The discussion centers on the resonant frequencies of volatile organic compounds (VOCs) such as Propene, Toluene, Benzene, and Ethylbenzene. Participants suggest utilizing infrared (IR) spectra to identify vibrational frequencies associated with chemical bonds in these compounds. Key points include the distinction between photon flux and photon energy, as well as the clarification that bond dissociation typically involves electronic excited states rather than vibrational states. The conversation also references a retracted article regarding bond dissociation by resonant infrared light, emphasizing the need for credible sources in scientific discussions.
PREREQUISITESChemists, researchers in organic chemistry, and students studying molecular spectroscopy will benefit from this discussion, particularly those interested in the vibrational properties of volatile organic compounds.
Thank you ,will remember that .HAYAO said:Well, quick google in google images with the keywords "*compound name* IR spectrum" gave my IR spectrum for all of the compounds you mentioned.
Sveral said:Thank you ,will remember that .
I'm sorry, I made a bad typo. It was supposed to be "gave me" not "gave my". Big difference that could've got you confused. Just so you know.HAYAO said:Well, quick google in google images with the keywords "*compound name* IR spectrum" gave my IR spectrum for all of the compounds you mentioned.
Didn`t really notice that one, just read it as "me" anyways:D Could anyone explain to me, wheather or not resonance can be created by continuously applying a photon flux , which when reaches the total energy of the bond will break it?HAYAO said:I'm sorry, I made a bad typo. It was supposed to be "gave me" not "gave my". Big difference that could've got you confused. Just so you know.
Sveral said:Could anyone explain to me, whether or not resonance can be created by continuously applying a photon flux , which when reaches the total energy of the bond will break it?
Ok, fair enough. I think, that the best option would be to simply quote the text I am talking about, but, please, do not ask for the entire document, that I simply can not do. the quote "HAYAO said:I have to clear up several things before I can answer your question. Some of what I say below, you might know, so you can just tell me whether you know or not.
1) Bond does not dissociate when a molecule absorbs energy corresponding to the bonding mode (resonance). You have just simply excited the molecule to a higher phonon level.
2) There is a difference between photon flux and photon energy. The former essentially refers to how many photons will be in a unit time and unit area (typically given in W/mm2). The latter refers to the energy a single photon itself has (units in wavelength, wavenumber, or eV...sometimes in frequency).
3) Continuous application of a photon beam only increases the number of molecule excited to a higher phonon level. Theoretically, it is possible to doubly excite a single molecule when using high intensity beams (like lasers), but the possibility of the phonon excited molecule deactivating is significantly higher than absorbing two photons.
With that said, can you rephrase your question? Or does this already answers it?
I am wondering. Are you talking about electronic excited state or vibration excited state? What we've talked about so far is the vibration excited state. But bond dissociation by absorption of a photon usually involves electronic excited state.
You are referring to the article in Science:Sveral said:Ok, fair enough. I think, that the best option would be to simply quote the text I am talking about, but, please, do not ask for the entire document, that I simply can not do. the quote "
The desorption yield peaked at a wavelength
of 4.8 mm (Fig. 1B), corresponding to
0.26 eV, the energy of the vibrational stretch
mode of the Si-H bond at the terrace sites of the
Si(111) surface.
"
True, but for now that is not yet possible, that, as far as I know, is the only work of it`s kind, that`s the problem...HAYAO said:You are referring to the article in Science:
http://science.sciencemag.org/content/312/5776/1024
This paper was retracted in 2011 because they were unable to reproduce the results. I'm not surprised because I have never heard of dissociation of bond by resonant infrared light. I am quite skeptical of this phenomenon. If it is possible, then it must be of an indirect process(es). I may be proven wrong in the future, but for now you'll have to provide me with a legitimate article.
I'm sorry, but now your question doesn't make sense. What is "the problem" you are talking about? What are you trying to ask?Sveral said:True, but for now that is not yet possible, that, as far as I know, is the only work of it`s kind, that`s the problem...