کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9757082 1495293 2005 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
UVRR spectroscopic studies of valinomycin complex formation in different solvents
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
UVRR spectroscopic studies of valinomycin complex formation in different solvents
چکیده انگلیسی
We investigated the complexation of valinomycin (VM) in different solvent environments with the aid of the UVRR spectroscopy. By probing the 206.5 and 229 nm excited Raman spectra, we showed that new bands are observed around 1700 and 1290 cm−1. We assigned the 1700 cm−1 band to the hydrogen bonded ester carbonyl stretching vibration. In a polar solvent, VM-K+ complexation shows significant intensity changes in amide and ester carbonyl stretching region. Because of the small amount of conformational interconversion, complexation has a negligible effect on other band intensities including, the amide III, CαH, and amide II. We also showed the effects of the solvent polarity on the solution conformation of VM.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 61, Issues 1–2, 1 January 2005, Pages 19-26
نویسندگان
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