Sun Haochen, Wang Fudong, Buhro William E
Department of Chemistry and Institute of Materials Science and Engineering , Washington University , St. Louis , Missouri 63130-4899 , United States.
ACS Nano. 2018 Dec 26;12(12):12393-12400. doi: 10.1021/acsnano.8b06468. Epub 2018 Nov 21.
Preparations of CdTe quantum platelets, magic-size (CdTe) nanoclusters, and CdTe quantum wires are described using (MeN)PTe (with (MeN)P) as a Te precursor. The (MeN)PTe/(MeN)P precursor mixture is shown to be more reactive than mixtures of trialkylphosphine tellurides and the corresponding trialkylphosphines, RPTe/RP, which are commonly employed in nanocrystal syntheses. For syntheses conducted in primary amine solvents, (MeN)PTe and (MeN)P undergo a transamination reaction, affording (MeN) (RHN)PTe and (MeN) (RHN)P (R = n-octyl or oleyl). The transaminated (MeN) (RHN)PTe derivatives are shown to be the likely Te precursors under those conditions. The enhanced reactivities of the tris(amino)phosphine tellurides are ascribed to increased nucleophilicity due to the amino-N lone pairs.
本文描述了使用(MeN)PTe（与(MeN)P）作为碲前驱体来制备碲化镉量子片、魔尺寸（CdTe）纳米团簇和碲化镉量子线的方法。结果表明，(MeN)PTe/(MeN)P前驱体混合物比通常用于纳米晶体合成的三烷基膦碲化物和相应的三烷基膦的混合物RPTe/RP更具反应活性。对于在伯胺溶剂中进行的合成，(MeN)PTe和(MeN)P会发生转氨反应，生成(MeN)(RHN)PTe和(MeN)(RHN)P（R = 正辛基或油基）。结果表明，在这些条件下，转氨后的(MeN)(RHN)PTe衍生物可能是碲前驱体。三（氨基）膦碲化物反应活性的增强归因于氨基氮孤对导致的亲核性增加。
