Carbohydrate- and Chain Length-Controlled Complexation of Carbon Nanotubes by Glycopolymers
Carbohydrate- and Chain Length-Controlled Complexation of Carbon Nanotubes by Glycopolymers
复制标题
DOI：
10.1021/acs.langmuir.0c01498
复制
发表时间：
2020-08-25
期刊：
影响因子：
3.9
通讯作者：
Ao, Geyou
中科院分区：
文献类型：
--
作者：
Cantwell, Michael A.;Chan, Ka Keung;Ao, Geyou
单壁碳纳米管（SWCNTs）通过生物聚合物在水环境中的稳定分散促进了其潜在的生物和生物医学应用。在这份报告中，我们研究了一个小的图书馆，精确合成的糖共聚物与单糖和二糖基团稳定单壁碳纳米管通过非共价络合在水溶液中的条件。在所测试的糖共聚物中，含有二糖乳糖的糖共聚物证明了SWCNT在水中的有效稳定性，这强烈依赖于碳水化合物密度和聚合物链长度。二糖乳糖的引入潜在地使得糖共聚物与含有单糖的糖共聚物相比不那么灵活，并且促进聚合物在单壁碳纳米管表面上的包裹构象，同时保持纳米管在近红外区域中的固有光致发光。这项工作证明了碳水化合物侧基的身份和聚合物链长度的glycopolymers在水中稳定单壁碳纳米管，这是以前没有实现的协同效应。
Stable dispersions of single-wall carbon nanotubes (SWCNTs) by biopolymers in an aqueous environment facilitate their potential biological and biomedical applications. In this report, we investigated a small library of precision synthesized glycopolymers with monosaccharide and disaccharide groups for stabilizing SWCNTs via noncovalent complexation in aqueous conditions. Among the glycopolymers tested, disaccharide lactose-containing glycopolymers demonstrate effective stabilization of SWCNTs in water, which strongly depends on carbohydrate density and polymer chain length as well. The introduction of disaccharide lactose potentially makes glycopolymers less flexible as compared to those containing monosaccharide and facilitates the wrapping conformation of polymers on the surface of SWCNTs while preserving intrinsic photoluminescence of nanotubes in the near-infrared region. This work demonstrates the synergistic effects of the identity of carbohydrate pendant groups and polymer chain length of glycopolymers on stabilizing SWCNTs in water, which has not been achieved previously.