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Dr Fernando Dias' Outputs (13)

Time-resolved Photophysical Characterization of Triplet-Harvesting Organic Compounds at Oxygen-Free Environment Using an iCCD Camera (2018)
Journal Article
Pander, P., Data1, P., & Dias, F. B. (2018). Time-resolved Photophysical Characterization of Triplet-Harvesting Organic Compounds at Oxygen-Free Environment Using an iCCD Camera. Journal of Visualized Experiments, 142, Article e56614. https://doi.org/10.3791/56614

Here, we present a sensible method of the acquisition and analysis of time-resolved photoluminescence using an ultrafast iCCD camera. This system enables the acquisition of photoluminescence spectra covering the time regime from nanoseconds up to 0.1... Read More about Time-resolved Photophysical Characterization of Triplet-Harvesting Organic Compounds at Oxygen-Free Environment Using an iCCD Camera.

An iminodibenzyl–quinoxaline–iminodibenzyl scaffold as a mechanochromic and dual emitter: donor and bridge effects on optical properties (2018)
Journal Article
Pashazadeh, R., Pander, P., Bucinskas, A., Skabara, P. J., Dias, F. B., & Grazulevicius, J. V. (2018). An iminodibenzyl–quinoxaline–iminodibenzyl scaffold as a mechanochromic and dual emitter: donor and bridge effects on optical properties. Chemical Communications, 54(98), 13857-13860. https://doi.org/10.1039/c8cc06981f

The influence of phenyl linkage and donor strength on the photophysical properties of new derivatives of quinoxaline-containing iminodibenzyl and iminostilbene moieties is studied. The donor–acceptor derivatives showed dual thermally activated delaye... Read More about An iminodibenzyl–quinoxaline–iminodibenzyl scaffold as a mechanochromic and dual emitter: donor and bridge effects on optical properties.

Intramolecular Charge Transfer Controls Switching Between Room Temperature Phosphorescence and Thermally Activated Delayed Fluorescence (2018)
Journal Article
Chen, C., Huang, R., Batsanov, A., Pander, P., Hsu, Y.-T., Chi, Z., Dias, F., & Bryce, M. R. (2018). Intramolecular Charge Transfer Controls Switching Between Room Temperature Phosphorescence and Thermally Activated Delayed Fluorescence. Angewandte Chemie, 130(50), 16645-16649. https://doi.org/10.1002/ange.201809945

Chemical modification of phenothiazine–benzophenone derivatives is shown to tune the emission behavior from triplet states by selecting the molecular geometry of the intramolecular charge transfer (ICT) state. A fundamental principle of planar ICT (P... Read More about Intramolecular Charge Transfer Controls Switching Between Room Temperature Phosphorescence and Thermally Activated Delayed Fluorescence.

Bond Rotations and Heteroatom Effects in Donor-Acceptor-Donor Molecules: Implications for Thermally Activated Delayed Fluorescence and Room Temperature Phosphorescence (2018)
Journal Article
Ward, J. S., Nobuyasu, R. S., Fox, M. A., Batsanov, A. S., Santos, J., Dias, F. B., & Bryce, M. R. (2018). Bond Rotations and Heteroatom Effects in Donor-Acceptor-Donor Molecules: Implications for Thermally Activated Delayed Fluorescence and Room Temperature Phosphorescence. Journal of Organic Chemistry, 83(23), 14431-14442. https://doi.org/10.1021/acs.joc.8b02187

The synthesis of 1-methylphenoxazine via CO2-directed lithiation chemistry is reported. This electron donor was coupled with 2,8-dibenzothiophene-S,S-dioxide with Buchwald–Hartwig chemistry to give a new D–A–D charge-transfer fluorescent molecule 1b.... Read More about Bond Rotations and Heteroatom Effects in Donor-Acceptor-Donor Molecules: Implications for Thermally Activated Delayed Fluorescence and Room Temperature Phosphorescence.

Observation of Dual Room Temperature Fluorescence-Phosphorescence in Air, in the Crystal Form of a Thianthrene Derivative (2018)
Journal Article
Pander, P. H., Swist, A., Turczyn, R. M., Pouget, S., Djurado, D., Lazauskas, A., Pashazadeh, R., Grazulevicius, J. V., Motyka, R., Klimash, A., Skabara, P., Data, P., Sołoducho, J., & Dias, F. B. (2018). Observation of Dual Room Temperature Fluorescence-Phosphorescence in Air, in the Crystal Form of a Thianthrene Derivative. Journal of Physical Chemistry C, 122(43), 24958-24966. https://doi.org/10.1021/acs.jpcc.8b08329

Thianthrenes have been nearly forgotten as phosphors in recent years, but are now coming back, showing their strong potential in luminescent applications. Here, we present a comprehensive photophysical study of a carbazolyl derivative of thianthrene... Read More about Observation of Dual Room Temperature Fluorescence-Phosphorescence in Air, in the Crystal Form of a Thianthrene Derivative.

Intermolecular Interactions in Molecular Crystals and Their Effect on Thermally Activated Delayed Fluorescence of Helicene-Based Emitters (2018)
Journal Article
Klimash, A., Pander, P. H., Klooster, W., Coles, S., Data, P., Dias, F., & Skabara, P. (2018). Intermolecular Interactions in Molecular Crystals and Their Effect on Thermally Activated Delayed Fluorescence of Helicene-Based Emitters. Journal of Materials Chemistry C Materials for optical and electronic devices, 6(39), 10557-10568. https://doi.org/10.1039/c8tc03390k

Here, we discuss the influence of the crystal structure on the photophysical properties of two new TADF emitters containing a non-planar helical moiety. The presence of solvent in the crystal lattice of a diaza[5]helicene-based compound alters molecu... Read More about Intermolecular Interactions in Molecular Crystals and Their Effect on Thermally Activated Delayed Fluorescence of Helicene-Based Emitters.

The influence of molecular conformation on the photophysics of organic room temperature phosphorescent luminophores (2018)
Journal Article
Huang, R., Ward, J. S., Kukhta, N. A., Avó, J., Gibson, J., Penfold, T., Lima, J. C., Batsanov, A. S., Berberan-Santos, M. N., Bryce, M. R., & Dias, F. B. (2018). The influence of molecular conformation on the photophysics of organic room temperature phosphorescent luminophores. Journal of Materials Chemistry C Materials for optical and electronic devices, 10(34), 9238-9247. https://doi.org/10.1039/c8tc02987c

A series of novel donor–acceptor–donor (D–A–D) compounds featuring dibenzothiophene (DBT) and phenothiazine (PTZ) units are presented. A different degree of steric hindrance between the donor and acceptor fragments is achieved by the systematic chang... Read More about The influence of molecular conformation on the photophysics of organic room temperature phosphorescent luminophores.

Thermally-Activated Delayed Fluorescence in Polymer-Small Molecule Exciplex Blends for Solution-Processed Organic Light-Emitting Diodes (2018)
Journal Article
Pander, P. H., Gogoc, S., Colella, M., Data, P., & Dias, F. B. (2018). Thermally-Activated Delayed Fluorescence in Polymer-Small Molecule Exciplex Blends for Solution-Processed Organic Light-Emitting Diodes. ACS Applied Materials and Interfaces, 10(34), 28796-28802. https://doi.org/10.1021/acsami.8b07554

The photophysics of an exciplex state, formed between a small molecule and a polymer, is investigated in this work. The results obtained with this blend show the strong potential of polymer-small molecule blends for triplet harvesting in organic ligh... Read More about Thermally-Activated Delayed Fluorescence in Polymer-Small Molecule Exciplex Blends for Solution-Processed Organic Light-Emitting Diodes.

Thermally Activated Delayed Fluorescence with Narrow Emission Spectrum and Organic Room Temperature Phosphorescence by Controlling Spin-Orbit Coupling and Phosphorescence Lifetime of Metal-Free Organic Molecules (2018)
Journal Article
Pander, P. H., Swist, A., Soloducho, J., Dias, F., & Data, P. (2018). Thermally Activated Delayed Fluorescence with Narrow Emission Spectrum and Organic Room Temperature Phosphorescence by Controlling Spin-Orbit Coupling and Phosphorescence Lifetime of Metal-Free Organic Molecules. Journal of Materials Chemistry C Materials for optical and electronic devices, 6(20), 5434--5443. https://doi.org/10.1039/c8tc00175h

This work shows a study of two organic molecules with very similar, large singlet-triplet gap of which one is a TADF emitter and the other an RTP emitter. By investigation of photophysical properties of these compounds, it is possible to explain thei... Read More about Thermally Activated Delayed Fluorescence with Narrow Emission Spectrum and Organic Room Temperature Phosphorescence by Controlling Spin-Orbit Coupling and Phosphorescence Lifetime of Metal-Free Organic Molecules.

The theory of thermally activated delayed fluorescence for organic light emitting diodes (2018)
Journal Article
Penfold, T., Dias, F., & Monkman, A. (2018). The theory of thermally activated delayed fluorescence for organic light emitting diodes. Chemical Communications, 54(32), 3926-3935. https://doi.org/10.1039/c7cc09612g

The interest in organic molecules exhibiting Thermally Activated Delayed Fluorescence (TADF) has been reinvigorated in recent years owing to their potential to be exploited as emitters in highly efficient purely organic light emitting diodes (OLEDs).... Read More about The theory of thermally activated delayed fluorescence for organic light emitting diodes.

1,2,4-Triazines in the Synthesis of Bipyridine Bisphenolate O^N^N^O Ligands and Their Highly Luminescent Tetradentate Pt(II) Complexes for Solution-Processable OLEDs (2018)
Journal Article
Pander, P., Bulmer, R., Martinscroft, R., Thompson, S., Lewis, F., Penfold, T., …Kozhevnikov, V. (2018). 1,2,4-Triazines in the Synthesis of Bipyridine Bisphenolate O^N^N^O Ligands and Their Highly Luminescent Tetradentate Pt(II) Complexes for Solution-Processable OLEDs. Inorganic Chemistry, 57(7), 3825-3832. https://doi.org/10.1021/acs.inorgchem.7b03175

Easily accessible bis-1,2,4-triazines can be converted to corresponding pyridines by the Boger reaction, opening up convenient synthesis pathways to salen-type tetradentate dianionic ligands. The new ligands were used to prepare highly luminescent ON... Read More about 1,2,4-Triazines in the Synthesis of Bipyridine Bisphenolate O^N^N^O Ligands and Their Highly Luminescent Tetradentate Pt(II) Complexes for Solution-Processable OLEDs.

Multicolor Luminescence Switching and Controllable Thermally Activated Delayed Fluorescence Turn on/Turn off in Carbazole–Quinoxaline–Carbazole Triads (2018)
Journal Article
Pashazadeh, R., Pander, P., Lazauskas, A., Dias, F. B., & Grazulevicius, J. V. (2018). Multicolor Luminescence Switching and Controllable Thermally Activated Delayed Fluorescence Turn on/Turn off in Carbazole–Quinoxaline–Carbazole Triads. Journal of Physical Chemistry Letters, 9(5), 1172-1177. https://doi.org/10.1021/acs.jpclett.8b00136

We report a series of thermally activated delayed fluorescence (TADF) molecules with mechanochromic luminescence properties and reversible TADF turn on/off properties in solid state that are induced by the transition between amorphous and crystalline... Read More about Multicolor Luminescence Switching and Controllable Thermally Activated Delayed Fluorescence Turn on/Turn off in Carbazole–Quinoxaline–Carbazole Triads.