On the mechanism of lead chalcogenide nanocrystal formation

被引：261

作者：

Steckel, Jonathan S. ^{[1
]}

Yen, Brian K. H. ^{[1
]}

Oertel, David C. ^{[1
]}

Bawendi, Moungi G. ^{[1
]}

机构：

[1] MIT, Dept Chem, Cambridge, MA 02139 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2006年 / 128卷 / 40期

关键词：

D O I：

10.1021/ja062626g

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

On the basis of evidence from 31P NMR spectroscopy, and using PbSe as a model, we propose two simultaneous mechanisms through which "monomers" are formed in preparations of lead chalcogenide nanocrystals (NCs). In one mechanism, selenium is delivered as a Se2- species, whereas in the other, Se0 reacts with metal already reduced by the organophosphine. This latter mechanism helps explain the sensitivity of NC preparations to the purity of organophosphines and allows the rational modification of batch NC reactions to increase yield. Copyright © 2006 American Chemical Society.

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页码：13032 / 13033

页数：2

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