Surface modification induced shielding effects on electron orbital coupling in metallofullerene.
The electronic properties of four metallofullerenol samples (La@C82(OH)32, La@C82(OH)24, La@C82(OH)18, La@C82(OH)12) and La@C82 were investigated by synchrotron radiation photoelectron emission spectra (PES). A new emission peak with binding energy of 13.9 eV, which is attributed to La 5d orbitals coupling with nanocage orbitals, is observed in PES of La@C82 for the first time. This suggestion is also supported by previous DFT calculations. Furthermore, the new emission peak disappears when the surface of La@C82 is modified with specific numbers of OH groups, which means the electron orbital coupling between inner metallic atoms and outer nanocage in metallofullerene could be shielded by surface modifications on the outer nanocage.
CAS Key Lab for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, and National Center for Nanoscience and Technology of China, Beijing 100049, China.
Shukuan
S
Wang
Baoyun
B
Sun
Dongmei
D
Yue
Long
L
Jing
Rui
R
He
Tongxiang
T
Ren
Jinquan
J
Dong
Hui
H
Yuan
Gengmei
G
Xing
Jiaou
J
Wang
Yuliang
Y
Zhao
Kurash
K
Ibrahim
D002851:Chromatography, High Pressure Liquid; D004583:Electrons; D037741:Fullerenes / Q000737:chemistry*; D007811:Lanthanum / Q000737:chemistry*; D056951:Photoelectron Spectroscopy; D013499:Surface Properties
D037741:Fullerenes; D007811:Lanthanum