Design, characterization and catalytic evaluation of halometallic ionic liquid incorporated Nd₂O₃nanoparticles ([smim][FeCl₄]⁻@Nd₂O₃) for the synthesis ofN-aryl indeno pyrrole derivatives

Abstract

Silica modified imidazolium based halometallic ionic liquids, [smim][MCl4] and [smim][FeCl4]−@Nd2O3 were synthesized for the evaluation of acidic and catalytic properties.

A Nonaqueous Eutectic Electrolyte for Rechargeable Iron Batteries

“…As evidenced from the FTIR spectra, FeCl 3 presence induces a strong physical bond formed between N–H, and leads to the formation of quaternary ammonium ion, i.e ., ((C 2 H 5 ) 3 N–H) + , which is indexed in the range 2850–3000 cm –1 from the Raman spectra (shown in Figure SI4). It is likely that the counterion in the eutectics is tetrachloroferrate, which is a weak hydrogen bond acceptor . Another peak in the lower frequency region at 420–360 cm –1 is likely to correspond to the poly nuclear complex Fe 2 Cl 7 – , formed by chloride bridging of two FeCl 3 units. , The eutectics with 1.7:1 (Et 3 NH)­Cl:FeCl 3 composition shows the prominent shift of peaks toward higher frequency, which represents the acidity of the ionic complexes formed.…”

“…29 Another peak in the lower frequency region at 420−360 cm −1 is likely to correspond to the poly nuclear complex Fe 2 Cl 7 − , formed by chloride bridging of two FeCl 3 units. 29,30 The eutectics with 1.7:1 (Et 3 NH)Cl:FeCl 3 composition shows the prominent shift of peaks toward higher frequency, which represents the acidity of the ionic complexes formed. The presented FTIR and Raman data are consistent with the presence in the electrolyte of mono-and binuclear iron chloride complexes together with triethylammonium cation.…”

“…Peaks at 712.4 and 725.2 eV correspond to the Fe 3+ 2p 3/2 and Fe 3+ 2p 1/2 states, respectively, while the presence of Cl 2p in the cycled electrode, as shown in Figure 6(h), confirms the Fe 3+ state from chloroferrate-ions. 29,58 A broad satellite peak at ∼717.1 eV is also attributed to the Fe 3+ state. 57,59 Additional peaks corresponding to Fe 2+ 2p 3/2 at 707.7 eV and Fe 2+ 2p 1/2 at ∼720.8 eV indicate the presence of Fe 2+ , suggesting the formation of Fe x -O upon cycling.…”

Ionic Liquid Functionalized Metal–Organic Framework ([DEIm][PF6]@MOF-5): Synthesis, Characterization, and Catalytic Application in the Reduction of 4-Nitrophenol

“… 71 The peak at 546 cm –1 was ascribed to Zn–O stretching. In the FTIR spectrum of [DEIm][Br] ( Figure 1 b), the peak at 3140 cm –1 was due to the C–H bond of imidazole ring, 63 whereas the peaks at 2974 and 2852 cm –1 were attributed to the −C–H stretching vibrations of −CH 2 and −CH 3 groups positioned at the nitrogen atoms of the imidazolium ring. 72 The peaks at 1631 and 1450 cm –1 were attributed to C=N and C–N stretching vibrations of the imidazole ring.…”

“…Continuing our recent publications on the synthesis and applications of IL-based catalysts, − we present here the synthesis of [DEIm]­[PF 6 ]@MOF-5 as an effective and reusable catalyst for the reduction of 4-NP to 4-AP.…”