The Chem. Sci. journal features on its front cover of the November 2025 issue the research article “Enhancing the Statistical Probability Factor in Triplet-Triplet Annihiltaion Photon Upconversion via TIPS Functionalization” by Carles Alcaide, Prof Miquel Solà in collaboration with  Kasper Moth-Poulsen group.

This work shows the infl uence of triisopropylsilyl functionalization on annihilators in triplet–triplet annihilation photon upconversion, specifi cally focusing on their spin statistical probability factor (f). The f determines the probability of singlet generation after triplet coupling. A new green-emitting annihilator 3,9-bis((triisopropylsilyl) ethynyl)perylene (TIPS-PY) was synthesized, which shows a high red-to-green TTA-UC quantum yield, = 13.7% due to high f = 39.25%). Computation analysis revealed that high f of TIPS-PY, resulted from enhanced coupling of the triplet-pair state with the singlet state due to high singlet character of the triplet state.

The corresponding paper was published recently:

Lukas Naimovicius, Manvydas Dapkevicius, Edvinas Radiunas, Mila Miroshnichenko, Gediminas Kreiza, Carles Alcaide, Paulius Baronas, Yoichi Sasaki, Nobuhiro Yanai, Nobuo Kimizuka, Andrew Brian Pun, Miquel Solà, Pankaj Bharmoria, Karolis Kazlauskas, Kasper Moth-Poulsen
Enhancing the Statistical Probability Factor in Triplet-Triplet Annihiltaion Photon Upconversion via TIPS Functionalization
Chem. Sci., 2025, 16, 20255-20264
DOI: 10.1039/d5sc05248c

Girona, November 7th, 2025
For more info: ges.iqcc@udg.edu