemical engineering , chemistry , inorganic chemistry , nanotechnology , catalysis , polymer chemistry , organic chemistry , metallurgy , engineering
Herein, we present a detailed study of the conversion of a nickel(II) diamide precursor to size‐tunable, monodisperse nickel nanoparticles (NPs). The thermal decomposition of nickel(II) dioleylamide, synthesized either independently or in situ, resulted in the formation of Ni NPs without the coproduction of water. Mechanistic studies were conducted on the stability and reduction pathway of the Ni II precursor, and on the consequent particle formation. Variations in the ratio of trioctylphosine (TOP) to nickel allowed size tunability, which resulted in nanoparticles that ranged in size from 4 to 11 nm in diameter. The DFT calculations support a mechanistic pathway that involves nickel reduction by imine formation. This water‐free method was extended to the synthesis of water‐sensitive M 0 NPs (M=Fe, Co).