Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9675949 | Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2005 | 5 Pages |
Abstract
Surface-enhanced Raman scattering (SERS) spectroscopy has been used to explore the recognition mechanism between a selenium-containing glutathione peroxidase (GPX) mimic, 2,2â²-diseleno-bis-β-cyclodextrin (2-SeCD) and two glutathione (GSH) alternatives, S-dinitrophenyl-glutathione (GSH-S-DNP) and 4,4â²-bis(carboxymethyleneoxy)azobenzene (BCMAB). SERS spectra have been employed to investigate how these alternatives bind with β-CD and 2-SeCD. SERS signals of the spectra of GSH-S-DNP and BCMAB are much intense in comparison with those of theirs complexes, GSH-S-DNP/CDs and BCMAB/CDs in silver colloid solutions, which suggest that GSH-S-DNP and BCMAB are included into the CD cavity when they bind with β-CD or 2-SeCD. Weak Raman signals in the SERS spectra of the GSH-S-DNP/CDs in silver colloid solution make it difficult to investigate the recognition mechanism between CDs and GSH-S-DNP by using SERS efficiently. The bands at 1388 and 1379 cmâ1 in the SERS spectra of BCMAB/CDs strongly suggest that BCMAB does not bind with β-CD or 2-SeCD via its COOH group.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
Ya-Qiong Hao, Yuqing Wu, Lixin Wu, Junqiu Liu, Guimin Luo,