Room-Temperature Formation of CdTeSe Magic-Size Clusters from Oleate-Capped CdTe Precursor Compounds via CdSe Monomer Substitution,Inorganic Chemistry

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Room-Temperature Formation of CdTeSe Magic-Size Clusters from Oleate-Capped CdTe Precursor Compounds via CdSe Monomer Substitution
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2024-06-04 , DOI: 10.1021/acs.inorgchem.4c01775
Jie Hu ₁ , Yusha Yang ₁ , Qiu Shen ₁ , Shasha Wang ₁ , Xiaoqin Chen ₁ , Chaoran Luan ₂ , Kui Yu _{1,

3}

Affiliation

We report the first room-temperature synthesis of ternary CdTeSe magic-size clusters (MSCs) that have mainly the surface ligand oleate (OA). The MSCs display sharp optical absorption peaking at ∼399 nm and are thus referred to as MSC-399. They are made from prenucleation-stage samples of binary CdTe and CdSe, which are prepared by two reactions in 1-octadecene (ODE) of cadmium oleate (Cd(OA)₂) and tri-n-octylphosphine chalcogenide (ETOP, E = Te and Se) at 25 °C for 120 min and 80 °C for 15 min, respectively. When the two binary samples are mixed at room temperature and dispersed in a mixture of toluene (Tol) and octylamine (OTA), the CdTeSe MSC-399 develops. Also, when the CdSe sample is added to CdTe MSC-371 in a dispersion, the transformation from CdTe MSC-371 to CdTeSe MSC-399 is seen. We propose that the MSCs develop from their precursor compounds (PCs) that are relatively transparent in optical absorption, such as CdTeSe MSC-399 from CdTeSe PC-399 and CdTe MSC-371 from CdTe PC-371. The formation of CdTeSe PC-399 undergoes monomer substitution and not anion exchange, which is the reaction of CdTe PC-371 and the CdSe monomer to produce CdTeSe PC-399 and the CdTe monomer. Our study provides evidence of monomer substitution for the transformation from binary CdTe to ternary CdTeSe PCs.

中文翻译：

通过 CdSe 单体取代，在室温下从油酸酯封端的 CdTe 前体化合物形成 CdTeSe 魔幻尺寸团簇

我们首次在室温下合成了主要具有表面配体油酸酯（OA）的三元 CdTeSe 幻尺寸簇（MSC）。 MSC 在 ~399 nm 处显示出尖锐的光学吸收峰，因此被称为 MSC-399。它们由二元 CdTe 和 CdSe 的预成核阶段样品制成，这些样品是通过油酸镉 (Cd(OA) ₂ ) 和三正辛基膦硫属化物 (ETOP，E = Te) 的 1-十八碳烯 (ODE) 中的两个反应制备的。和 Se) 分别在 25°C 120 分钟和 80°C 15 分钟。当两种二元样品在室温下混合并分散在甲苯 (Tol) 和辛胺 (OTA) 的混合物中时，就会形成 CdTeSe MSC-399。此外，当将 CdSe 样品添加到分散体中的 CdTe MSC-371 中时，可以看到从 CdTe MSC-371 到 CdTeSe MSC-399 的转变。我们建议MSC从光吸收相对透明的前体化合物（PC）发展而来，例如CdTeSe PC-399的CdTeSe MSC-399和CdTe PC-371的CdTe MSC-371。 CdTeSe PC-399 的形成经历了单体取代而不是阴离子交换，这是 CdTe PC-371 和 CdSe 单体反应生成 CdTeSe PC-399 和 CdTe 单体。我们的研究为从二元 CdTe 到三元 CdTeSe PC 的转变提供了单体替代的证据。

更新日期：2024-06-04

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