The influence of the R group in the thermal stability of Sn4R4O6 (R=methyl, n-butyl or phenyl)

Pereira, Alline Gomes; Batalha, L. A. R.; Porto, A.O.; Lima, Geraldo Μ. de; Silva, Glaura G.; Ardisson, José D.; Siebald, Helmuth G.L.

doi:10.1016/j.materresbull.2003.09.002

Cited by 15 publications

(3 citation statements)

References 21 publications

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“…[21] The thermal decomposition of diphenyl and triphenyltin pyrrolidinedithiocarbamate complexes [22] or of the asymmetric dithiocarbamate organotin complexes [SnMe 3 {S 2 CN(Bu)(Me)}] and [SnPh{S 2 CN(Bu)(Me)} 3 ] [23] yielded mixtures of SnS and Sn 2 S 3 . In contrast to Sn-based oxide materials [24,25] widely prepared by pyrolysis technique, this methodology has been less used for tin-sulfide-containing materials [26,27] Other works have investigated the thermal decomposition of a number of organotin(IV) thiozolate-based derivatives. [28,29] Recently an interesting approach has been described in the literature, involving solvothermal decomposition of dithiocarbamate tin(II) precursor.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of phase‐pure SnS particles employing dithiocarbamate organotin(IV) complexes as single source precursors in thermal decomposition experiments

Menezes

Lima

Carvalho

et al. 2010

Applied Organom Chemis

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Preparation of tin(II ] (4). Phase-pure tin(II) sulfide has been obtained by pyrolysis of these precursors at 350• C in N 2 . Thermogravimetric analysis, X-ray powder diffraction, scanning electron microscopy, X-ray electron probe microanalysis and 119 Sn Mössbauer spectroscopy revealed that the complexes decompose in a single and sharp step (1 and 2), or in pseudo-single stage (3 and 4), to produce SnS. We have also measured the bandgap energies of the residues using electronic spectroscopy in the solid state and the result relates well to that in the literature for SnS, 1.3 eV. A decomposition mechanism was also proposed for each complex based on electrospray ionization tandem mass spectrometric results. The synthetic method used in this work might be useful for the preparation of pure SnS on a large scale.

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Section: Introductionmentioning

confidence: 99%

Synthesis of phase‐pure SnS particles employing dithiocarbamate organotin(IV) complexes as single source precursors in thermal decomposition experiments

Menezes

Lima

Carvalho

et al. 2010

Applied Organom Chemis

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“…The crystallite average size calculated by Scherrer equation [19,23] (1) is in the range of 36−57 nm (Table 1).…”

Section: Resultsmentioning

confidence: 99%

“…However, a considerable attention has been given to the thermal decomposition of organometallic compounds in the last few years because they decompose at low temperature producing metallic oxides/sulfides and metallic particles. A thorough survey of literature reveals that limited studies have been carried out to prepare nanometric SnO 2 by the pyrolysis of single source organotin precursors [18][19][20]. Further, it is important to mention that there is only a single reference recently reported by us in which some organotin-macrocyclic complexes are used as single source precursors for preparation of nanometric SnO 2 through their pyrolysis route [21].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Nanometric Pure Phase SnO₂ Obtained from Pyrolysis of Diorganotin(IV) Derivatives of Macrocycles

Nath

Saini

2012

ISRN Nanomaterials

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Thermal decomposition of diorganotin(IV) derivatives of macrocycles of general formula, R 2 Sn(L1) and R 2 Sn(L2) (where R = n-butyl (1/4), methyl (2/5), and phenyl (3/6); H 2 L1 = 5,12-dioxa-7,14-dimethyl-1,4,8,11-tetraazacyclotetradeca-1,8-diene and H 2 L2 = 6,14-dioxa-8, 16-dimethyl-1,5,9,13-tetraazacyclotetradeca-1,9-diene), provides a simple route to prepare nanometric SnO 2 particles. X-ray line broadening shows that the particle size varies in the range of 36-57 nm. The particle size of SnO 2 obtained by pyrolysis of 3 and 5 is in the range of ∼5-20 nm as determined by transmission electron microscope (TEM). The surface morphology of SnO 2 particles was determined by scanning electron microscopy (SEM). Mathematical analysis of thermogravimetric analysis (TGA) data shows that the first step of decomposition of compound 4 follows first-order kinetics. The energy of activation (E * ), preexponential factor (A), entropy of activation (S * ), free energy of activation (G * ), and enthalpy of activation (H * ) of the first step of decomposition have also been calculated. Me 2 Sn(L2) and Ph 2 Sn(L1) are the best precursors among the studied diorganotin(IV) derivatives of macrocycles for the production of nanometric SnO 2 .

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Preparation of a new composite by reaction of SnBu₃Cl with TiCl₄ in the presence of NH₄OHphotocatalytic degradation of indigo carmine

Coelho

Andrade

Lima

et al. 2010

Applied Organom Chemis

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Reactions of SnBu 3 Cl, TiCl 4 and NH 4 OH in ethanol followed by pyrolysis of the resultant product at 550• C, either in an atmosphere of oxygen or hydrogen, yielding new SnO 2 -TiO 2 based composites. In all, eight products were prepared with weight ratios of Sn-TiO 2 of 0% (1), 5% (2), 15% (3) and 30% (4) in O 2 and 0% (5), 5% (6), 15% (7) and 30% (8) in H 2 . XRD revealed diffraction patterns of TiO 2 (anatase) in the composites, but not those of SnO 2 due to its insufficient crystallinity. Scanning electron microscopy indicated the presence of Sn metal on the surface of composites 6-8. 119 Sn Mössbauer experiments revealed SnO 2 in all samples, and increasing amounts of tin in samples 7 and 8, respectively. The composites were used in experiments of photocatalytic degradation of indigo carmine dye. The catalytic experiments monitored by mass spectrometry and electronic spectroscopy revealed that, in the conditions of the experiments, composite 8 displays the highest activity. In addition, degradation products were characterised using electrospray ionization mass spectrometry (ESI-MS and ESI-MS/MS) data.

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The influence of the R group in the thermal stability of Sn4R4O6 (R=methyl, n-butyl or phenyl)

Cited by 15 publications

References 21 publications

Synthesis of phase‐pure SnS particles employing dithiocarbamate organotin(IV) complexes as single source precursors in thermal decomposition experiments

Synthesis of phase‐pure SnS particles employing dithiocarbamate organotin(IV) complexes as single source precursors in thermal decomposition experiments

Synthesis and Characterization of Nanometric Pure Phase SnO₂ Obtained from Pyrolysis of Diorganotin(IV) Derivatives of Macrocycles

Preparation of a new composite by reaction of SnBu₃Cl with TiCl₄ in the presence of NH₄OHphotocatalytic degradation of indigo carmine

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The influence of the R group in the thermal stability of Sn4R4O6 (R=methyl, n-butyl or phenyl)

Cited by 15 publications

References 21 publications

Synthesis of phase‐pure SnS particles employing dithiocarbamate organotin(IV) complexes as single source precursors in thermal decomposition experiments

Synthesis of phase‐pure SnS particles employing dithiocarbamate organotin(IV) complexes as single source precursors in thermal decomposition experiments

Synthesis and Characterization of Nanometric Pure Phase SnO2 Obtained from Pyrolysis of Diorganotin(IV) Derivatives of Macrocycles

Preparation of a new composite by reaction of SnBu3Cl with TiCl4 in the presence of NH4OHphotocatalytic degradation of indigo carmine

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Synthesis and Characterization of Nanometric Pure Phase SnO₂ Obtained from Pyrolysis of Diorganotin(IV) Derivatives of Macrocycles

Preparation of a new composite by reaction of SnBu₃Cl with TiCl₄ in the presence of NH₄OHphotocatalytic degradation of indigo carmine