Roubeau Olivier, Lucas Antoine, Pénicaud Alain, Derré Alain
Université Bordeaux 1, CNRS, Centre de Recherche Paul Pascal, 115 avenue du Dr. Albert Schweitzer, F-33600 Pessac, France.
J Nanosci Nanotechnol. 2007 Oct;7(10):3509-13. doi: 10.1166/jnn.2007.823.
Organometallic reagents such as butyllithium are known to covalently functionalize the sidewalls of carbon nanotubes. The function grafted corresponds to the organic part of the alkali compound, while one negative charge is transferred to the nanotube for each function. Carbon nanotubes reduced by organolithium compounds were used here as nucleophilic reactive species through these transferred and delocalized charges. Various halogenated electrophiles in excess were reacted with them in anhydrous conditions. The grafting of the corresponding chemical function onto the carbon nanotubes through a Lewis metathetic exchange reaction was demonstrated by chemical, thermal, and spectroscopic analyses. This synthetic route applied successfully to both single-walled and multi-walled nanotubes and to a series of electrophiles. The extent of functionalization was found to depend on stoechiometries used, although a direct correlation could not be obtained.
诸如丁基锂之类的有机金属试剂已知可使碳纳米管的侧壁发生共价官能化。接枝的官能团对应于碱化合物的有机部分，而每引入一个官能团，就有一个负电荷转移到纳米管上。通过这些转移和离域的电荷，此处使用经有机锂化合物还原的碳纳米管作为亲核反应物种。在无水条件下，让各种过量的卤代亲电试剂与它们发生反应。通过化学、热学和光谱分析证明了通过路易斯复分解交换反应将相应的化学官能团接枝到碳纳米管上。这条合成路线成功应用于单壁和多壁纳米管以及一系列亲电试剂。尽管未能得到直接的相关性，但发现官能化程度取决于所使用的化学计量比。
