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Rigid and planar π-conjugated molecules leading to long-lived intramolecular charge-transfer states exhibiting thermally activated delayed fluorescence (2024)
Journal Article
Kuila, S., Miranda-Salinas, H., Eng, J., Li, C., Bryce, M. R., Penfold, T. J., & Monkman, A. P. (2024). Rigid and planar π-conjugated molecules leading to long-lived intramolecular charge-transfer states exhibiting thermally activated delayed fluorescence. Nature Communications, 15, Article 9611. https://doi.org/10.1038/s41467-024-53740-1

Intramolecular charge transfer (ICT) occurs when photoexcitation causes electron transfer from an electron donor to an electron acceptor within the same molecule and is usually stabilized by decoupling of the donor and acceptor through an orthogonal... Read More about Rigid and planar π-conjugated molecules leading to long-lived intramolecular charge-transfer states exhibiting thermally activated delayed fluorescence.

Exploring the Early Time Behavior of the Excited States of an Archetype Thermally Activated Delayed Fluorescence Molecule (2024)
Journal Article
Franca, L., Danos, A., Saxena, R., Kuila, S., Stavrou, K., Li, C., …Monkman, A. P. (2024). Exploring the Early Time Behavior of the Excited States of an Archetype Thermally Activated Delayed Fluorescence Molecule. Journal of Physical Chemistry Letters, 15(6), 1734-1740. https://doi.org/10.1021/acs.jpclett.4c00030

Optical pump–probe techniques allow for an in-depth study of dark excited states. Here, we utilize them to map and gain insights into the excited states involved in the thermally activated delayed fluorescence (TADF) mechanism of a benchmark TADF emi... Read More about Exploring the Early Time Behavior of the Excited States of an Archetype Thermally Activated Delayed Fluorescence Molecule.

Covalently linked pyrene antennas for optically dense yet aggregation-resistant light-harvesting systems (2023)
Journal Article
Salah, L., Makhseed, S., Ghazal, B., Abdel Nazeer, A., Etherington, M. K., Ponseca Jr., C. S., …Shuaib, A. (2023). Covalently linked pyrene antennas for optically dense yet aggregation-resistant light-harvesting systems. Physical Chemistry Chemical Physics, 25(36), 24878-24882. https://doi.org/10.1039/d3cp02586a

In this study we present a novel energy transfer material inspired by natural light-harvesting antenna arrays, zinc(II) phthalocyanine-pyrene (ZnPcPy). The ZnPcPy system facilitates energy transfer from 16 covalently linked pyrene (Py) donor chromoph... Read More about Covalently linked pyrene antennas for optically dense yet aggregation-resistant light-harvesting systems.

The Effect of Imide Substituents on the Excited State Properties of Perylene Diimide Derivatives (2022)
Journal Article
Aksoy, E., Danos, A., Li, C., Monkman, A., & Varlikli, C. (2022). The Effect of Imide Substituents on the Excited State Properties of Perylene Diimide Derivatives. Turkish journal of science and technology, 17(1), 11-21. https://doi.org/10.55525/tjst.952823

Solid state optical properties of fluorescent materials are important for many photonic devices such as organic light emitting diodes, frequency down-converters or luminescent solar concentrators. Perylene diimides (PDIs) represent one of the most po... Read More about The Effect of Imide Substituents on the Excited State Properties of Perylene Diimide Derivatives.

Silylethynyl Substitution for Preventing Aggregate Formation in Perylene Diimides (2021)
Journal Article
Aksoy, E., Danos, A., Li, C., Monkman, A. P., & Varlikli, C. (2021). Silylethynyl Substitution for Preventing Aggregate Formation in Perylene Diimides. Journal of Physical Chemistry C, 125(23), 13041-13049. https://doi.org/10.1021/acs.jpcc.1c03131

Ethynylene-bridged perylene diimides (PDIs) with different sized silane groups have been synthesized as a steric blocking group to prevent the formation of non-radiative trap sites, for example, strong H-aggregates and other dimers or excimers. Excit... Read More about Silylethynyl Substitution for Preventing Aggregate Formation in Perylene Diimides.

The Critical Role of nπ* States in the Photophysics and Thermally Activated Delayed Fluorescence of Spiro Acridine-Anthracenone (2021)
Journal Article
Gomes Franca, L., Long, Y., Li, C., Danos, A., & Monkman, A. (2021). The Critical Role of nπ* States in the Photophysics and Thermally Activated Delayed Fluorescence of Spiro Acridine-Anthracenone. Journal of Physical Chemistry Letters, 12(5), 1490-1500. https://doi.org/10.1021/acs.jpclett.0c03314

The molecular photophysics and thermally activated delayed fluorescence (TADF) in spiro compounds are distinct because of the rigid orthogonal C–C bridging bond between donor and acceptor. The photophysics is found to be highly complex, with unpreced... Read More about The Critical Role of nπ* States in the Photophysics and Thermally Activated Delayed Fluorescence of Spiro Acridine-Anthracenone.

Excited State Dynamics of Thermally Activated Delayed Fluorescence from an Excited State Intramolecular Proton Transfer System (2020)
Journal Article
Long, Y., Mamada, M., Li, C., dos Santos, P. L., Colella, M., Danos, A., Adachi, C., & Monkman, A. (2020). Excited State Dynamics of Thermally Activated Delayed Fluorescence from an Excited State Intramolecular Proton Transfer System. Journal of Physical Chemistry Letters, 11(9), 3305-3312. https://doi.org/10.1021/acs.jpclett.0c00498

We describe the photophysical processes that give rise to thermally activated delayed fluorescence in the excited state intramolecular proton transfer (ESIPT) molecule, triquinolonobenzene (TQB). Using transient absorption and time-resolved photolumi... Read More about Excited State Dynamics of Thermally Activated Delayed Fluorescence from an Excited State Intramolecular Proton Transfer System.