title: NMR spectrometric study of molecular complex formation of [60]- and [70]fullerenes with a number of phosphine oxides.
abstract: Molecular complex formation between [60]- and [70]fullerenes with a series of phosphine oxides, namely, tri-n-octyl phosphine oxide, triphenyl phosphine oxide and tri-n-butyl phosphine oxide has been studied in CCl4 medium by NMR spectrometric method. Both [60]- and [70]fullerenes have been shown to form 1:1 adducts with the above series of phosphine oxides. Formation constants (K) for all the complexes have been determined from the systematic variation of NMR chemical shifts of specific protons of the donors in presence of [60]- and [70]fullerenes. Trends in the values of K suggest that [70]fullerene binds stronger with the phosphine oxides relative to [60]fullerene.
authors.affiliation: Department of Chemistry, University of Burdwan, Golapbag, Burdwan 713104, India.
authors.forename: Sumanta
authors.initials: S
authors.lastname: Bhattacharya
authors.forename: Shrabanti
authors.initials: S
authors.lastname: Banerjee
authors.forename: Sandip K
authors.initials: SK
authors.lastname: Nayak
authors.forename: Subrata
authors.initials: S
authors.lastname: Chattopadhyay
authors.forename: Asok K
authors.initials: AK
authors.lastname: Mukherjee
mesh_terms: D002251:Carbon Tetrachloride / Q000737:chemistry; D037741:Fullerenes / Q000737:chemistry*; D007700:Kinetics; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008956:Models, Chemical; D008968:Molecular Conformation; D009943:Organophosphorus Compounds / Q000737:chemistry; D010720:Phosphines / Q000737:chemistry*; D011485:Protein Binding; D011522:Protons; D011725:Pyridines / Q000737:chemistry; D013053:Spectrophotometry / Q000379:methods*
chemical_list: D037741:Fullerenes; D009943:Organophosphorus Compounds; D010720:Phosphines; D011522:Protons; D011725:Pyridines; C069836:fullerene C70; D002251:Carbon Tetrachloride; C069837:fullerene C60