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# OBSERVATION AND ANALYSIS OF THE SERS SPECTRA OF TETRAPHEYLPORPHINE(TPP) AND $IRON(\Pi)$ PROTOPORPHYRIN $(Fe(\Pi)PP)$

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/18418

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 Title: OBSERVATION AND ANALYSIS OF THE SERS SPECTRA OF TETRAPHEYLPORPHINE(TPP) AND $IRON(\Pi)$ PROTOPORPHYRIN $(Fe(\Pi)PP)$ Creators: Hu, Jun; Sheng, Rongsheng; Xu, Zhisan; Zeng, Yun E. Issue Date: 1993 Abstract: The SERS spectra of tetrapheylporphine(TPP) and iron ($\Pi$) protoporphyrin IX $(Fe(\Pi)PP)$ were obtained. Comparing of these two spectra, the bands 994, 1126, 1174, $1218cm^{-1}$ in spectra of TPP assigned to $v(C_{*} - C_{m}), v(C_{*} - N)$ were disappeared or the bands intensity decreased in SERS spectra of $Fe(\Pi)PP$. The band $1480cm^{-1}$ assigned to $v(C_{*}=-C_{*})$ in spectra of TPP was also disappeared in spectra of $Fe(\Pi)PP$. In the region of $1500-1700cm^{-1}$, there were three bands 1544, 1584, $1514cm^{-1}$ for TPP and two bands 1578, $1632cm^{-1}$ for $Fe(\Pi)PP$. Moreover, the band $1578cm^{-1}$ was enhanced intensity comparing with $1632cm^{-1}$ in SERS spectra of $Fe(\Pi)PP$. All these information indicated that, the porphyrin ring of TPP adsorbed on the surface of silver colloid by the four N atoms. But, for the $Fe(\Pi)PP$, since the four N atoms have complexed with $Fe(\Pi)PP$, the vibration modes of $v(C_{*}-C_{m}), v(C_{*}-N)$ were disappared. URI: http://hdl.handle.net/1811/18418 Other Identifiers: 1993-FC-12