Synthesis coordination shell reactions

This method has also been successfully applied in the synthesis of Cu(II)-containing LDHs, although well crystallized materials are difficult to prepare as a consequence of the Jahn-Teller distortion found in the coordination shell of Cu(II) [70,71]. Incorporation of Ni(II) in the layers was found to improve the crystallinity and structural stability of such LDHs. For the synthesis of Cu/Ni/Al - CO3 and Cu/Ni/Mg/Al - CO3 LDHs [70] by the method with separate nucleation and aging steps, LDHs with both smaller particle size and narrower distribution of particle size were obtained compared with those prepared using a conventional coprecipitation method, similar to the case for Mg/Al-C03 LDHs [20]. Well crystallized Cu/Ni/Cr-COs LDHs [71] were obtained when the Cu/Ni/Cr atom ratio ranged from 1 2 1 to 1 3 1 in the reaction mixture with hydrothermal aging conditions at 180 °C for 4 h. 

The formation of nonspherical particles can be s mthesized by the growth of the spherical particles by variation of reaction conditions. For example, rodlike CdSe/CdS core-shell particles have grown from the spherical CdSe nanocrystals (Fig. 3 a, b) [146]. At the first stage of the synthesis, CdSe core nanocrystals with narrow size distributions (Figure 3 a) were synthesized in the coordinating solvent mixture of hexadecylamine (HDAm), tri-n-octylphosphine oxide (TOPO), and tri-n-... 

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