Can electrons be in shell levels in chemicals that absorb only ultraviolet?

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Offline Nicholas Lee

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Can the electron be in a shell level in ANY atom, or molecule that absorbs ultraviolet light only. Not visible light.?
If it were possible to keep electrons in higher shells like in shell 1, 2, or 3, permanenty.
So they would never go back to the ground state.
Say you wanted to make the electrons transmission light, by making the electrons stay in a certain shell region.
Are there shell levels that you could place the electron in, that would allow you to do this.
Ultraviolet (UV) light is electromagnetic radiation with a wavelength that in the range 10 nm to 400 nm, corresponding to photon energies from 3 eV to 124 eV.
So you just place the electron In a shell level that transmissions light but absorbs ultraviolet.
So the electron just absorbs 10nm to 400nm wavelengths of Ultraviolet waves, not visible lightwaves.
I am grateful for your help, anything helps even a few words. [:D]
« Last Edit: 30/06/2016 18:38:30 by chris »


Offline chiralSPO

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As far as I know it is not possible to keep electrons in energy levels that are higher than nearby empty levels for any significant amount of time. Some phosphorescent materials can hold an excited state for a second or two, but most electronic structures will relax within femtosceonds or picoseconds, maybe lasting as long as nanoseconds, but even a few nanoseconds would generally be considered a long time for such a state to exist.

These excited states also involve only one or maybe two electrons out of dozens or hundreds of electrons. If you tried to move too many of the electrons in a molecular system, the molecule would just fall apart (probably irreversibly).


Offline chris

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Timemachine2 - POLITE REQUEST - Can you please ensure that your topic titles are:

1) formatted as questions

2) Sufficiently succinct to fit completely within the title box.

This will result in better visibility of your thread and more engagement with other forum members.

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