Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jcis.2010.11.060
Title: Adsorption of chiral aromatic amino acids onto carboxymethyl-β-cyclodextrin bonded Fe3O4/SiO2 core-shell nanoparticles
Authors: Ghosh, S.
Badruddoza, A.Z.M.
Uddin, M.S. 
Hidajat, K. 
Keywords: Adsorption
Amino acids
Carboxymethyl-β-cyclodextrin
Chiral
Magnetic nanoparticles
Surface functionalization
Issue Date: 15-Feb-2011
Citation: Ghosh, S., Badruddoza, A.Z.M., Uddin, M.S., Hidajat, K. (2011-02-15). Adsorption of chiral aromatic amino acids onto carboxymethyl-β-cyclodextrin bonded Fe3O4/SiO2 core-shell nanoparticles. Journal of Colloid and Interface Science 354 (2) : 483-492. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jcis.2010.11.060
Abstract: Surface of magnetic silica nanoparticles is modified by grafting with carboxymethyl-β-cyclodextrin (CM-β-CD) via carbodiimide activation. The functionalized magnetic core-shell nanoparticles (MNPs) are characterized by Transmission Electron Microscopy (TEM), Fourier Transform Infra Red (FTIR) spectroscopy, X-ray Diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS) and Vibrating Sample Magnetometer (VSM). These nano-sized particles are scrutinized for adsorption of certain chiral aromatic amino acid enantiomers namely, d- and l-tryptophan (Trp), d- and l-phenylalanine (Phe) and d- and l-tyrosine (Tyr) from phosphate buffer solutions. Adsorption capacities of the coated magnetic nanoparticles toward amino acid enantiomers are in the order: l-Trp > l-Phe > l-Tyr and under the same condition, adsorption capacities are higher for l-enantiomers than the corresponding d-enantiomers. All the equilibrium adsorption isotherms are fitted well to Freundlich model. FTIR studies depict significant changes after adsorption of amino acids onto nanoparticles. The stretching vibration frequencies of N. H bonds of the amino acid molecules are changed with complex formation through host-guest interaction. The structure and hydrophobicity of amino acid molecules emphasize the interactions between amino acid molecules and the nano-adsorbents bearing cyclodextrin, thus play important roles in the difference of their adsorption behaviors. © 2010 Elsevier Inc.
Source Title: Journal of Colloid and Interface Science
URI: http://scholarbank.nus.edu.sg/handle/10635/88506
ISSN: 00219797
DOI: 10.1016/j.jcis.2010.11.060
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

86
checked on Dec 10, 2018

WEB OF SCIENCETM
Citations

82
checked on Dec 10, 2018

Page view(s)

58
checked on Oct 19, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.