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Metal-free Inorganic Ligands for Colloidal Nanocrystals: S2–, HS–, Se2–, HSe–, Te2–, HTe–, TeS32–, OH–, and NH2–as Surface Ligands
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2011-07-13 , DOI: 10.1021/ja2029415
Angshuman Nag 1 , Maksym V. Kovalenko 1 , Jong-Soo Lee 1 , Wenyong Liu 1 , Boris Spokoyny 1 , Dmitri V. Talapin 1, 2
Affiliation  

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.

中文翻译:

用于胶体纳米晶体的无金属无机配体:S2–、HS–、Se2–、HSe–、Te2–、HTe–、TeS32–、OH– 和 NH2– 作为表面配体

通过用不含金属的无机离子如 S(2-)、HS(-)、Se(2-)、HSe(-)、Te(2-) 取代化学合成纳米晶体上的有机封端配体,合成了全无机胶体纳米晶体。 )、HTe(-)、TeS(3)(2-)、OH(-) 和 NH(2)(-)。这些简单的配体粘附在 NC 表面并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被证明适用于不同尺寸和形状的各种半导体和金属纳米晶体。我们表明,最初为金属配位化合物开发的 Pearson 硬酸和软酸碱 (HSAB) 原理的关键方面可以应用于分子物种与纳米晶体表面的键合。
更新日期:2011-07-13
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