Jablonski diagram/Photophysical processes/Fluorescence/Phosphorescence/Radiative and non-radiative

Jablonski diagram video describes the various photophysical processes
Radiative processes- Fluorescence process, phosphorescence process
Non-radiative processes - vibrational relaxation, internal conversion , inter-system crossing
You will be able to
draw Jablonski diagram
discuss the various transitions using Jablonski diagram
classify the radiative and non-radiative transitions
explain vibrational relaxation, internal conversion and inter-system crossing
elaborate the process of fluorescence and phosphorescence
Jablonski diagram is a pictorial representation of the energy diagram illustrating the various electronic and vibrational levels and different transitions occurring within them.
Radiation-less transition/Non-radiative transitions
(Only heat loss without emission of light)
Internal conversion
Transition from a higher vibrational level to lower vibrational level of same state. (e.g. from a vibrational level of S2 to a vibrational level of S1 with same energy).
This occurs in the range of 10-14 to 10-11 s
Inter-system crossing
Transition from a vibrational level of one state to a vibrational level of another state of same energy (e.g. a vibrational level of S1 to a vibrational level of T1 with same energy).
This occurs in the range of 10-11 to 10-6 s
Radiative transition/Radiation transition (emits light during transition)
Fluorescence
Transition from lowest vibrational level of S1 to any vibrational level of S0 by emitting light. Fluorescence stops right after the source of radiation is switched off. This occurs in the range of 10-9 to 10-6 s.
Fluorescent inks, paints, blue fluorescent dye in detergents, reflector plates in vehicles.
Radiative transition/Radiation transition (emits light during transition)
Phosphorescence
Transition from lowest vibrational level of T1 to any vibrational level of S0 by emitting light. Phosphorescence continues even after source is removed.
This occurs in the range of 10-6 to 10 s
Phosphorescent inks and paint in fire-extinguishers, clock dials etc., phosphorescent pigment “resin mold” used in glow-in-the-dark toys, stickers etc.

[@ramneetkaurlotey1899]

Very nice explaination!!! Thanks for these wonderful videos

[@RevathiPurushothaman]

It's my pleasure. Thanks

[@haripadaraut3541]

I understand well and relate with real example after see this videos . thanku

[@RevathiPurushothaman]

It's my pleasure. Thank you very much.

[@Amankhan-wt1nz]

Thank you so simple very nice explanation

[@RevathiPurushothaman]

It's my pleasure. Thanks.

[@kevinbalfe6139]

Great explanation, thanks!

[@RevathiPurushothaman]

My pleasure.

[@MyChemistry109]

Very helpful 👌 video

[@RevathiPurushothaman]

Thank you. It's my pleasure.

[@ramanupadhyay2007]

Ma'am in one of your video on corrosion you told that the to prevent corrosion the anode should be Larger than cathode in area. But madam what is the reason behind that anode is larger than cathode???

[@RevathiPurushothaman]

If the anode is smaller than cathode, it will undergo drastic corrosion and even lead to pitting corrosion.

[@ramanupadhyay2007]

@@RevathiPurushothaman how larger anode and smaller cathode prevents form corrosion???

[@honluk9952]

nice explanation, but did not understand anything.

[@RevathiPurushothaman]

Watch it again.

[@pcoc3879]

Thank you

[@RevathiPurushothaman]

Most welcome.

[@sksimplelecturesinfo.4639]

Very nice explanation, thanks mam

[@RevathiPurushothaman]

Thank you very much.

[@sarojchoudhary3480]

Very nice Explanation Mam.... Can you please make some videos on thermal analysis TGA,DTA, DSC... Its a request...

[@RevathiPurushothaman]

Sure. I too have that idea.

[@Sahil.S.B.]

Thank you mam

[@RevathiPurushothaman]

Most welcome.

[@rahulbagla1638]

Very nice

[@RevathiPurushothaman]

Thank you.

[@amanadleshorts7429]

Nice explanation

[@RevathiPurushothaman]

Thank you.

[@drbhaskararaotadiboina9711]

nice explanation madam

[@RevathiPurushothaman]

Thank you so much.

[@Tnpscremembertricks]

Nice explanation what is the reference books for this topic pls tell me🙏🙏🙏🙏

[@RevathiPurushothaman]

Thank you very much.

[@Tnpscremembertricks]

@@RevathiPurushothaman mam. Pls tell me reference book mam🙏🙏

[@rahulbagla1638]

Do you make pharmacy related videos ma'am?

[@RevathiPurushothaman]

Analytical techniques may be covered. Thank you.