NDLI: Lanthanum Nitride Endohedral Fullerenes $La_{3}N@C_{2n}$ (43≤n≤55): Preferential Formation of $La_{3}N@C_{96}$

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Lanthanum Nitride Endohedral Fullerenes $La_{3}N@C_{2n}$ (43≤n≤55): Preferential Formation of $La_{3}N@C_{96}$

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Lanthanum Nitride Endohedral Fullerenes $La_{3}N@C_{2n}$ (43≤n≤55): Preferential Formation of $La_{3}N@C_{96}$

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Chaur, Manuel N. Kumbhar, Amar Melin, Frederic Echegoyen, Luis Ashby, Jarryd Rao, Apparao M. Elliott, Bevan
Description	Author Affiliation: Chaur MN ( Chemistry Department, Clemson University, 219 Hunter Laboratories, Clemson, SC 29630-0973, USA.)
Abstract	While the trimetallic nitrides of Sc, Y and the lanthanides between Gd and Lu preferentially template $C_{80}$ cages, $M_{3}N@C_{80},$ and while those of Ce, Pr and Nd preferentially template the $C_{88}$ cage, $M_{3}N@C_{88},$ we show herein that the largest metallic nitride cluster, $La_{3}N,$ preferentially leads to the formation of $La_{3}N@C_{96}$ and to a lesser extent the $La_{3}N@C_{88}.$ This is the first time that $La_{3}N$ is successfully encapsulated inside fullerene cages. $La_{3}N@C_{2n}$ metallofullerenes were synthesized by arcing packed graphite rods in a modified Krätschmer–Huffman arc reactor, extracted from the collected soot and identified by mass spectroscopy. They were isolated and purified by high performance liquid chromatography (HPLC). Different arcing conditions were studied to maximize fullerene production, and results showed that yields have a high $La_{2}O_{3}/C$ dependence. Relatively high yields were obtained when a 1:5 ratio was used. Three main fractions, $La_{3}N@C_{88},$ $La_{3}N@C_{92},$ and $La_{3}N@C_{96},$ were characterized by UV/Vis-NIR and cyclic voltammetry. Unlike other trimetallic nitride metallofullerenes of the same carbon cage size, $La_{3}N@C_{88}$ exhibits a higher HOMO–LUMO gap and irreversible reduction and oxidation steps.
ISSN	09476539
e-ISSN	15213765
Journal	Chemistry - A European Journal
Issue Number	27
Volume Number	14
Language	English
Publisher	Wiley-VCH;ChemPubSoc Europe
Publisher Date	2008-01-01
Publisher Place	Germany
Access Restriction	Open
Subject Keyword	Chemistry
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Catalysis

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