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Thanks Bo Song for your valuable suggestion. We are glad you liked the video. We will try to remove the background noise or atleast reduce it's volume level in our future videos :)
Man, I'm from Germany. And idk what the hell is going on with our teachers but I understood this topic better in not even 5 minutes than in 2 weeks of school lessons. And your video is in English !!!
Thank you +Savita Ct for the support and feedback. The background music in the future videos will be kept to a minimum so that it does not distract the viewers from the main concept :)
QUESTIONS : 1. Why triplet states has lower energy than singlet states? 2. What can cause intersystem crossing? 3. What can cause the spin change its direction from S1 to T1, from T1 to S1?
1. The answer might sound weird. But the truth is in Singlet state the repulsion between electrons is higher than in Triplet state. Yep it's confusing. Afterall how can +1/2 & -1/2 charges have more repulsion than two +1/2? Triplet state provides degenerate orbitals, meaning a larger area to accommodate the electrons. In this space similar species(two +1/2) can exchange energies due to the property of degeneracy. Where as in case of a Singlet state the two electrons are stuffed in a single orbital resulting in high repulsion. Now the most interesting part, all these signs + and - are used to denote the orientation of the spin, not the charge. The charge of the electron is always NEGATIVE. Hence very simply, two negatively charges substances(e-) stuffed in a single orbital is highly repulsive and have more energy that two e- in degenerate orbitals.
2. Intersystem crossing (ISC) is a radiationless process of switching orbitals. It is often undergone by heavy atoms. Due to the presence of degenerate orbitals(T1 state) having lower energy (as discussed earlier) the electrons move from S1 state to T1 state.
3. Bro S1 and T1 are not spin directions. They're energy levels(S1 state and T1 state). And the transition of electrons from S1 to T1 is due to the availability of degenerate orbitals (discussed ealier). The change in spin orientation is necessary. Only if their spins are parallel, i.e. two +1/2 or two -1/2, they can exchange energies, and only if that happens they can be accommodated in the degenerate orbitals.
The Jablonsky diagram doesn't depict orbital energies, but the energy states of the molecular electronic system as a whole. You cannot put electrons on this diagram like you would in a molecular orbital diagram. Basically, every energy level in a Jablonsky Diagram represent its own personal molecular orbital diagram which is omitted.
We had uploaded a video on the topic you asked. But due to some technical doubts we have pulled that video down. Once those doubts are cleared, we will publish the video again.
I appreciate the efforts of making this video with intention to simplify the concept. However, i noticed that you have forgotten to mention several things including the internal conversion, types of molecules that can fluoresce etc. Another thing is that you have wrongly mentioned the lifetime in the singlet excited state as varying from 10^-8 to 10^-4 seconds. These l lifetimes are I few nano seconds only.
The channel is majorly dedicated to engineering videos. The Frank-Condon principle is a part of quantum chemistry where we have no expertise. Still we will try to understand and if possible upload a video on it. Thanks again for the approach :)
Get amazing content and support on Academic Courses, GATE Courses, Professional Courses and Career with Ekeeda. Go to ekeeda.com/ platform and register with the referral code EAPHAR74. Use the coupon code Ninja10 on purchase for special discount!
We have an exciting news for everyone! We have developed a course on PLC basics in collaboration with Internshala where you can get good discounts using the coupon code ISRP16947850. Go check it out here- trainings.internshala.com/plc-programming-training
I really like the video but I would like to suggest that you remove the background music. It is distracting!
Thanks Bo Song for your valuable suggestion. We are glad you liked the video. We will try to remove the background noise or atleast reduce it's volume level in our future videos :)
No back ground music is good I like it it effective
Exactly,why the hell is background music there
@@PracticalNinjas Would you please reupload this video without the background music?
Due to certain technical issues we are unable to upload the video without background noise
You're explanation and PPT was awesome 😍
But, Please decrease background volume
I'm unable to concentrate on the concept
Good explanation.But music is make concantrate difficult.
+cheery berry. Thanks for the feedback. Will try to keep music volume low in the next videos 😃
Thank you for your consideration :)
Hope you enjoy other videos on our channel as well :)
Yes keep the music but little lower :)
Sure ACswe91 :)
Man, I'm from Germany. And idk what the hell is going on with our teachers but I understood this topic better in not even 5 minutes than in 2 weeks of school lessons. And your video is in English !!!
Very helpful video, thank you so much sir 🙏🙏🙏😊😊😊
Cool!Thank you so much!
How I couldn't find this video earlier. Really amazing and beautiful explaination. Finally I can score and understand at the same time 🙌🙌🙌thank youuu
I think you should add why fluorescence light is higher in wavelength, due to energy being lost to vibration
Higher in wavelength dear please correct
@@gameon4195 Lower in wavelength to the incident light is what I meant
@@gameon4195 Oh wait you're right
@@LadyShaydex thanks 😊
WOW, amazing job, this is exactly what I was looking for. I'm shocked more people are not interested in this topic.
This was great. I needed to remember these concepts in short time. Thanks
Nice and telugu explanation... Is better to understand
thankyou. very well explained. it would me better if no background music.
Thank you +Savita Ct for the support and feedback. The background music in the future videos will be kept to a minimum so that it does not distract the viewers from the main concept :)
Agree with you
@@PracticalNinjas why is it called triplet state instead of doublet which makes more sense since there are two?
@@PracticalNinjas Thanks for the video. I actually liked the background music..Could you tell me who the composer is?
Great video, really liked the visuals and it helped me understand it more!
very helpful for beginner
Beautifully explained... Thank u for making it quite easy to understand!
simple explaination and i understand the whole thing better!!! THANKYOU
Thanks Safwanah Rahman for such positive words.
Good explanation..keep it up
Thank you for explaining Jablonski diagram.
thank you so much for making this video you have explained this phenomenon in a very simple and comprehensive way
Thanks Chitra Keshwani for such a positive feedback. We are glad that you liked the video!!!
Best 👍 jazak Allah Khair
Very nice discription very good way to explained keep it up
The 1st second I was like "music😫", but then I was into the mood,thank you so much, I was having real trouble with singlet and triplet state 🌺
Awesome!! I can never forget the concept after watching this!!
Glad you liked the video Harshita Bhati :)
Such a good explanation. Music is a little too loud, but great video. Thank you so much!
The background music adds so much meaning to this presentation. Perhaps more volume could enhance our understanding.
Excellent work. Colorful and creative. Makes the video engaging.
Thanks +Amit Vele.
This explanation is really beneficial ...
Thankyou for the simplified explanation!
Thanks for clearing out concepts 😊
useful and easy to understand explain .
thanks
Asome sir u define it very easy to understood 👌👌
awesome music!and explanation
Thank you so much sir
Superb explaination
Amazing video sir! Thank you so much
Very helpful. Thanks
Good work. it was really helpful for me. this video cleared my basic concepts!!
this video is amazing, thank you vvery much
Very nicely explained 👍👍.... Thank u so much
Very helpful Thankyou so much
Awesome 🤗🤗🤗
thanks you for your efforts, Indeed.
QUESTIONS :
1. Why triplet states has lower energy than singlet states?
2. What can cause intersystem crossing?
3. What can cause the spin change its direction from S1 to T1, from T1 to S1?
1. The answer might sound weird. But the truth is in Singlet state the repulsion between electrons is higher than in Triplet state. Yep it's confusing. Afterall how can +1/2 & -1/2 charges have more repulsion than two +1/2?
Triplet state provides degenerate orbitals, meaning a larger area to accommodate the electrons. In this space similar species(two +1/2) can exchange energies due to the property of degeneracy. Where as in case of a Singlet state the two electrons are stuffed in a single orbital resulting in high repulsion. Now the most interesting part, all these signs + and - are used to denote the orientation of the spin, not the charge. The charge of the electron is always NEGATIVE. Hence very simply, two negatively charges substances(e-) stuffed in a single orbital is highly repulsive and have more energy that two e- in degenerate orbitals.
2. Intersystem crossing (ISC) is a radiationless process of switching orbitals. It is often undergone by heavy atoms. Due to the presence of degenerate orbitals(T1 state) having lower energy (as discussed earlier) the electrons move from S1 state to T1 state.
3. Bro S1 and T1 are not spin directions. They're energy levels(S1 state and T1 state). And the transition of electrons from S1 to T1 is due to the availability of degenerate orbitals (discussed ealier). The change in spin orientation is necessary. Only if their spins are parallel, i.e. two +1/2 or two -1/2, they can exchange energies, and only if that happens they can be accommodated in the degenerate orbitals.
well done! thanks!
really simplified explanation
supper...b i really like this video
Tremendous explanation... Helped me alot
It was so simple and easy to understand thank u
Good explanation
Thanku soooo much sir 🙏🏼🙏🏼🙏🏼🙏🏼🙏🏼
Perfect explanation. Everything I was looking for
Glad we could help you :)
Thank you so much❤️❤️
Nice video sir. Excellent explanation 👍
Beautifully explained!!!
Thanks Sukanya! Glad you liked it.
This was so good thank you. Agree with others about removing the music though.
Great content
You are amaziiiiiiiiing!!!
Nice video sir
Overall this is a great video. Thank you!
Thank you so much for a very clear and straightforward explanation!
We are glad you liked our video Khawllah Roussi
great video man
hallo
im big fan
The Jablonsky diagram doesn't depict orbital energies, but the energy states of the molecular electronic system as a whole.
You cannot put electrons on this diagram like you would in a molecular orbital diagram.
Basically, every energy level in a Jablonsky Diagram represent its own personal molecular orbital diagram which is omitted.
thank you so much Now I understand
we are glad the video could help you :)
love the video maker
Thank you this helped a lot i have to make a oled from Ru(bpy)32+ and this helped me learn some of the basics
Happy to hear that the video was helpful :)
understandable.Keep up the good work
Thanks +ketiyala tzudi. Glad you liked it
Helped me a lot. THANK YOU! Suggestion though, remove the effect on the texts. :)
Thanks a lot for your feedback :)
Gud job ...keep going👍🏼
Thanks +snehitha talla. Glad you liked our work.
Nice and superb
Thanks a lot.
Thank u
Helped a lot
Thanks a million !!!! Nice explanation . Keep it up guys 👍
Thanks Paritosh Sharma for the support :)
@@PracticalNinjas but bro my question is why that Intersystem crossing takes place
This helped me a lot! Please edit out the music.
Voice of narrator is really good
_Awesome_
Best video ...
Thanks preeti khobragade
thank u so much
Nice one thanks
:)
Thanks a lot sir
Glad you liked it
well done thanks.
Thanks +Furkan CAPRAZ. Glad you liked the video.
awesome
very well explaind
Thanks Faisal Wighral
nce vedio thanku
We are glad you liked our video.
The isc should happen horizontally, so to a same energy level
From there due to vibrational relaxation it comes to T1
Great explanation, I ave a quert why is excitation of radiation at 90 degree
loved itt.....
Perfect
music volume down or a more no music would be better, but excellent video and very easily understandable, awesome job.
Thanks +Yasmine Bingei for the feedback :) Will surely try to reduce the volume in the next videos. Glad you liked the video.
What is meant by stray Light ??? Plz tell me anyone
The unwanted light in a particular experiment is referred to as stray light.
Nice
superb..
Thanks +Shravan Kumar Muppidi. Glad you liked the video.
Good explanation plz avoid music
Is it molecular transition?
does this jumping on and off of energy states mean changing orbitals ? or something different ?
Plz tell about atomic absorption spectroscopy
We had uploaded a video on the topic you asked. But due to some technical doubts we have pulled that video down. Once those doubts are cleared, we will publish the video again.
Hi, Where do you make this videos, in which software
Thanks sir
I appreciate the efforts of making this video with intention to simplify the concept. However, i noticed that you have forgotten to mention several things including the internal conversion, types of molecules that can fluoresce etc. Another thing is that you have wrongly mentioned the lifetime in the singlet excited state as varying from 10^-8 to 10^-4 seconds. These l lifetimes are I few nano seconds only.
sir please tell why the emission wavelength is greater than the absorbance wavelength ?
Flourespectroscopy ka video chahiye sir
Can u plz upload video on franl condon principle ... Its urgent.. Thank u sir
The channel is majorly dedicated to engineering videos. The Frank-Condon principle is a part of quantum chemistry where we have no expertise. Still we will try to understand and if possible upload a video on it. Thanks again for the approach :)