Three-monolayer CdSe nanoplatelets having the composition (CdSe)₃[Cd(OAc)_0.77(oleate)_1.23]_0.78, large lateral dimensions, minimal strain distortions, and the zinc-blende crystal structure undergo Z-type to L-type ligand exchange with ethylenediamine, affording NPLs of composition (CdSe)₃[en]_0.67 (en = ethylenediamine). The L-type ligation of the (CdSe)₃[en]_0.67 (en = ethylenediamine) NPLs is exchanged for Z-type ligation with Cd(oleate)₂, Cd(OAc)₂, CdCl₂, Zn(oleate)₂, and ZnCl₂, giving NPLs having near to the ideal compositions of (CdSe)₃[MX₂]. All of the Z-type to L-type and L-type to Z-type ligand exchanges are kinetically slow, requiring several hours to reach completion, suggesting that a considerable surface reconstruction is required. In contrast, three-monolayer NPLs having a significant rolling distortion and four- and five-monolayer NPLs having small lateral dimensions are unstable to ethylenediamine, and Z-type to L-type ligand exchange is not achieved.

中文翻译：

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锌-混合硒化镉纳米片上的可逆Z型到L型配体交换

具有（CdSe）₃ [Cd（OAc）_0.77（油酸酯）_1.23 ] _0.78组成的三层CdSe纳米片，横向尺寸大，应变变形最小，闪锌矿晶体结构经过Z型到L型配体交换用乙二胺，得到组成（CdSe）₃ [en] _0.67（en =乙二胺）的不良贷款。将（CdSe）₃ [en] _0.67（en =乙二胺）NPL的L型连接与Cd（油酸酯）₂，Cd（OAc）₂，CdCl ₂，Zn（油酸酯）₂，和ZnCl ₂，得到的NPL具有接近（CdSe）₃ [MX ₂ ]的理想组成。从Z型到L型以及从L型到Z型配体的所有交换都是动力学缓慢的，需要几个小时才能完成，这表明需要进行大量的表面重建。相反，具有明显的轧制变形的三单层NPL和横向尺寸小的四和五单层NPL对于乙二胺是不稳定的，并且不能实现Z型到L型配体的交换。