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J Am Chem Soc. 2009 Aug 5;131(30):10342-3. doi: 10.1021/ja902800f.

Optical activity and chiral memory of thiol-capped CdTe nanocrystals.

Author information

1
Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan. ntaku@ms.naist.jp

Abstract

CdTe nanocrystals (NCs) passivated with chiral ligands d- and l-cysteinemethylester hydrochloride were prepared and observed to exhibit characteristic CD profiles with symmetrical mirror images depending on the chirality of the capping ligand. The optical activity of CdTe NCs is shown to originate from the distorted CdS shell including chiral capping molecules. The chirality of the NC surface is maintained even after ligand exchange with an achiral thiol, providing an unprecedented chiral memory effect.

PMID:
19588974
DOI:
10.1021/ja902800f

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