Interaction of anthranilic acid with silver nanoparticles: A Raman, surface-enhanced Raman scattering and density functional theoretical study

被引：16

作者：

Chadha, Ridhima ^{[1
]}

Maiti, Nandita ^{[1
]}

Kapoor, Sudhir ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Radiat & Photochem Div, Bombay 400085, Maharashtra, India

来源：

JOURNAL OF MOLECULAR STRUCTURE | 2014年 / 1076卷

关键词：

Anthranilic acid; Surface-enhanced Raman scattering; DFT; Adsorption; Orientation; COLLOIDAL SILVER; SERS; ADSORPTION; DFT; SPECTROSCOPY; PYRIDINE; ORIENTATION; PARTICLES; MOLECULES; SPECTRA;

D O I：

10.1016/j.molstruc.2014.07.042

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Raman and surface-enhanced Raman scattering (SERS) studies of anthranilic acid have been investigated in solid, aqueous solution and on silver colloid. Anthranilic acid plays a key role in the brain in the production of quinolinic acid which is a powerful excitant and convulsant substance. Due to its medicinal importance, the surface adsorption properties of anthranilic acid have been studied. The experimental Raman and SERS data is supported with DFT calculations using B3LYP functional with aug-cc-pvdz and LANL2DZ basis sets. The comparison of experimental and theoretical results infers that anthranilate is chemisorbed to the silver surface directly through the carboxylate group with a perpendicular orientation. The time-dependent SERS spectrum of anthranilate showed no observable change indicating no structural transformation with time. The SERS spectrum recorded at different excitation wavelengths helped in understanding the origin of the SERS mechanism. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：35 / 41

页数：7

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