Szczegóły publikacji
Opis bibliograficzny
Interaction of N-benzylamino(boronphenyl)-methylphosphonic acid analogs with the gold colloidal surface under different concentration and pH conditions / Natalia Piergies, Edyta PRONIEWICZ, Younkyoo Kim, Leonard M. Proniewicz // Journal of Raman Spectroscopy ; ISSN 0377-0486. — 2014 — vol. 45 iss. 7 spec. iss., s. 581–590. — Bibliogr. s. 589. — European Conference on Nonlinear Optical Spectroscopy (ECONOS 2013) : 22-24 April 2013 Exeter (UK)
Autorzy (4)
- Piergies Natalia
- AGHProniewicz Edyta
- Kim Younkyoo
- Proniewicz Leonard M.
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 86845 |
|---|---|
| Data dodania do BaDAP | 2015-01-21 |
| Tekst źródłowy | URL |
| DOI | 10.1002/jrs.4505 |
| Rok publikacji | 2014 |
| Typ publikacji | referat w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Journal of Raman Spectroscopy |
Abstract
In this study, we present surface-enhanced Raman spectroscopy (SERS) investigations of five analogs of a novel group of N-benzylamino(boronphenyl)methylphosphonic acids: N-benzylamino-(3-boronphenyl)-S-methylphosphonic acid (m-PhS), N-benzylamino-(4-boronphenyl)-S-methylphosphonic acid (p-PhS), N-benzylamino-(2-boronphenyl)-R-methylphosphonic acid (o-PhR), N-benzylamino-(3-boronphenyl)-R-methylphosphonic acid (m-PhR), and N-benzylamino-(4-boronphenyl)-R-methylphosphonic acid (p-PhR) deposited onto 10-nm gold nanoparticles in an aqueous solution at physiological pH (pH = 7). In addition, for the p-PhR molecule, the SERS spectra in the various conditions of pH levels of the solutions (from pH = 3 to 11) and phosphonic acid concentration (10(-3)-10(-5) M) were measured. In general, the SERS spectral profiles indicate that at pH = 7, all of the aforementioned molecules interact with the colloidal gold surface via a boronphenyl ring. However, the orientation of the boronphenyl ring onto the substrate surface is different for each of the studied molecules. The boronic acid group of p-PhS and p-PhR binds to the gold nanoparticles, whereas the phosphonic acid group assists in the interaction with the substrate for p-PhR only. For all the molecules, the -CLC alpha(P)N-fragment distinctly influences the molecule/gold interactions, especially in the case of o-PhR. The previous differences in the compound behavior at the gold/liquid interface underline the role of an absolute configuration (-R and -S) and a type of isomer (orto-, meta-, and para-) on the SERS signals, which means their influence on the adsorbate geometry. Additionally, based on the SERS results for p-PhR in various environmental conditions, we draw conclusions about spectral changes (adsorbate geometry changes) as a result of the pH of solution and molecule concentration alternations. Copyright (C) 2014 John Wiley & Sons, Ltd.
