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Formation of nanographite using GaPO 4 ‐LTA as template
Author(s) -
Xi ChunYu,
Li GuoDong,
Zhao Xu,
Tian Ye,
Zhang Yu,
Chen JieSheng
Publication year - 2004
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20040221204
Subject(s) - chemistry , transmission electron microscopy , raman spectroscopy , electron paramagnetic resonance , zigzag , diamagnetism , crystallography , nanotechnology , magnetization , condensed matter physics , nuclear magnetic resonance , magnetic field , materials science , physics , geometry , mathematics , quantum mechanics , optics
An attempt was made to prepare nanographite with uniform size by pyrolysis of 4‐methyl pyridine (MPy), which is the structure‐directing agent for the formation of GaPO 4 ‐LTA single crystals, in the GaPO 4 ‐LTA framework at 760°C. The as‐prepared nanographite has been examined by Raman spectroscopy, transmission electron microscopy (TEM), electron spin resonance (ESR) and magnetization characterizations. The TEM image shows that the size of individual nanographite particles is about 7 nm, and it is proved that there are spins of sp 2 ‐type (π‐type) radical electrons localized on the zigzag edge sites of the nanographite. The magnetic susceptibility of the nanographite shows crossover from a high‐temperature diamagnetic to a low‐temperature paramagnetic behavior, in good agreement with the theoretical expectation.