Preparation of EuSe nanoparticles from Eu(III) complex containing selenides

Remarkable Magneto-Optical Properties of Europium Selenide Nanoparticles with Wide Energy Gaps

“…The · SeP(C 6 H 5 ) 2 moiety generates Se 2– and · SeP(C 6 H 5 ) 2 . The reaction mechanism is similar to that of EuS nanoparticles obtained from single source precursor; (PPh 4 ) [Eu(Et 2 dtc) 4 ]·2H 2 O . Thus, The Eu 1- x Se nanoparticles seems to be formed by the reaction of Eu(II) with Se 2– , followed by particle growth.…”

“…It is also proposed that the presence of tetraphenylphosinum cation (P(C 6 H 5 ) 4 + ) during the growth process has a pronounced effect on the shape and size of particles. P(C 6 H 5 ) 4 + cations easily stack on the anion species of the nanocrystals, that is, Se 2− anion sites . The presence of P(C 6 H 5 ) 4 + stacked on Eu 1- x Se nanoparticles 2 were confirmed by IR spectrum (Supporting Information Figure S8).…”

“…The preparation of Eu 1- x Se nanoparticles are carried out by the thermal reduction of Eu(III) complexes containing diphenyldiselenophosphinate ligands: (C 6 H 5 ) 2 PSe 2 , in 1-hexadecylamine (HDA) at 300 °C (Figure , Eu 1- x Se nanoparticles 1 ). In subsequent experiment, Eu 1- x Se nanoparticles containing tetraphenylphoshine cations (Figure , Eu 1- x Se nanoparticles 2 ) are also prepared and the influence of cationic species on the Eu 1- x Se surface is discussed . The Eu 1- x Se nanoparticles were characterized by XRD, TEM (high-resolution transmission electron microscopy), EDX (energy dispersive X-ray spectroscopy), SQUID (superconducting quantum interface device) and MIP-AES (microwave induced plasma atomic emission spectroscopy) measurements.…”

Divalent Europium Nanocrystals: Controllable Synthesis, Properties, and Applications

“…[50,51] Recently, several groups have reported alternative procedures utilizing single-source precursors for the preparation of EuS NCs. [52][53][54][55][56] For example, the Scholes group described a single-source precursor route to synthesize EuS NCs, the precursors being Eu(ddtc) 3 (bipy) and Eu(phen)(ddtc) 3 [ddtc = diethyldithiocarbamate, bipy = bipyridine, phen = 1,10phenanthroline]. [52] Similarly, Gao and co-workers reported a facile and direct synthesis of EuS nanoparticles in different size ranges by thermally decomposing the neutral molecular precursor Eu(phen)(ddtc) 3 .…”

“…[55] A similar single-source precursor route was employed by the Hasegawa group for the preparation of EuSe nanoparticles with a size of 19 nm, these nanoparticles being obtained by the thermal reduction of europium nitrate with a new organic selenium compound. [56] Compared with previous methods to obtain nanoscale Eu 2 + NCs, the approach of pyrolysis of single-source precursors was a mild reaction route and improved the qualities of the NCs. As seen, the single-source precursor approach had very demanding requirements for ligands; however, this kind of ligand for Eu 3 + ions was unique and rare.…”