Jump to main content
Jump to site search

Issue 9, 2015
Previous Article Next Article

The application of l-tryptophan functionalized graphene-supported platinum nanoparticles for chiral recognition of DOPA enantiomers

Author affiliations

Abstract

A new nanocomposite of L-tryptophan functionalized graphene-supported platinum nanoparticles (L-Trp-rGO@PtNPs) was synthesized utilizing a facile ultrasonic method via π–π conjugate action between graphene-supported platinum nanoparticles and L-tryptophan (L-Trp) molecules. The prepared nanomaterial, which dispersed well in water and presented excellent conductivity, was modified on a glassy carbon electrode (L-Trp-rGO@PtNPs/GCE) for the chiral sensing of DOPA enantiomers. The immobilization process of L-Trp-rGO@PtNPs/GCE was characterized by cyclic voltammetry, electrochemical impedance spectroscopy, scanning electron microscopy, ultraviolet-visible (UV-vis) spectrometry and Raman spectroscopy. The electrochemical reactions of DOPA enantiomers were investigated via differential pulse voltammetry. The proposed electrochemical method showed excellent enantiospecificity for DOPA enantiomers and exhibited a stronger enantiospecificity for D-DOPA. In addition, the experimental parameters such as the concentration, the amount of L-Trp-rGO@PtNPs and the pH values were optimized. Under optimum conditions, the linear response ranges for the discrimination of DOPA were from 5.0 × 10−8 to 5.0 × 10−3 mol L−1 with a detection limit of 1.7 × 10−8 mol L−1 (S/N = 3).

Graphical abstract: The application of l-tryptophan functionalized graphene-supported platinum nanoparticles for chiral recognition of DOPA enantiomers

Back to tab navigation

Article information


Submitted
06 Feb 2015
Accepted
29 Jun 2015
First published
29 Jun 2015

New J. Chem., 2015,39, 6919-6924
Article type
Paper

The application of L-tryptophan functionalized graphene-supported platinum nanoparticles for chiral recognition of DOPA enantiomers

Y. Chen, J. Xu, C. Chen, D. Guo and Y. Fu, New J. Chem., 2015, 39, 6919
DOI: 10.1039/C5NJ00303B

Social activity

Search articles by author

Spotlight

Advertisements