Achiral CdSe quantum dots exhibit optical activity in the visible region upon post-synthetic ligand exchange with D- or L-cysteine

Urice Tohgha; Krisztina Varga; Milan Balaz

doi:10.1039/C3CC37987F

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Chemical Communications

Issue 18, 2013

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Achiral CdSe quantum dots exhibit optical activity in the visible region upon post-synthetic ligand exchange with D- or L-cysteine

Urice Tohgha,^a Krisztina Varga^a and Milan Balaz*^a

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University of Wyoming, 1000 E. University Avenue, Laramie, USA
E-mail: mbalaz@uwyo.edu ;
Fax: +1 307 766-2807 ;
Tel: +1 307 766-4330

Chem. Commun., 2013,49, 1844-1846

DOI: 10.1039/C3CC37987F
Received 05 Nov 2012, Accepted 20 Jan 2013
First published online 22 Jan 2013

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Semiconductor cadmium selenide (CdSe) quantum dots (QDs) exhibited mirror-image circular dichroism (CD) spectra in the visible region (350–570 nm) after replacing the trioctylphosphine oxide/oleic acid ligands on achiral nanocrystals with D- and L-cysteines. Chiroptical properties of cysteine-capped CdSe QDs depend on their size and can be fine-tuned by changing the radius of QDs.

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