Hi Michael, any chance you could clear up this confusion for me? cramming photochem rn Relating to stokes shift, the question is what are the reasons that the GS v=0- ES v= 0 transition of the same molecules absorbance and emission spectra do not overlap. I understand the first excited state generally decays to a higher vibrational level of the GS initially, then decays to the ground vibrational level, but is this still considered a v=0 to v=o transition? Cant really reason why a direct 0-0 transition would have a stokes shift and not overlap. Again online sources say it is because the electron initially relaxes to a higher vibrational level of the ground state, but I dont think thats considered a 0-0 transition? Is it related to non-overlap of vib wave functions / internuclear distances visible on a FC diagram? does this lower the energy of emission ? or is it solvent reorg? Thanks!
Really helped with clearing up some questions I had for my university course on this topic, thanks!
What an excellent explanation and connection of these three highly important principles in luminescence spectroscopy! Compact and on point!
Thanks Toni!
Hi Michael, any chance you could clear up this confusion for me? cramming photochem rn
Relating to stokes shift, the question is what are the reasons that the GS v=0- ES v= 0 transition of the same molecules absorbance and emission spectra do not overlap.
I understand the first excited state generally decays to a higher vibrational level of the GS initially, then decays to the ground vibrational level, but is this still considered a v=0 to v=o transition? Cant really reason why a direct 0-0 transition would have a stokes shift and not overlap. Again online sources say it is because the electron initially relaxes to a higher vibrational level of the ground state, but I dont think thats considered a 0-0 transition?
Is it related to non-overlap of vib wave functions / internuclear distances visible on a FC diagram? does this lower the energy of emission ? or is it solvent reorg?
Thanks!
Muy buen video!
nice videos. a small opinion, 14.01: the filled circles are deuterated.
So H-derived are faster, right? H is lighter and vibrates more violently.