کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
180551 459382 2009 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Admittance as a useful tool for investigation of solute–solvent interactions at the double layer
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Admittance as a useful tool for investigation of solute–solvent interactions at the double layer
چکیده انگلیسی

The application of admittance measurements, an often neglected topic in impedance spectroscopy, to further our understanding of solute–solvent interactions at the double layer is presented by comparing aqueous solutions of sodium acetate and protonated lidocaine acetate. Unlike impedance, the overlap of concentration-dependent hydration cospheres and the potential- and frequency-dependent orientation effects of water molecules around the ions at or near the double layer could be manifested in admittance data. Admittance, but not impedance, also allows identification of interactions between two dipoles, such as amino and carbonyl groups, by changing frequencies and applied potentials. The effects manifest themselves by exhibiting cathodic and anodic shifts with frequency changes. All the admittance data could be reasonably explained by utilizing the concept of “potential induced and water structure-enforced ion-pair formation”.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochemistry Communications - Volume 11, Issue 11, November 2009, Pages 2229–2232
نویسندگان
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