caa a22 4500 445328037 CHVBK 20180317142727.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s10953-011-9656-8 doi (NATIONALLICENCE)springer-10.1007/s10953-011-9656-8 Proton Medium Effect Based on the Ferrocinium Assumption in 80 Mass-% Propylene Carbonate + 20Mass-% p -Xylene Medium [Elektronische Daten] [Damaraju Parvatalu, Ashwini Srivastava] Conventional electrochemical studies on the ferrocinium-ferrocene (Fc+-Fc) redox system in 80 mass-% propylene carbonate (PC) + 20mass-% p-xylene (PX) medium are reported, leading to a calculation of the proton medium effect. The dissociation constant of ferrocinium picrate in this medium was determined by conductivity measurements. Thevalue of $E_{\mathrm{Fe^{+} /Fe}}^{\mathrm{o}}$ against the Hg/HgCl2(s) reference electrode in 80 mass-% PC + 20mass-% PX was determined potentiometrically in conjunction with conductivity data, and found to be 0.133±0.001V versus the SHE at 25 °C. The $E_{\mathrm{Fe^{+} /Fe}}^{\mathrm{o}}$ value has also been calculated using cyclic voltammetric data obtained in 80 mass-% PC + 20mass-% PX at a micro platinum working electrode against the Ag/AgCl (nonaq.) reference electrode, and found to be comparable with the value obtained by potentiometry. The proton medium effect for transfer from water to the present mixed solvent medium was calculated using the value of $E_{\mathrm{Fe^{+}/Fe}}^{\mathrm{o}}$ versus SHE at 25 °C and found to be 4.5. Based on values of proton medium effect reported in the literature, it is inferred that the present mixed solvent medium is slightly more basic than purePC. Springer Science+Business Media, LLC, 2011 Propylene carbonate nationallicence p -xylene nationallicence Ferrocinium picrate nationallicence Ferrocene nationallicence Potentiometry nationallicence Voltammetry nationallicence Parvatalu Damaraju Department of Chemistry, University of Mumbai, Vidyanagari, Santacruz (E), 400 098, Mumbai, Maharashtra, India aut Srivastava Ashwini Department of Chemistry, University of Mumbai, Vidyanagari, Santacruz (E), 400 098, Mumbai, Maharashtra, India aut Journal of Solution Chemistry Springer US; http://www.springer-ny.com 40/3(2011-03-01), 403-414 0095-9782 40:3<403 2011 40 10953 https://doi.org/10.1007/s10953-011-9656-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10953-011-9656-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Parvatalu Damaraju Department of Chemistry, University of Mumbai, Vidyanagari, Santacruz (E), 400 098, Mumbai, Maharashtra, India aut NATIONALLICENCE 700 1- Srivastava Ashwini Department of Chemistry, University of Mumbai, Vidyanagari, Santacruz (E), 400 098, Mumbai, Maharashtra, India aut NATIONALLICENCE 773 0- Journal of Solution Chemistry Springer US; http://www.springer-ny.com 40/3(2011-03-01), 403-414 0095-9782 40:3<403 2011 40 10953 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer