Electrochemistry in organic (nonpolar) solvents

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Discussion Overview

The discussion centers on the feasibility and considerations of conducting electrochemistry in organic, nonpolar solvents. Participants explore the requirements for electrochemical processes, the nature of ions used, and the implications of solvent choice on electrochemical behavior.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant expresses uncertainty about the fundamentals of electrochemistry, outlining a basic setup involving a liquid solution, reference electrode, and sacrificial electrode.
  • Another participant asserts that a conductive solution is essential for electrochemistry and suggests that nonpolar solvents may not be suitable.
  • A different participant questions the possibility of performing electrochemistry in nonpolar solvents, particularly if the system of interest is insoluble in polar solvents, raising concerns about the formation of hydrophobic/hydrophilic interfaces.
  • It is noted that conductance is necessary for current flow and potential measurement, with a participant mentioning that all solvents may have some level of conductance, but highlighting that water has particularly high conductance due to hydrogen bonding.
  • A suggestion is made to review specific research papers that may provide insights into voltammetric behavior in the absence of supporting electrolytes.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the feasibility of electrochemistry in nonpolar solvents, with differing opinions on the suitability and implications of solvent choice for electrochemical processes.

Contextual Notes

Participants express uncertainty regarding the conductance of nonpolar solvents and the implications for electrochemical measurements. There are unresolved questions about the effects of solvent polarity on the electrochemical environment.

Hyo X
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Im not that familiar with electrochemistry.
You have some liquid solution with some concentration of ions, a reference electrode and a sacrifical electrode. You apply a potential with some feedback to control the potential environment of the liquid in the cell.
Roughly?

Can you do this with organic, nonpolar solvents? Does this change the kind of ions you use?
Are there other considerations? Thanks.
 
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The FIRST requirement when doing electrochemistry of any kind is a conductive solution. Nonpolar solutions wouldn't be my first choice.
 
chemisttree said:
The FIRST requirement when doing electrochemistry of any kind is a conductive solution. Nonpolar solutions wouldn't be my first choice.

I guess the question is whether it is Possible.
Assume the system i want to do electrochemistry on is insoluble in polar solvent. If my electrochemical solution is polar then there is some hydrohpobic/hydrophilic interface that develops around my system, negating the effects of electrochemistry?

CAN it be done with nonpolar solvents?
 
There will need to be conductance, otherwise no current would flow and then you would not measure a potential difference (for potential-determining) or be able to undergo electrolysis. I think all solvents will have at least some conductance; it's just that water has particularly high conductance thanks to the hydrogen bonds which allow H+ and OH- to conduct very quickly (as they don't really have to flow, more just induce the next ion to take on the positive charge instead, carrying current that way).
 
Check papers by Ciszkowska & Stojek - like Z. Stojek, M. Ciszkowska, J. Osteryoung, Anal.Chem., 66(1994)1507-12. Self-enhancement of voltammetric waves of weak acids in the absence of supporting electrolyte. I believe they did more research later, not necessarily together.
 
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