Srijon Ghosh

\\Ultrafast Spectroscopist//\\JSPS Post-doc at Kyoto University//\\Alumnus IACS, Presidency University // \\TravelisLife//

[Srijon Ghosh @Ghoshsrijon]

My latest research, published in @J_A_C_S, reveals the twisted ground-state intermediate, formed during electronic relaxation of nucleobase derivatives (first discovered experimentally by us earlier) is the key species mediating photohydration damage.

https://t.co/dmdB4fnlav

[Srijon Ghosh @Ghoshsrijon]

(4) My two other papers in this series and in @J_A_C_S as well, can be found below
1. https://t.co/YCgc6LMOwG
2. https://t.co/MMFx1tdf8m

[Srijon Ghosh @Ghoshsrijon]

My latest research, published in @J_A_C_S, reveals the twisted ground-state intermediate, formed during electronic relaxation of nucleobase derivatives (first discovered experimentally by us earlier) is the key species mediating photohydration damage.

https://t.co/dmdB4fnlav

[Srijon Ghosh @Ghoshsrijon]

(3)
This is the third paper in the series, building a detailed mechanistic understanding of nucleobase photochemistry. The paper is open access, so you can read it without worrying about subscription barriers.

[Srijon Ghosh @Ghoshsrijon]

(2)
2. Explain the role of C5 methylation, which reduces both TI formation and reactivity by affecting vibrational energy randomization and nuclear momentum at the conical intersection

[Srijon Ghosh @Ghoshsrijon]

(1)
Using a combination of ultrafast infrared spectroscopy and quantum mechanics/molecular mechanics simulations, we were able to:

1. Directly link TI formation yield and lifetime to photohydration rates, providing unambiguous evidence that the TI mediates the reaction.

[Srijon Ghosh @Ghoshsrijon]

Happy to share our recent accounts in Accounts of Chemical Research, summarizing my PhD works. Thanks @prof_amitava for this opportunity and your kind guidance.

@AmerChemSociety @patra_group @iacskolkata

https://t.co/dOF435Lhma

[Srijon Ghosh @Ghoshsrijon]

Our work in @J_A_C_S tackles a long-standing puzzle in nucleic acid photophysics: long-lived excited states in pyrimidine nucleobases. We show the intermediate is a metastable ground-state species with a twisted C=C bond, not an excited state!
https://t.co/YCgc6LMgH8

[J. Am. Chem. Soc. @J_A_C_S]

Formation of Ground-State Intermediate during Electronic Relaxation of Pyrimidine Nucleobases | Journal of the American Chemical Society @KyotoU_News https://t.co/1VFbajrtwy

[Srijon Ghosh @Ghoshsrijon]

@Ayan_Nation1st Congratulations @Ayan_Nation1st Sir.

[Srijon Ghosh @Ghoshsrijon]

@prof_amitava @patra_group @JPhysChem (7/7) Special Note: Although the work was already done a few years back, I could enrich the work with some DFT calculations that I learned during my Postdoc, which, although very simple, gives me the satisfaction of learning and implementing new things.

[Srijon Ghosh @Ghoshsrijon]

Interested in BODIPY dyes and their aqueous aggregates? Check our recent work. Sincere thanks to @prof_amitava @patra_group for his valuable guidance and @JPhysChem for giving us the opportunity to publish this work. Check comment(s) for details.

https://t.co/Pg5uXTeGJf

[Srijon Ghosh @Ghoshsrijon]

@prof_amitava @patra_group @JPhysChem (6/7) My sincere thanks to Prof. Patra for his valuable guidance and for giving me the opportunity to publish this work. Thanks to Dr. Mula from BARC, India and Dr. Biswas from Weizmann Institute, Israel for this awesome collaboration.

[Srijon Ghosh @Ghoshsrijon]

@prof_amitava @patra_group @JPhysChem (5/7) Thorough ultrafast spectroscopic investigation suggests prominent features of these aqueous aggregates that will be helpful in biophotonics and photocatalytic applications in the future.

[Srijon Ghosh @Ghoshsrijon]

@prof_amitava @patra_group @JPhysChem (4/7) Also, we reported highly Stokes-shifted emission from aqueous BODIPY H-aggregates (which are usually non-emissive) due to their special herringbone close-packing structure.

[Srijon Ghosh @Ghoshsrijon]

@prof_amitava @patra_group @JPhysChem (3/7) This work is significant as we identified unusual "red-shifted H-aggregates" for the first time for BODIPYs.

[Srijon Ghosh @Ghoshsrijon]

@prof_amitava @patra_group @JPhysChem (2/7) We have shown how the close-packing structure controls the aggregation behavior and eventually the excited state dynamics of these BODIPY aggregates.

[Srijon Ghosh @Ghoshsrijon]

@prof_amitava @patra_group @JPhysChem (1/7) In this work we synthesized a series of BODIPY dyes, reported their crystal structures, and elucidated the detailed ultrafast excited state dynamics of these molecules and their aqueous aggregates.

[Srijon Ghosh @Ghoshsrijon]

@IndiaPostOffice my article number EW447541217IN is dispatched from KOL AP TMO on 5/1 and not delivered yet. Is it a joke? It contains important documents. Why are you calling your service 'speed post' when you are unable to deliver in time? Please update the status immediately.

[Srijon Ghosh @Ghoshsrijon]

@IndiaPostOffice worst service provided by you. My urgent article EW447541217IN is stuck at KOL AP TMO for 5 days. It says item dispatched but not received at all. Very poor service by the organisation . Please deliver it immediately and update me the status.

[Srijon Ghosh @Ghoshsrijon]

@Indranarayan01 Thank you

[Srijon Ghosh @Ghoshsrijon]

Our latest work is now out in the Journal of Physical Chemistry C, which elucidates the energy and charge transfer dynamics in an oligothiophene-squaraine hybrid aggregate to generate a charge-separated state that lives over 8 ns.
@patra_group @JPhysChem

https://t.co/meRj5hepCK