کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10564439 | 970753 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Raman and surface-enhanced Raman study of thiamine at different pH values
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Raman and surface-enhanced Raman study of thiamine at different pH values Raman and surface-enhanced Raman study of thiamine at different pH values](/preview/png/10564439.png)
چکیده انگلیسی
Raman spectroscopy was employed for evidencing the protonated and unprotonated thiamine molecular species in aqueous solutions at different acid and basic pH. The recorded Raman spectra were assigned on the basis of density functional theory (DFT) calculations. Also, at different pH values of the gold sol, the adsorption of the two molecular species to colloidal metal particles was monitored by means of surface-enhanced Raman scattering (SERS). At pH values of 3, 4 and 5, the SERS spectra revealed the coexistence of unprotonated and protonated thiamine molecules adsorbed on the gold surface. The adsorption was concluded taking place through the N3â² and N1â² atoms from the pyrimidine moiety of thiamine. The orientation to the gold surface of the protonated and unprotonated thiamine molecular species was discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vibrational Spectroscopy - Volume 39, Issue 2, 31 October 2005, Pages 169-176
Journal: Vibrational Spectroscopy - Volume 39, Issue 2, 31 October 2005, Pages 169-176
نویسندگان
Nicolae Leopold, Simona CîntÄ-Pînzaru, Monica Baia, Elisabeta Antonescu, Onuc Cozar, Wolfgang Kiefer, Jürgen Popp,