title: Absorption spectrophotometric study of supramolecular complexation of [60]- and [70]fullerenes with 24,26-dimethoxy-25,27-dihydroxy calix[4]arene.
abstract: Supramolecular interactions of 24,26-dimethoxy-25,27-dihydroxy calix[4]arene (1) with [60]- and [70]fullerenes have been studied in only chloroform and in a ternary solvent mixture comprising of chloroform, ethyl alcohol and toluene by UV-vis absorption spectrophotometric method. The experimental results are explained using the model that takes into account the interaction between electronic subsystems of 1 and fullerene. The most interesting feature is the preference of [60]fullerene over [70]fullerene for 1 in ternary solvent mixture as revealed by higher value of formation constant of [60]fullerene/1 complex. The selectivity towards [60]fullerene opens up the way toward self-assembling systems and new separation and purification methods for fullerenes.
authors.affiliation: Department of Chemistry, The University of Burdwan, Golapbag, Burdwan 713 104, India. sum_9974@rediffmail.com
authors.forename: Sumanta
authors.initials: S
authors.lastname: Bhattacharya
authors.forename: Sandip K
authors.initials: SK
authors.lastname: Nayak
authors.forename: Subrata
authors.initials: S
authors.lastname: Chattopadhyay
authors.forename: Manas
authors.initials: M
authors.lastname: Banerjee
mesh_terms: D047250:Calixarenes / Q000737:chemistry*; D002725:Chloroform / Q000737:chemistry; D004560:Electricity; D019277:Entropy; D000431:Ethanol / Q000737:chemistry; D037741:Fullerenes / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D013056:Spectrophotometry, Ultraviolet; D014050:Toluene / Q000737:chemistry
chemical_list: C508929:24,26-dimethoxy-25,27-dihydroxycalix(4)arene; D037741:Fullerenes; C069836:fullerene C70; D047250:Calixarenes; D014050:Toluene; D000431:Ethanol; D002725:Chloroform; C069837:fullerene C60