Mechanistic Study of the Synthesis of CdSe Nanocrystals: Release of Selenium

作者：Garcia Rodriguez Raul; Liu Haitao^*

来源：Journal of the American Chemical Society, 2012, 134(3): 1400-1403.

DOI：10.1021/ja209246z

We outline a reaction pathway for the cleavage of the P=Se bond in trialkylphosphine selenide during the synthesis of CdSe nanocrystals. The reaction between cadmium carboxylate and trimethylphosphine selenide in the presence of an alcohol produces alkoxytrimethylphosphonium (2). Control experiments and density functional theory calculations suggested that the cleavage of the P=Se bond is initiated by nucleophilic attack of carboxylate on a Cd2+-activated phosphine selenide to produce an acyloxytrialkylphosphonium intermediate (1), which is converted to 2 in the presence of an alcohol.

• 出版日期2012-1-25