Lanthanum endohedral metallofulleropyrrolidines: synthesis, isolation, and EPR characterization.
Lanthanum endohedral metallofulleropyrrolidines have been synthesized for the first time through addition of an azomethine ylide to La@C(82)-A in toluene. It was found that the addition reaction is very efficient and, to some extent, regioselective. Two major endohedral metallofulleropyrrolidines, a monoadduct and a bisadduct of La@C(82)-A with abundance ratio of approximately 1:0.4, have been isolated by HPLC chromatography and characterized by mass spectrometry, UV/Vis-NIR absorption, and EPR spectroscopy. The electronic structure of La@C(82)-A has been modified slightly upon monoaddition and significantly upon bisaddition of the pyrrolidines.
Cao
Baopeng
B
Center for Tsukuba Advanced Research Alliance, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan.
Wakahara
Takatsugu
T
Maeda
Yutaka
Y
Han
Aihong
A
Akasaka
Takeshi
T
Kato
Tatsuhisa
T
Kobayashi
Kaoru
K
Nagase
Shigeru
S