Department of Chemistry and James Frank Institute, University of Chicago, Illinois 60637, USA.
J Am Chem Soc. 2011 Jul 13;133(27):10612-20. doi: 10.1021/ja2029415. Epub 2011 Jun 17.
All-inorganic colloidal nanocrystals were synthesized by replacing organic capping ligands on chemically synthesized nanocrystals with metal-free inorganic ions such as S(2-), HS(-), Se(2-), HSe(-), Te(2-), HTe(-), TeS(3)(2-), OH(-) and NH(2)(-). These simple ligands adhered to the NC surface and provided colloidal stability in polar solvents. The versatility of such ligand exchange has been demonstrated for various semiconductor and metal nanocrystals of different size and shape. We showed that the key aspects of Pearson's hard and soft acids and bases (HSAB) principle, originally developed for metal coordination compounds, can be applied to the bonding of molecular species to the nanocrystal surface. The use of small inorganic ligands instead of traditional ligands with long hydrocarbon tails facilitated the charge transport between individual nanocrystals and opened up interesting opportunities for device integration of colloidal nanostructures.
通过用无机组分如 S(2-), HS(-), Se(2-), HSe(-), Te(2-), HTe(-), TeS(3)(2-), OH(-) 和 NH(2)(-) 来替代化学合成纳米晶表面的有机配体，合成了全无机胶体纳米晶。这些简单的配体附着在 NC 表面，在极性溶剂中提供胶体稳定性。这种配体交换的多功能性已经在不同尺寸和形状的各种半导体和金属纳米晶中得到了证明。我们表明，最初为金属配合物开发的 Pearson 硬酸和软碱（HSAB）原理的关键方面可以应用于分子物种与纳米晶表面的键合。使用小的无机配体代替具有长烃尾的传统配体，促进了单个纳米晶之间的电荷输运，并为胶体纳米结构的器件集成开辟了有趣的机会。
