Isolation of CeLu2N@Ih‐C80 through a Non‐Chromatographic, Two‐Step Chemical Process and Crystallographic Characterization of the Pyramidalized CeLu2N within the Icosahedral Cage. Issue 29 (8th June 2015)

• Record Type: Journal Article
• Authors: Stevenson, Steven; Thompson, Hannah R.; Arvola, Kristine D.; Ghiassi, Kamran B.; Olmstead, Marilyn M.; Balch, Alan L.
• Is Part Of: Chemistry. Volume 21:Issue 29(2015)
• Page Start: 10362
• Page End: 10368
• Publication Date: 2015-06-08
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201500915
• Languages: English
• ISSNs: 0947-6539

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>By combining two chemical methods of purification, 4 mg of purified CeLu₂N@C₈₀ was readily isolated from 500 mg of carbon soot extract without the use of recycling HPLC, a method which has previously been necessary to obtain pure samples of endohedral fullerenes. In stage 1, CeLu₂N@C₈₀ was selectively precipitated by virtue of its low first oxidation potential (+0.01 V) and the judicious choice of MgCl₂ as the Lewis acid precipitant. For stage 2, we used a stir and filter approach (SAFA), which employed the electron‐rich NH₂ groups immobilized on silica gel to selectively bind residual endohedrals and higher cage fullerenes that were contaminants from stage 1. Crystallographic analysis of CeLu₂N@C₈₀ in the co‐crystal CeLu₂N@<italic>I_h</italic>‐C₈₀<bold>⋅</bold>Ni(octaethylporphyrin)<bold>⋅</bold>2(toluene) reveals that the <italic>I</italic>_h‐C₈₀ cage is present with a pyramidalized CeLu₂N unit inside.</p> </abstract>