7-Mercapto-4-methylcoumarin as a reporter of thiol binding to the CdSe quantum dot surface

María González-Béjar; Mathieu Frenette; Larissa Jorge; J. C. Scaiano

doi:10.1039/B900606K

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7-Mercapto-4-methylcoumarin as a reporter of thiol binding to the CdSe quantum dot surface†

María González-Béjar,^a Mathieu Frenette,^a Larissa Jorge^a and J. C. Scaiano*^a

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* Corresponding authors

^a Department of Chemistry and Centre for Catalysis Research and Innovation, University of Ottawa, Ottawa, Ontario, Canada
E-mail: tito@photo.chem.uottawa.ca
Fax: +1 613 562 5633

Abstract

Interaction of 7-mercapto-4-methylcoumarin with the surface of core–shell CdSe–ZnS quantum dots leads to characteristic absorption and emission bands that are excellent reporters for thiol interactions at the nanoparticle surface.

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Supplementary files

Synthesis of (Cm-S-) ₂, ¹H-NMR of QD485, Cm-SH and their mixture, effect of (Cm-S-) ₂ on core–shell QD485, UV-visible spectra of Cm-SH at ratios [Cm-SH] : QD up to 30, aging effect on (Cm-S) _n–QD485 fluorescence intensity, (Cm-S) _n–QD485 excitation and emission spectra, UV-visible and emission spectra of Cm-SH in basic or acid methanol, emission spectra and time profiles of core–shell QD485 and QD550 upon addition of Cm-SH, core–shell QD485, QD550, core CdSe QD558 and (Cm-S) _n–QD lifetimes, procedure for the synthesis of core CdSe QD558, its absorption and emission spectra in absence or in presence of Cm-SH and the corresponding time-resolved experiments and Stern–Volmer plot for the quenching of core–shell QD485 and core CdSe QD558 by Cm-SH PDF (1264K)

Article information

DOI: https://doi.org/10.1039/B900606K
Article type: Communication
Submitted: 12 Jan 2009
Accepted: 08 Apr 2009
First published: 23 Apr 2009

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Chem. Commun., 2009, 3202-3204

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7-Mercapto-4-methylcoumarin as a reporter of thiol binding to the CdSe quantum dot surface

M. González-Béjar, M. Frenette, L. Jorge and J. C. Scaiano, Chem. Commun., 2009, 3202 DOI: 10.1039/B900606K

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Chemical Communications

7-Mercapto-4-methylcoumarin as a reporter of thiol binding to the CdSe quantum dot surface†

Abstract

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7-Mercapto-4-methylcoumarin as a reporter of thiol binding to the CdSe quantum dot surface

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