Open AccessNEAR INFRARED SURFACE ENHANCED RAMAN-SCATTERING OF HALATE IONS
Author(s) -
Xiaolan Ye,
Deng Wen-Jie,
Erjun Liang,
W. Kiefer
Publication year - 1997
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.46.2130
Subject(s) - raman scattering , ion , raman spectroscopy , materials science , infrared , lone pair , analytical chemistry (journal) , photochemistry , inorganic chemistry , molecule , chemistry , optics , physics , organic chemistry , chromatography
Surface enhanced Raman scattering (SERS) of halate ions in silver colloids is studied by near infrared (NIR) laser excitation.Ions of ClO3 and BrO3 in silver colloids give rise to SERS bands at about 226 and 158cm1,respectively while IO3 ions on colloidal silver surface result in two Raman bands at about 750 and 334cm1.These results indicate that the interactions of ClO3 and BrO3 ions with silver surface are through their lone pair electrons of Cl and Br.Nevertherless,IO3 ions bond to silver surface through their negatively charged O.The interaction strength of halate ions with silver are measured to be BrO3>ClO3≈IO3.The enhancements of the Raman modes of pyridine caused by addition of halate ions increase in the order ClO333.The enhancement mechanisms in NIR SERS are discussed.