Thermal decomposition study of the coordination compound [Fe(urea)6](NO3)3

Carp, Oana; Patron, Luminiţa; Diamandescu, L.; Reller, Armin

doi:10.1016/s0040-6031(02)00085-0

Cited by 47 publications

(62 citation statements)

References 19 publications

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“…1, and the main bands in the infrared spectra are summarized in Table II. Through this assignment, particularly by the absence of a carbonyl band at 1684 cm -1 , 15 and by the decrease in the wavenumber of the (CO) ϩ ␦(NH 2 ) vibration, 16 the formation of oxygen-to-metal coordinate bonds (CϭO 3 M) in AUC, CUN, and FUN are determined.…”

Section: (1) Characteristics Of the Metal-urea Complexesmentioning

confidence: 99%

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Metal‐Urea Complex—A Precursor to Metal Nitrides

Qiu

Gao

2004

Journal of the American Ceramic Society

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A novel and general route to synthesize various metal nitrides (AlN, CrN, and ζ‐Fe2N) from metal–urea complexes is presented. These complexes, especially metal–urea chloride, have proved to be useful precursors to metal nitrides, because urea molecules construct a coordination sphere around the metal atom and form a stable structure, compared with the air‐sensitive halide. Different anions in the second coordination sphere determine the reaction mechanism. The transformation from metal–urea chloride to nitride is thought to follow a nucleation–growth mechanism, while that from metal–urea nitrate is thought to follow a nitridation mechanism. We anticipate that this metal–urea complex will find applications in the fabrication of other, more complex, nitrides.

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Section: (1) Characteristics Of the Metal-urea Complexesmentioning

confidence: 99%

“…(2) and (3)). 16 Subsequently, AlCl 3 is converted to the AlCl 3 ⅐xNH 3 adduct according to Eq. (4), 19 where x is determined as 3 using TG analysis.…”

Section: (1) Characteristics Of the Metal-urea Complexesmentioning

confidence: 99%

Metal‐Urea Complex—A Precursor to Metal Nitrides

Qiu

Gao

2004

Journal of the American Ceramic Society

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“…There are several reports of the synthesis, characterization, and thermal behaviour of the Fe-Urea complex, [37][38][39][40] but unfortunately, they are difficult to reproduce and in some cases, lead to an orange powder. For this reason, the development of an easy method to obtain a highly pure light-green powder consisting of a Fe-Urea complex was optimized.…”

Section: Resultsmentioning

confidence: 99%

“…It is important to note that the thermal decomposition of the Fe-Urea complex can lead to the formation of toxic compounds, e.g. HCNO, as determined by Carp et al [40] For this reason, the reaction was carried out first at 1558C for 1 h, and then at 3008C for 1 h to diminish the formation of these toxic compounds. Finally, in order to diminish the crystal growth of the Fe 3 O 4 -OA seeds and considering that the flash point of Pd(Acac) 2 is near to 2058C, the palladium shell was achieved by the decomposition of Pd(Acac) 2 at 2008C.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Characterization, and Nanocatalysis Application of Core–Shell Superparamagnetic Nanoparticles of Fe3O4@Pd

et al. 2015

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There is a wide number of different synthetic methods to obtain magnetite (Fe 3 O 4 ) superparamagnetic nanoparticles (SPNPs). However, only a few are able to produce very small and well defined SPNPs with narrow size distribution. We report a modification of the metal-complex decomposition in organic media method in which we replace iron(III) acetylacetonate (Fe(Acac) 3 ) with an iron-urea complex (Fe-Urea) as metal source for the synthesis. With this modification we were able to obtain small particle sizes with a good control in size distribution. The Fe-Urea complex is easy to prepare with excellent yields. Core-shell nanoparticles are then prepared using palladium(II) acetylacetonate as a Pd source, to obtain a Pd 0 shell stabilised by oleylamine. The core-shell superparamagnetic nanoparticles of Fe 3 O 4 @Pd-OA are extensively characterized by FT-IR, powder X-ray diffraction, transmission electron microscopy, UV-vis, thermogravimetric analysis/differential scanning calorimetry, and magnetic susceptibility measurements, and tested in a palladiumcatalyzed cross-coupling Suzuki-Miyaura reaction with promising results.

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“…One pot solvothermal reaction of Feeurea complex in ethanol was carried out to prepare Fe 3 O 4 (magnetite) with superparamagnetic property [12]. Carp et al [13] based on thermal analysis had earlier proposed mechanism for decomposition of the Feeurea complex which could either involve oxidation of intermediate hydroxide or oxyhydroxide species to form Fe(III)oxides. Thermal decomposition of the complex in presence of excess urea is reported to form g-phase [14].…”

Section: Introductionmentioning

confidence: 99%