The Formation of Dilanthanide Monooxide Tetrapropionate by Thermal Decomposition of Propionate Monohydrate of Rare Earth Elements(La,Ce,Pr,Nd).

Thermal decomposition of barium valerate in argon

“…Besides the formation of 5-nonanone the presence of CO2 in this first decomposition is also evidenced in Fig.10 (475°C). The formation of the symmetrical ketone 5-nonanone (C4H9COC4H9) as a byproduct of decomposition of a valerate salts is in line with previous observations of valerates [20,40], butyrates [39,43], propionates [38,[43][44][45][46][47] and many acetates including in particular Ba-acetate [48], where release of, respectively, 5-nonanone, 4-heptanone, 3-pentanone and acetone was reported. This feature can be explained on the basis of the free radical mechanism of Hites and Biemann [49], which in the case of Ba(C4H9CO2)2 can be summarized as:…”

Defect states and room temperature ferromagnetism in cerium oxide nanopowders prepared by decomposition of Ce-propionate

“…The dehydration process is accompanied by a step in mass loss of 1.4% registered at 97°C in TG and is consistent with the presence of an endothermic peak in DSC ( At the second stage the anhydrous Ce(C 2 H 5 COO) 3 is fused [36] in association with the endothermic peak observed in the DSC trace at around 233°C (Fig. 1).…”

“…2. The spectrum of the precursor powder P was identified as propionate Ce(C 2 H 5 COO) 3 [35,36]. Fig.…”

Studies on the thermal decomposition of lanthanum(III) valerate and lanthanum(III) caproate in argon

“…in lanthanum citrate [15,16], oxalate [18][19][20], tartrate [21,22], malonate [23], acetylacetonate [24], squarate [26], mandelate [27], sebacate [29], 2, 5-dihydroxybenzoate [30], 2,6-dihydroxybenzoate [31], 3,4-dihydroxybenzoate [32], 3,4,5-trihydroxybenzoate [33], 2-methoxybenzylidenepyruvate [34], 4-methylbenzylidenepyruvate [35] and 2-naphthoate [36]. Many among these studies have been performed in air, thus showing that La 2 O 2 CO 3 is stable against an oxidative atmosphere and may be difficult to avoid during synthesis processes using La-carboxylates as precursors.…”

“…The behavior of lanthanum alkanoates up to 200 C has been studied in details by Jongen et al [7] in relation to their potential use as liquid crystals. However, reports on the thermal decomposition of La-alkanoates at higher temperatures are limited to a few compounds, mostly with short length ligands including, lanthanum formate [8][9][10], acetate [11][12][13][14], propionate [15,16] butyrate [11,17,18] and enanthate [19]. Very limited information about the thermal decomposition of La-caproate may also be found in [11].…”