Racemic single-walled carbon nanotubes exhibit circular dichroism when wrapped with DNA

Gordana Dukovic; Milan Balaz; Peter Doak; Nina D. Berova; Ming Zheng; Robert S. Mclean; Louis E. Brus

doi:10.1021/ja062095w

Racemic single-walled carbon nanotubes exhibit circular dichroism when wrapped with DNA

Gordana Dukovic, Milan Balaz, Peter Doak, Nina D. Berova, Ming Zheng, Robert S. Mclean, Louis E. Brus

Integrated Sciences and Engineering Division

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

Abstract

We have found that racemic mixtures of chiral single-walled nanotubes (SWNTs) wrapped with d(GT)₂₀ DNA oligomer exhibit circular dichroism (CD). We attribute the CD signal to induced CD arising from the coupling of transition moments of the SWNTs and the DNA. Although the nanotube mixture appears to contain both enantiomers in equal amounts, DNA-SWNT transition moment interaction is more constructive for one SWNT enantiomer over the other, resulting in an overall CD signal.

Original language	English
Pages (from-to)	9004-9005
Number of pages	2
Journal	Journal of the American Chemical Society
Volume	128
Issue number	28
DOIs	https://doi.org/10.1021/ja062095w
Publication status	Published - 2006 Jul 19

All Science Journal Classification (ASJC) codes

Catalysis
Chemistry(all)
Biochemistry
Colloid and Surface Chemistry

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10.1021/ja062095w

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abstract = "We have found that racemic mixtures of chiral single-walled nanotubes (SWNTs) wrapped with d(GT)20 DNA oligomer exhibit circular dichroism (CD). We attribute the CD signal to induced CD arising from the coupling of transition moments of the SWNTs and the DNA. Although the nanotube mixture appears to contain both enantiomers in equal amounts, DNA-SWNT transition moment interaction is more constructive for one SWNT enantiomer over the other, resulting in an overall CD signal.",

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AU - Dukovic, Gordana

AU - Balaz, Milan

AU - Doak, Peter

AU - Berova, Nina D.

AU - Zheng, Ming

AU - Mclean, Robert S.

AU - Brus, Louis E.

PY - 2006/7/19

Y1 - 2006/7/19

N2 - We have found that racemic mixtures of chiral single-walled nanotubes (SWNTs) wrapped with d(GT)20 DNA oligomer exhibit circular dichroism (CD). We attribute the CD signal to induced CD arising from the coupling of transition moments of the SWNTs and the DNA. Although the nanotube mixture appears to contain both enantiomers in equal amounts, DNA-SWNT transition moment interaction is more constructive for one SWNT enantiomer over the other, resulting in an overall CD signal.

AB - We have found that racemic mixtures of chiral single-walled nanotubes (SWNTs) wrapped with d(GT)20 DNA oligomer exhibit circular dichroism (CD). We attribute the CD signal to induced CD arising from the coupling of transition moments of the SWNTs and the DNA. Although the nanotube mixture appears to contain both enantiomers in equal amounts, DNA-SWNT transition moment interaction is more constructive for one SWNT enantiomer over the other, resulting in an overall CD signal.

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Racemic single-walled carbon nanotubes exhibit circular dichroism when wrapped with DNA

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