Gao, "Preparation of water-soluble magnetite nanocrystals from hydrated ferric salts in
2-pyrrolidone: mechanism leading to [Fe.sub.3][O.sub.4] " Angewandte Chemie International Edition, vol.
Fourier transform infrared spectroscopy was used to investigate the interactions between [C.sub.60] and [C.sub.70] nanoparticles and 2-pyrrolidone (2-pyrrolidinone, [gamma]--lactam) in a toluene solvent environment.
Keywords: Infrared spectroscopy, nanoparticles, [C.sub.60] and [C.sub.70], fullerenes, fullerene/nanoparticle interactions, 2-pyrrolidone, 2-pyrrolidinone, [gamma]-lactam
This paper reports the results of an infrared spectroscopic study of the interactions between [C.sub.60] and [C.sub.70] nanoparticles and 2-pyrrolidone using toluene as a solvent environment (Aksenova et al.
The compound 2-pyrrolidone is a five-membered, cyclic amide sometimes referred to as gamma-lactam ([gamma]-lactam) or 2-pyrrolidinone.
Since the 2-pyrrolidone interaction with the nanoparticles is likely an equilibrium process involving both interacting and non-interacting 2-pyrrolidone, spectral collection was carried out over a broad concentration range (200 to 2 microliters ([micro]L) of 2-pyrrolidone per mL of toluene or toluene saturated with the nanoparticles) to determine the optimal concentrations to observe infrared spectral changes.
Betaine, Sodium Diodecyl Sulfate (SDS), Succinic Anhydride (SA), N-Methyl
2-Pyrrolidone (NMP), Boric acid, Sodium hydroxide (NaOH), Ethanol, Bovine Serum Albumin (BSA), Formamide and Salmon sperm DNA were purchased from Sigma.
Pyrrolidone is usually segregated into four types:
2-Pyrrolidone, N-Methylpyrrolidone, N-Vinylpyrrolidone, and N-Octylpyrrolidone.
1-Methyl
2-pyrrolidone (NMP) was purchased from POCh and used without further purification.
High purity methyl hydroquinone (MeHQ)(Aldrich); 4,4-difluoro benzophenone (DFBP)(Spectrochem, India); anhydrous potassium carbonate (BDH, India); N-methyl
2-pyrrolidone (NMP)(SRL, India), toluene (Qualigens, India) were used for the synthesis of PEEKMOH.
The conducting form of polyaniline (emeraldine salt) powder synthesized in aqueous HCI solution is insoluble in most common organic solvents including 1-methyl
2-pyrrolidone (NMP).