SURFACE-ENHANCED RAMAN-SCATTERING INTERACTION OF PARA-AMINOBENZOIC ACID ON A SILVER-COATED ALUMINA SUBSTRATE

被引：16

作者：

BELLO, JM ^{[1
]}

NARAYANAN, VA ^{[1
]}

VO-DINH, T ^{[1
]}

机构：

[1] OAK RIDGE NATL LAB, DIV HLTH & SAFETY RES, ADV MONITORING DEV GRP, OAK RIDGE, TN 37381 USA

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 1992年 / 48卷 / 04期

关键词：

D O I：

10.1016/0584-8539(92)80047-Z

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

The adsorption behavior of p-aminobenzoic acid (PABA) molecules on a silver-coated alumina surface-enhanced Raman scattering (SERS) substrate was investigated. For spotted PABA and PABA in non-polar solvents, the PABA molecule is adsorbed flat on the surface of the SERS substrate. In this orientation, the benzene ring is pi-bonded to the substrate, and the molecule is further anchored to the substrate by the binding of the lone pairs of NH2 and COO- groups onto the metal surface. On the other hand, the adsorption behavior of PABA in a polar solvent is greatly influenced by the hydrogen bonding of the amine group with the polar solvent. In this orientation, the molecule is preferentially adsorbed through the COO- and assumes a non-flat orientation on the metal surface.

引用

页码：563 / 567

页数：5

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