P. Thilagar's Research Group

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P. Thilagar's Research Group This group is headed by Prof. Pakkirisamy Thilagar from Department of Inorganic & Physical Chemistry, Indian Institute of Science Bangalore, India

🚀 Exciting news from our lab!Our latest work, “Polymer matrix drives thermal stimulation-caused dynamic phosphorescence ...
02/03/2026

🚀 Exciting news from our lab!

Our latest work, “Polymer matrix drives thermal stimulation-caused dynamic phosphorescence in dispersed chromophores,” has just been published in Nature Communications 🎉

We show how matrix–chromophore interactions govern thermally activated dynamic RTP behaviour, a key insight for functional phosphorescent materials.

Congratulations to authors...Subhajit Ghosh, Rajendra Prasad Nandi, Shamil R, Yapamanu Adithya Lakshmanna, Silvano Geremia, Neal Hickey, Abhishek Sirohiwal & Pakkirisamy Thilagar

Link: https://www.nature.com/articles/s41467-026-69664-x

Polymer matrices are widely explored for room-temperature phosphorescent materials, but their effects on photophysical properties remain insufficiently explored. Here, the authors report a study considering the electronic and steric impacts of the matrix on thermally stimulated phosphorescence.

Happy to share that our work has been accepted in the Journal of Materials Chemistry C and selected as part of the HOT P...
02/03/2026

Happy to share that our work has been accepted in the Journal of Materials Chemistry C and selected as part of the HOT Papers themed collection by the Royal Society of Chemistry.

This work explores how nodal versus non-nodal chiral tagging impacts the chiroptical properties of naphthalimides, highlighting how subtle electronic positioning can modulate CPL responses.

Congratulations to authors.. Jusaina Eyyathiyil, Maho Kitahara, Daiya Suzuki, Silvano Geremia, Neal Hickey, Yosh*tane Imai and Pakkirisamy Thilagar

We present a systematic investigation into the positional effects of point chirality on the chiroptical behaviour of naphthalimide-based chromophores. Specifically, we compare the effect of chiral tags at electronically distinct positions: the nodal N-imide site (electronically decoupled) and the no...

Excited and grateful to see our recent innovation on metal-free chiral aminoborane phosphors with room-temperature after...
30/07/2025

Excited and grateful to see our recent innovation on metal-free chiral aminoborane phosphors with room-temperature afterglow and CPL featured by several media outlets...!
(Media coverage links below)
https://timesofindia.indiatimes.com/city/bengaluru/iisc-researchers-develop-new-glow-in-the-dark-molecule-for-imaging-and-security-uses/articleshow/121314432.cms
https://www.thehindu.com/news/cities/bangalore/iisc-researchers-design-new-glow-in-the-dark-molecule-for-imaging-and-security-applications/article69601175.ece
https://www.deccanherald.com/india/karnataka/bengaluru/iisc-develops-new-organic-material-to-transform-security-labels-displays-3558413
https://phys.org/news/2025-05-dark-molecule-imaging-applications.html
https://www.etvbharat.com/en/!technology/hidden-messages-3d-displays-anti-counterfeiting-labels-iisc-cracks-code-for-smarter-luminescence-enn25060900900

Congratulations to authors... Jusaina Eyyathiyil, Subhajit Ghosh, Arunima Cheran, Silvano Geremia, Jatish Kumar, Neal Hickey & Pakkirisamy Thilagar

Researchers at IISc developed a metal-free organic phosphor with room-temperature phosphorescence and circularly polarised luminescence, enabling applications in security tags, OLEDs, and bio-imaging.

New Publication Alert! Axially chiral aminoboranes show enhanced persistent RTP and chiroptical properties. Their long a...
29/04/2025

New Publication Alert!
Axially chiral aminoboranes show enhanced persistent RTP and chiroptical properties. Their long afterglow enables hidden writing! A step forward for metal-free phosphors.
https://www.nature.com/articles/s42004-025-01529-8

Congratulations to authors...Jusaina Eyyathiyil, Subhajit Ghosh, Arunima Cheran, Silvano Geremia, Jatish Kumar, Neal Hickey & Pakkirisamy Thilagar

Long-lived triplet exciton harvesting materials are highly desirable for various applications, yet achieving persistent room-temperature phosphorescence (pRTP) in metal-free systems remains challenging. Here, introducing axial chirality into aminoboranes affords steric-hindrance-caused rigidity, res...

🎉 Three papers in a row — congratulations to Muhammed Muthasir on the recent publications! 👏https://pubs.acs.org/doi/10....
29/04/2025

🎉 Three papers in a row — congratulations to Muhammed Muthasir on the recent publications! 👏
https://pubs.acs.org/doi/10.1021/acs.inorgchem.4c04036
https://pubs.rsc.org/en/content/articlelanding/2025/dt/d4dt03200d
https://aces.onlinelibrary.wiley.com/doi/10.1002/asia.202401386

Fluorescence imaging is a powerful technique for visualizing cellular and molecular processes, but its effectiveness is often limited by aggregation-caused quenching (ACQ) and the limited specificity...

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Inorganic And Physical Chemistry Department, Indian Institute Of Science
Bangalore
560012

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