Coumarin-Conjugated Multiwalled Carbon Nanotubes for Potential Biological Applications: Development and Characterization
作者:D. Iannazzo、A. Piperno、G. Romeo、R. Romeo、A. Ferlazzo、A. Pistone、M. Lanza、C. Milone
DOI:10.1166/jnn.2012.4929
日期:2012.6.1
This work presents a novel cascade of chemical functionalization of multiwalled carbon nanotubes which allows the conjugation with differently substituted coumarins. Aim of the present work is to synthesize new materials able to rescue cells from the adverse effect of CNT particles since pristine CNTs are practically insoluble and tend to accumulate inside cells, organs and tissues. Moreover, it was reported that single walled CNTs particles show an adverse effect on keratinocytes through an oxidative mechanism, leading to NF-kB activation. The conjugation with coumarins, known superoxide anion scavengers, could switch the cytotoxicity of the new materials. The cascade functionalization of MWCNTs by sequential steps of carboxylation, acylation, amine modification and finally, coumarin conjugation have been performed and the synthesis and the chemical properties of several f-MWCNTs-coumarins have been exploited.
这项工作提出了多壁碳纳米管化学功能化的新型级联,其允许与不同取代的香豆素缀合。目前工作的目的是合成能够拯救细胞免受碳纳米管颗粒不利影响的新材料,因为原始碳纳米管实际上是不溶的,并且往往会在细胞、器官和组织内积聚。此外,据报道,单壁碳纳米管颗粒通过氧化机制对角质形成细胞产生不利影响,导致 NF-kB 激活。与香豆素(已知的超氧阴离子清除剂)结合可以改变新材料的细胞毒性。通过羧化、酰化、胺修饰和最后香豆素缀合的连续步骤对多壁碳纳米管进行级联功能化,并开发了几种 f-多壁碳纳米管-香豆素的合成和化学性质。