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                            Library & Multimedia
 Raman and Surface Enhanced Raman Spectra of Chrysin Apigenin and Luteolin
NCJ Number
              255329
Journal

*Journal of Raman Spectroscopy* Volume: 49 Issue: 2 Dated: 2009 Pages: 190-195
Author(s)
          Charlie Corredor;
                        Tatyana Teslova;
                        Zhanguo Chen;
                        Jie Zhang;
                        Maria V. Canamares;
                        John R. Lombardi;
                        Marco Leona
Date Published

2009
Length
              6 pages
Annotation
              This article reports on a project that obtained the FT-Raman and surface-enhanced Raman (SER) spectra of three flavonoids, chrysin, apigenin, and luteolin.
Abstract
              The SER spectra were obtained on citrate reduced Ag colloids. Assignments of the experimentally obtained normal vibrational modes were aided by density functional theory (DFT) calculations using the B3LYP functional and the 6-31+G* basis set. Excellent fits were obtained for the observed spectra with little or no scaling. The most intense lines in the three flavonoids SERS spectra are those in the Cdouble bondO stretching region and around 1250 cm−1. The first ones are often weakened by proximity of the metal surface, whereas the latter are not affected by the Ag. On the other hand, the lines at lower wave numbers, assigned to in-plane ring deformation, were strongly enhanced by the surface, indicating a perpendicular orientation of the flavonoids on the Ag surface. The spectra of the flavonoids were compared, and a case study of application to detect weld, a mixture of apigenin and luteolin, in a textile is presented. (publisher abstract modified)
      
  
          Additional Details
Grant Number(s)
        2006-DN-BX-K034


  
  
        
  Agencies
        NIJ-Sponsored


  
  
        
  Award
        Development of Advanced Raman Spectroscopy Methods and Databases for the Evaluation of Trace Evidence and the Examination of Questioned Documents
    
  
  
Date Published: January 1, 2009
    
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