A study of the phase transition in ammonium persulphate

Abdel‐Kader, M. M.; Mosaad, M. M.; El-Kabbany, F.

doi:10.1002/pssa.2211300211

Cited by 12 publications

(6 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…33−35 was selected for further research due to its relatively higher thermal stability and solubility (Table 1, entries 5 and 6). 36,37 Subsequently, different transition metals were employed to activate the persulfate salt. The significant improvements were observed using Fe, Cu, and Pd (Table 1, entries 8−10, entries 13 and 14) in comparison with the results without metal activation (entry 2).…”

mentioning

confidence: 99%

Oxidative Aromatization of 3,4-Dihydroquinolin-2(1H)-ones to Quinolin-2(1H)-ones Using Transition-Metal-Activated Persulfate Salts

et al. 2019

View full text Add to dashboard Cite

Inorganic persulfate salts were identified as efficient reagents for the oxidative aromatization of 3,4-dihydroquinolin-2(1H)-ones through the activation of readily available transition metals, such as iron and copper. The feasible protocol conforming to the requirement of green chemistry was utilized in the preparation of the key intermediate (7-(4-chlorobutoxy)quinolin-2(1H)-one 2) of brexpiprazole in 80% isolated yield on a 100 g scale, and different quinolin-2(1H)-one derivatives with various functional groups were demonstrated in 52–89% yields.

show abstract

mentioning

confidence: 99%

Oxidative Aromatization of 3,4-Dihydroquinolin-2(1H)-ones to Quinolin-2(1H)-ones Using Transition-Metal-Activated Persulfate Salts

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The latter will result in the formation of hydrogen bond of the type O-H... O. The change in hydrogen bonding scheme is the primary cause of the phase transition in some sulphate and/or persulphate compounds [18,13]. For the two compounds the common group is the SO4 group.…”

Section: Discussionmentioning

confidence: 99%

“…In the previous work we investigated the phase transition in ammonium persulphate, (NH4)2S2O8 [13]. The persulphate group, S2O8, consists of two sulphate ;groups (2SO4).…”

Section: Introductionmentioning

confidence: 99%

Electrical and Thermal Conductivities of Some Sulphate Compounds

et al. 1993

View full text Add to dashboard Cite

The electrical conductivity σ and the thermal conductivity λ were investigated at varying temperature (40 < T < 120°C) for two sulphate compounds, anhydrous mercury(II) sulphate HgSO4 and cerous(III) sulphate Ce2(SO4)3 • H2O. It seems likely that each of the two sulphate salts undergoes structural phase transition around 90°C. The differential thermal analysis thermogram was carried out as an aid for confirming of the observed phase transitions. The mechanism of the heat transfer is mainly due to phonons. Interpretation of the obtained data was given on the basis of the reorientational motion of the SO4--ions.

show abstract

“…In this paper we report on the electrical conductivity and dielectric constant (relative permittivity) ~ as function of temperature for the two oxalate compounds AOX and POX. Also our study was extended to the thermal properties, mainly the DTA, DSC and TGA thermograms from 300 K up to 520 K. The present study is part of our research programme into the phase transitions and/or the change in the conduction mechanism in some inorganic and/or organic compounds [14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Electrical and thermal properties of ammonium and potassium oxalates

Mosaad¹,

El-Shawarby

El-Tanahy

et al. 1995

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

conductivity (~) and the relative permittivity (~) were accurately measured as a function of temperature in the range 300 < T< 450 K for ammonium oxalate monohydrate (AOX), (NH4)2 C204H20 and potassium oxalate monohydrate (POX), K2C204H20. Differential thermal analysis (DTA), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) from 300 K up to 520 K were also performed for each compound. The data of the electrical parameters combined with the DTA and/or DSC thermograms suggest the existence ot; a possible change in the electrical conduction at 350 K for AOX and at 355 K for POX. Like most hydrogen-bonded molecules, the charge carriers may be protons and the electrical conduction is therefore protonic. At somewhat higher temperatures, dehydration and/or decomposition takes place in each compound and is reflected as a sudden loss in weight in the TGA plot.

show abstract

A study of the phase transition in ammonium persulphate

Cited by 12 publications

References 13 publications

Oxidative Aromatization of 3,4-Dihydroquinolin-2(1H)-ones to Quinolin-2(1H)-ones Using Transition-Metal-Activated Persulfate Salts

Oxidative Aromatization of 3,4-Dihydroquinolin-2(1H)-ones to Quinolin-2(1H)-ones Using Transition-Metal-Activated Persulfate Salts

Electrical and Thermal Conductivities of Some Sulphate Compounds

Electrical and thermal properties of ammonium and potassium oxalates

Contact Info

Product

Resources

About