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    STUDIA PHYSICA - Issue no. 1 / 2005  
         
  Article:   VIBRATIONAL SPECTROSCOPY, SURFACE-ENHANCED RAMAN SPECTROSCOPY AND THEORETICAL STUDIES OF SODIUM SALT OF 3-AMINO-3-[(5-BENZOTHIAZOLE-2YL)-FURAN-2YL]-PROPANOIC ACID.

Authors:  T. ILIESCU, D. MANIU, VASILE CHIŞ, M. TOŞA, FLORIN-DAN IRIMIE.
 
       
         
  Abstract:  Raman and surfaceenhanced Raman spectroscopy (SERS) have been applied to the vibrational characterization of sodiu salt of 3-amino-3-[(5-benzothiazole-2yl)-furan-2yl]-propanoic acid (salt 1). Theoretical calculation (DFT) have been performed to find the optimized structure and computed vibrational wavenumbers of this salt. SER spectrum in silver colloid at pH value of 8 have been also recorded and analysed. Good SER spectrum have been obtaining, providing the chemisorption of salt 1 molecule on the silver surface. At the investigated pH value the carboxylate anion has been bonded to the silver surface through  electron system having the tilted close to flat orientation with respect to silver surface. Phenyl, thiazole and furan rings have also close to flat orientation to the metallic surface.  
         
     
         
         
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