Comparative Studies on the Interfacial Behaviour of Adenylyl-(3′—5′)-Guanosine by Phase Sensitive AC Voltamhetry, Pulse Voltammetry and Single Sweep Voltahhetry at Charged Interfaces

M. M. Kamal Chemistry Department, Faculty of Science, Assiut University, Assiut, Egypt

Z. A. Ahmed Chemistry Department, Faculty of Science, Assiut University, Assiut, Egypt

M. E. Ahmed Chemistry Department, Faculty of Science, Assiut University, Assiut, Egypt

M. S. Ibrahim Chemistry Department, Faculty of Science, Assiut University, Assiut, Egypt

Y. M. Temerk Chemistry Department, Faculty of Science, Assiut University, Assiut, Egypt

Abstract

Adeny ly 1-.(3′—5′)-guanosine has been investigated in order to expand the potentialities of pulse voltammetry and phase sensitive ac voltammetry in connection with the HMDE for study of the adsorption and interfacial behaviour of the investigated compound. The results are compared with rapid single sweep voltammetry being sensitive to the faradaic reduction response of the adsorbed substance. From the limiting value of the excess surface concentration an average surface area per adsorbed mononucleotide unit of abput 0.4 nm² was found which is comparable to the value resulting under tne same conditions for poly.A.

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Comparative Studies on the Interfacial Behaviour of Adenylyl-(3′—5′)-Guanosine by Phase Sensitive AC Voltamhetry, Pulse Voltammetry and Single Sweep Voltahhetry at Charged Interfaces

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Comparative Studies on the Interfacial Behaviour of Adenylyl-(3′—5′)-Guanosine by Phase Sensitive AC Voltamhetry, Pulse Voltammetry and Single Sweep Voltahhetry at Charged Interfaces

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