Journal of Luminescence, volume 134, pages 448-455

Probing the sensitive and selective luminescent detection of peroxynitrite using thiol-capped CdTe and CdTe@ZnS quantum dots

Oluwasesan Adegoke ¹

Tebello Nyokong ¹

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Department of Chemistry, Rhodes University, Grahamstown, 6140, South Africa. |

Publication type: Journal Article

Publication date: 2013-03-01

Elsevier

Journal: Journal of Luminescence

Quartile SCImago

Quartile WOS

Impact factor: 3.6

ISSN: 00222313

DOI: 10.1016/j.jlumin.2012.08.002

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General Chemistry

Biochemistry

Biophysics

Atomic and Molecular Physics, and Optics

Condensed Matter Physics

Abstract

CdTe and CdTe@ZnS quantum dots (QDs) capped with 3-mercaptopropionic acid (MPA), thioglycolic acid (TGA), or glutathione (GSH) have been employed for the first time as luminescent probes for the sensitive and selective detection of peroxynitrite (ONOO − ) in aqueous solution. The sensitivity of the proposed probe followed the order: MPA– TGA –CdTe@ZnS>GSH– TGA –CdTe@ZnS>MPA–CdTe QDs. The varying degree of quenching is elucidated based on the QD–thiolate bond of CdTe@ZnS being more sensitive to oxidation from ONOO − than CdTe. The selectivity of the probe in the presence of co-existing species followed the order: GSH– TGA –CdTe@ZnS>MPA– TGA –CdTe@ZnS>MPA–CdTe QDs. QDs capped with MPA showed less selectivity for ONOO − than GSH. The best limit of detection (LOD) of 12.6 nM was obtained for MPA– TGA –CdTe@ZnS QDs. Time-resolved fluorescence measurements indicated that the interaction between ONOO − and the QDs is static in nature.

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Adegoke O., Nyokong T. Probing the sensitive and selective luminescent detection of peroxynitrite using thiol-capped CdTe and CdTe@ZnS quantum dots // Journal of Luminescence. 2013. Vol. 134. pp. 448-455.

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RIS Copy

TY - JOUR

DO - 10.1016/j.jlumin.2012.08.002

UR - https://doi.org/10.1016/j.jlumin.2012.08.002

TI - Probing the sensitive and selective luminescent detection of peroxynitrite using thiol-capped CdTe and CdTe@ZnS quantum dots

T2 - Journal of Luminescence

AU - Adegoke, Oluwasesan

AU - Nyokong, Tebello

PY - 2013

DA - 2013/03/01 00:00:00

PB - Elsevier

SP - 448-455

VL - 134

SN - 0022-2313

ER -

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@article{2013_Adegoke,

author = {Oluwasesan Adegoke and Tebello Nyokong},

title = {Probing the sensitive and selective luminescent detection of peroxynitrite using thiol-capped CdTe and CdTe@ZnS quantum dots},

journal = {Journal of Luminescence},

year = {2013},

volume = {134},

publisher = {Elsevier},

month = {mar},

url = {https://doi.org/10.1016/j.jlumin.2012.08.002},

pages = {448--455},

doi = {10.1016/j.jlumin.2012.08.002}

}

Found error?

Publisher

Elsevier

Journal

Journal of Luminescence

Quartile SCImago

Quartile WOS

Impact factor

3.6

ISSN

00222313 (Print)