NDLI: Colorimetric chiral discrimination and determination of enantiometric excess of D/L-tryptophan using silver nanoparticles

Content Provider	Springer Nature Link
Author	Liu, Cunwei Li, Baoxin Xu, Chunli
Copyright Year	2014
Abstract	We report on a method for visual differentiation between the D- and L-forms of tryptophan (Trp). It is based on the inherent chirality of citrate-capped silver nanoparticles (AgNPs; ca. 15 nm in diameter) that can be used as chiral selector for D- and L-forms of Trp. On addition of D-Trp to a solution of the AgNPs, a color change from yellow to red can be seen, while no color change is found on addition of L-Trp. The chiral assay can be used to determine the enantiometric excess of D-Trp in the range from −50 % to 100 %. The effect can be detected with bare eyes and quantified by spectrophotometry. Notably, this method does not require any labeling or chiral modification. The method excels by its sensitivity, low cost, good availability of materials, and its simplicity. Figure 1 The silver nanoparticles can discriminate the absolute configuration of Trp and determine the enantiomeric excess of Trp
Starting Page	1407
Ending Page	1413
Page Count	7
File Format	PDF
ISSN	00263672
Journal	Microchimica Acta
Volume Number	181
Issue Number	11-12
e-ISSN	14365073
Language	English
Publisher	Springer Vienna
Publisher Date	2014-05-18
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Chiral recognition Visual detection Silver nanoparticles Colorimetric probes Nanochemistry Nanotechnology Characterization and Evaluation of Materials Analytical Chemistry Microengineering
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry

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