I would like do experiments in order to confirm the electron transfer/ energy transfer phenomenon between the two neutral molecules in solution state. So which experiment is preferred to differentiate the above 2 process in solution state??
The ET emission should look different from those of the respective molecules.
It's also possible that both processes take place, as in following case:
http://pubs.acs.org/doi/abs/10.1021/jp063038s
So it would be safer to figure out the HOMO/LUMO energies of both molecules before interpretting time-resolved data (TCSPC, fluorescence upconversion etc.).
Mr. Pandith ,
CT - by one-photon absorption, while energy-transfer - by two-photon absorption measurements.
Thank you very much Dr. Lin and Dr. Ivanova for your valuable suggestions.
I would carry out ohotphysical studies in solvents of differnet polarity. If ET takes paces this would be enhanced in polar media.
One of the oldest systems exhibiting an electron - transfer band is iodine/benzene observed in the visible region of the spectrum. This example is often cited. If you need a demonstration for students, dealing with spectroscopic and energetic aspects of charge transfer, you may consider this paper in J. Chem. Educ.
http://pubs.acs.org/doi/pdfplus/10.1021/ed086p1330
As mentioned by Juan, the optical absorption may be quite sensitive to solvent polarity. Solvent polarity scales have been devised from these shifts, like ET(30) by Reichardt et al. (internal CT in a betaine), and the Z constant by Kosower (CT occurs between positive and negative ions). Please ask if you nee more infos.
Thank you Prof.Dr. Jean-François Gal for your valuable suggestions. I got really good information which is very closely related to my work. Thanking you sir
Time-Resolved Laser spectroscopic experiment at nanosecond/picosecond level can easily distinguish the two phenomena. If electron transfer occurs one will be able to observe radical ions or radical ion pair, and if energy transfer takes place one can observe the excited state of the donor/acceptor.
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