Superparamagnetic energetic nanoparticles: a surface self-propagation pathway for the thermal decomposition of ammonium perchlorate

Evaluation of Mono and Bimetallic Ferrocene-Based 1,2,3-Triazolyl Compounds as Burning Rate Catalysts for Solid Rocket Motor

“…Compound 2 can be observed in the 1 H NMR spectrum (Figure 4), which shows signals at δ 12 ppm correspond to protons of the ferrocene moiety. Unfortunately, 13 C NMR spectrum is not given due to the low solubility of compound 2 in deuterated DMSO solvent (Figure S1). The 1 H NMR spectrum (Figure 5) of the compound 1-IL, the same way as compound 1 previously informed, 46 shows signals at δ 8.77 and 7.67−7.56 ppm, which can be attributed to the protons of the triazolyl and the phenyl ring, respectively.…”

“…According to the 1 H NMR (Figure S3) data given for compound 2-IL, like its mononuclear counterpart, the outstanding signals are at δ 4.72, 2.11, 1.99, and 1.31 ppm corresponding to the protons in the butane chain. In the case of the 13 C NMR spectrum (Figure S4), the signals standout at 31.63, 23.45, 20.02, and 13.76 ppm, corresponding to the carbons belonging to the butyl groups.…”

“…The signal at δ 3.16 ppm corresponds to the protons on the Cp ring of the ferrocene moiety. The most notable signals in the 13 C NMR spectrum at δ 31.11, 20.08, and 13.64 ppm correspond to the carbons of the butyl group (Figure S2). According to the 1 H NMR (Figure S3) data given for compound 2-IL, like its mononuclear counterpart, the outstanding signals are at δ 4.72, 2.11, 1.99, and 1.31 ppm corresponding to the protons in the butane chain.…”

“…Elemental analyses (C and H) were made with a Fissions EA 1108 microanalyzer. 1 H and 13 C NMR spectra were recorded on Bruker AC-400 and Bruker AC-200P spectrometers. Chemical shifts were reported in ppm relative to residual solvents and were assigned using 2D NMR tools.…”

“…These catalysts can be classified into four categories: transition metal oxides, , nanoparticles, − transition metal complexes, − and ferrocene (Fc)-based compounds. ,,− Transition metal oxides are inexpensive and simple to produce but have less worth in combustion. Nanoparticles have the advantage of being easier to transfer electrons and significantly reducing the decomposition temperature and activation energy for AP. , However, they are prone to aggregate and preferentially adsorbed on components during mixing, resulting in less dispersion of nano-Fe 2 O 3 particles and heat release of AP . Fc-based compounds, with their excellent redox and electrocatalytic properties, have attracted much attention for their potential in the research of CSPs .…”