title: Selective complexation and reactivity of metallic nitride and oxometallic fullerenes with Lewis acids and use as an effective purification method.
abstract: Metallic nitride fullerenes (MNFs) and oxometallic fullerenes (OMFs) react quickly with an array of Lewis acids. Empty-cage fullerenes are largely unreactive under conditions used in this study. The reactivity order is Sc(4)O(2)@I(h)-C(80) > Sc(3)N@C(78) > Sc(3)N@C(68) > Sc(3)N@D(5h)-C(80) > Sc(3)N@I(h)-C(80). Manipulations of Lewis acids, molar ratios, and kinetic differences within the family of OMF and MNF metallofullerenes are demonstrated in a selective precipitation scheme, which can be used either alone for purifying Sc(3)N@I(h)-C(80) or combined with a final high-performance liquid chromatography pass for Sc(4)O(2)@I(h)-C(80), Sc(3)N@D(5h)-C(80), Sc(3)N@C(68), or Sc(3)N@C(78). The purification process is scalable. Analysis of the experimental rate constants versus electrochemical band gap explains the order of reactivity among the OMFs and MNFs.
authors.affiliation: Department of Chemistry and Biochemistry, University of Southern Mississippi, Hattiesburg, Mississippi 39406, USA. Steven.Stevenson@usm.edu
authors.forename: Steven
authors.initials: S
authors.lastname: Stevenson
authors.forename: Mary A
authors.initials: MA
authors.lastname: Mackey
authors.forename: Jane E
authors.initials: JE
authors.lastname: Pickens
authors.forename: Melissa A
authors.initials: MA
authors.lastname: Stuart
authors.forename: Bridget S
authors.initials: BS
authors.lastname: Confait
authors.forename: J Paige
authors.initials: JP
authors.lastname: Phillips
mesh_terms: D000077410:Aluminum Chloride; D017607:Aluminum Compounds / Q000737:chemistry*; D002712:Chlorides / Q000737:chemistry*; D037741:Fullerenes / Q000737:chemistry*; D007700:Kinetics; D009584:Nitrogen / Q000737:chemistry*; D012538:Scandium / Q000737:chemistry*; D013997:Time Factors
chemical_list: D017607:Aluminum Compounds; D002712:Chlorides; D037741:Fullerenes; D000077410:Aluminum Chloride; D009584:Nitrogen; D012538:Scandium