Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India.
Langmuir. 2012 Aug 28;28(34):12432-7. doi: 10.1021/la3020783. Epub 2012 Aug 13.
Reduced-graphene oxide (rGO) sheets have been functionalized by covalently linking β-cyclodextrin (β-CD) cavities to the sheets via an amide linkage. The functionalized β-CD:rGO sheets, in contrast to rGO, are dispersible over a wide range of pH values (2-13). Zeta potential measurements indicate that there is more than one factor responsible for the dispersibility. We show here that planar aromatic molecules adsorbed on the rGO sheet as well as nonplanar molecules included in the tethered β-CD cavities have their fluorescence effectively quenched by the β-CD:rGO sheets. The β-CD:rGO sheets combine the hydrophobicity associated with rGO along with the hydrophobicity of the cyclodextrin cavities in a single water-dispersible material.
还原氧化石墨烯 (rGO) 片通过酰胺键将β-环糊精 (β-CD) 空腔共价连接到片上进行功能化。与 rGO 相比，功能化的 β-CD:rGO 片在很宽的 pH 值范围内（2-13）可分散。Zeta 电位测量表明，分散性不仅仅取决于一个因素。我们在这里表明，吸附在 rGO 片上的平面芳香族分子以及连接的 β-CD 空腔中包含的非平面分子的荧光都被 β-CD:rGO 片有效地猝灭。β-CD:rGO 片将与 rGO 相关的疏水性以及环糊精空腔的疏水性结合在单一的水可分散材料中。
