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A question came up during a discussion I had yesterday with some other chemists. None of us being physicists, the question went unanswered...Imagine a molecule with 6 redox-active fragments arranged in a circle, somewhat like this: AF BE C DThe six fragments are not conjugated to each other, so there is no orbital delocalized around the whole cycle (no conduction band), but they are close enough that electrons can hop (tunnel) from one fragment to either nearest neighbor with a fairly short half life (let's say an average of 25 ns between hops).If an electron tunnels from A to B, then B to C, and so forth around the whole molecule, is there any magnetic field generated?I know that with a classical description any moving charge generated a magnetic field, but if the electron can be viewed as effectively stationary between hops (tunneling events) how do we ascribe the induced magnetic field? (I am assuming that there will be a magnetic field produced, but if there isn't I would like to know why)Thanks!
Why would the electron ''hop'' from A-B? Why not A-F or A-E and why not simultaneous ''hopping'' from all point sources in random directions?
Sounds vaguely like a quantum ratchet:http://journals.aps.org/pre/pdf/10.1103/PhysRevE.87.022129They are certainly fun objects to toy around with.
Quote from: agyejy on 08/04/2016 19:59:18Sounds vaguely like a quantum ratchet:http://journals.aps.org/pre/pdf/10.1103/PhysRevE.87.022129They are certainly fun objects to toy around with.Thanks again. That's a very interesting read. I think there is a lot of overlap there with what I was thinking about. I wasn't necessarily planning on trying to capture thermal energy--my initial idea was to pump the molecule with a laser, but unfortunately, this wouldn't be any more than an academic curiosity because the strength of the magnetic field (even at the center of the molecule) would be insignificant compared to the amount of energy input by the light. The sample would probably heat up and decompose before any significant magnetic effects would manifest (at least using the first system I had in mind).