article · Chirality · 2021
Chiral voltammetric sensor for tryptophan enantiomers by using a self‐assembled multiwalled carbon nanotubes/polyaniline/sodium alginate composite
Xiaohui Niu, Xing Yang, Hongxia Li, Qiuyun Shi, Kunjie Wang
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Abstract
Due to the crucial role of amino acids in life sciences and pharmaceutics, identification of optical amino acid molecules is of great significance. In this study, the two materials (CNT and PANI) were combined together to obtain the magnification of electrochemical signal by substrate material (CNT/PANI). Then a self-assembled multiwalled carbon nanotubes/polyaniline/sodium alginate (CNT/PANI/SA) nanocomposite with chiral sites and conductive material was synthesized as the electrochemical sensing interface. Next, a novel electrochemical sensing interface was fabricated via modifying the as-prepared chiral material on a polished glassy carbon electrode (CNT/PANI/SA/GCE) for precisely, efficiently, and rapidly differentiation of tryptophan (Trp) enantiomers. It was observed that CNT/PANI/SA/GCE showed desirable stereoselective recognition effect in the variety of signal strength to peak current (Ip) to the different optical activity of Trp enantiomers. In the case of optimal conditions, the peak current ratio in the solution of l-Trp and d-Trp (I<sub>D</sub> /I<sub>L</sub> ) was observed to be 2.1 at CNT/PANI/SA/GCE by differential pulse voltammogram (DPV). UV-visible spectroscopy further showed that CNT/PANI/SA had a greater binding energy to l-Trp. Also different factors affecting the enantioselectivity of CNT/PANI/SA/GCE, such as the incubation time, pH, and dropcoating volume of CNT/PANI/SA were optimized. Moreover, the proposed CNT/PANI/SA/GCE showed excellent specific stereoselectivity and anti-interference ability. Besides, the proposed chiral sensing platform can be effectively applied in real samples to detect Trp enantiomers sensitively. This work inspires us a new path for the preparation of substrate material with excellent electrical conductivity, as well as extend its application potential in chiral recognition.
Cite this paper
Niu, X., Yang, X., Li, H., Shi, Q., & Wang, K. (2021). Chiral voltammetric sensor for tryptophan enantiomers by using a self‐assembled multiwalled carbon nanotubes/polyaniline/sodium alginate composite. Chirality, 33(5), 248–260. https://doi.org/10.1002/chir.23305
Niu, Xiaohui, et al. “Chiral voltammetric sensor for tryptophan enantiomers by using a self‐assembled multiwalled carbon nanotubes/polyaniline/sodium alginate composite.” Chirality, vol. 33, no. 5, 2021, pp. 248–60, https://doi.org/10.1002/chir.23305.
Niu, Xiaohui, Xing Yang, Hongxia Li, Qiuyun Shi, and Kunjie Wang. 2021. “Chiral voltammetric sensor for tryptophan enantiomers by using a self‐assembled multiwalled carbon nanotubes/polyaniline/sodium alginate composite.” Chirality 33 (5): 248–60. https://doi.org/10.1002/chir.23305.
Niu, X. et al. (2021) ‘Chiral voltammetric sensor for tryptophan enantiomers by using a self‐assembled multiwalled carbon nanotubes/polyaniline/sodium alginate composite’, Chirality, 33(5), pp. 248–260. Available at: https://doi.org/10.1002/chir.23305.
@article{niu2021chiral,
title = {{Chiral voltammetric sensor for tryptophan enantiomers by using a self‐assembled multiwalled carbon nanotubes/polyaniline/sodium alginate composite}},
author = {Niu, Xiaohui and Yang, Xing and Li, Hongxia and Shi, Qiuyun and Wang, Kunjie},
journal = {Chirality},
volume = {33},
number = {5},
pages = {248--260},
year = {2021},
doi = {10.1002/chir.23305}
}Made from the index record. Check names, capitalisation and page numbers against the paper. Need another style? AI for Research has over 10,000.