β-Cyclodextrin functionalized Mn-doped ZnS quantum dots for the chiral sensing of tryptophan enantiomers
Polymer Chemistry, ISSN: 1759-9962, Vol: 6, Issue: 4, Page: 591-598
2015
- 57Citations
- 37Captures
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Article Description
Hydrothermally prepared mono-6-SH-β-cyclodextrin capped Mn-doped ZnS quantum dots (β-CD-Mn-ZnS QDs) exhibited dual photoluminescence (PL) at 430 nm and 598 nm, respectively, upon excitation at 315 nm. The PL intensity of β-CD-Mn-ZnS QDs responded to tryptophan enantiomers differently: the d-isomer showed little effect while l-tryptophan displayed a large time-dependent enhancement in the PL intensity of QDs. This chiral selectivity originated from the β-cyclodextrin coating on the surface of Mn-ZnS QDs, which shows different inclusion constants for tryptophan enantiomers. β-CD-Mn-ZnS QDs further selectively hydrolyse l-tryptophan, forming a product that greatly enhances the QD photoluminescence. Based on these findings, a photoluminescence chiral-assay for tryptophan enantiomers was developed. l-Tryptophan can be detected in the presence of its stereoisomer with a detection limit of 5.4 nM in a linear range of 0-6.0 μM.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84920018680&origin=inward; http://dx.doi.org/10.1039/c4py00618f; http://xlink.rsc.org/?DOI=C4PY00618F; http://pubs.rsc.org/en/content/articlepdf/2015/PY/C4PY00618F; https://xlink.rsc.org/?DOI=C4PY00618F; https://dx.doi.org/10.1039/c4py00618f; https://pubs.rsc.org/en/content/articlelanding/2015/py/c4py00618f
Royal Society of Chemistry (RSC)
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