Dr Fernando Dias' Outputs (123)

Intramolecular interchromophore singlet-singlet and triplet-singlet energy transfer in a metal-free donor-acceptor emitter (2021)
Journal Article
Tavares, I. G., Enkvist, E., Kaimre, J., Uri, A., & Dias, F. B. (2021). Intramolecular interchromophore singlet-singlet and triplet-singlet energy transfer in a metal-free donor-acceptor emitter. Journal of Luminescence, 237, Article 118183. https://doi.org/10.1016/j.jlumin.2021.118183

In this work we demonstrate the occurrence of singlet to singlet, and triplet to singlet, intramolecular energy transfer between two thiophene-comprising donors (D) and a central perylene bisimide acceptor (A) covalently linked to each other trough a... Read More about Intramolecular interchromophore singlet-singlet and triplet-singlet energy transfer in a metal-free donor-acceptor emitter.

Acridone-amine D-A-D thermally activated delayed fluorescence emitters with narrow resolved electroluminescence and their electrochromic properties (2021)
Journal Article
Vasylieva, M., Pander, P., Sharma, B. K., Shaikh, A. M., Kamble, R. M., Dias, F. B., Czichy, M., & Data, P. (2021). Acridone-amine D-A-D thermally activated delayed fluorescence emitters with narrow resolved electroluminescence and their electrochromic properties. Electrochimica Acta, 384, Article 138487. https://doi.org/10.1016/j.electacta.2021.138347

Acridones have found their role in luminescent materials for OLEDs. Most interestingly, showing potential as weak charge transfer thermally activated delayed fluorescence (TADF) emitters, providing narrow photoluminescence. In this work, we present a... Read More about Acridone-amine D-A-D thermally activated delayed fluorescence emitters with narrow resolved electroluminescence and their electrochromic properties.

Exceptionally Fast Radiative Decay of a Dinuclear Platinum Complex Through Thermally Activated Delayed Fluorescence (2021)
Journal Article
Pander, P. H., Daniels, R., Zaytsev, A., Horn, A., Sil, A., Penfold, T., Williams, G., Kozhevnikov, V. N., & Dias, F. B. (2021). Exceptionally Fast Radiative Decay of a Dinuclear Platinum Complex Through Thermally Activated Delayed Fluorescence. Chemical Science, 12(17), 6172-6180. https://doi.org/10.1039/d1sc00160d

A novel dinuclear platinum(II) complex featuring a ditopic, bis-tetradentate ligand has been prepared. The ligand offers each metal ion a planar O^N^C^N coordination environment, with the two metal ions bound to the nitrogen atoms of a bridging pyrim... Read More about Exceptionally Fast Radiative Decay of a Dinuclear Platinum Complex Through Thermally Activated Delayed Fluorescence.

Enhancement of thermally activated delayed fluorescence properties by substitution of ancillary halogen in a multiple resonance-like diplatinum(ii) complex (2021)
Journal Article
Pander, P., Zaytsev, A. V., Sil, A., Williams, J. G., Kozhevnikov, V. N., & Dias, F. B. (2022). Enhancement of thermally activated delayed fluorescence properties by substitution of ancillary halogen in a multiple resonance-like diplatinum(ii) complex. Journal of Materials Chemistry C Materials for optical and electronic devices, 10(12), 4851-4860. https://doi.org/10.1039/d1tc05026e

We present an in-depth investigation of the influence of chloro-to-iodo exchange on the thermally activated delayed fluorescence (TADF) of a dinuclear platinum(II) complex featuring monodentate halide ancillary ligands. The complexes are constructed... Read More about Enhancement of thermally activated delayed fluorescence properties by substitution of ancillary halogen in a multiple resonance-like diplatinum(ii) complex.

Cyclophane Molecules Exhibiting Thermally Activated Delayed Fluorescence: Linking Donor Units to Influence Molecular Conformation (2020)
Journal Article
Hempe, M., Harrison, A. K., Ward, J. S., Batsanov, A. S., Fox, M. A., Dias, F. B., & Bryce, M. R. (2021). Cyclophane Molecules Exhibiting Thermally Activated Delayed Fluorescence: Linking Donor Units to Influence Molecular Conformation. Journal of Organic Chemistry, 86(1), 429-445. https://doi.org/10.1021/acs.joc.0c02174

The synthetic methodology to covalently link donors to form cyclophane-based thermally activated delayed fluorescence (TADF) molecules is presented. These are the first reported examples of TADF cyclophanes with “electronically innocent” bridges betw... Read More about Cyclophane Molecules Exhibiting Thermally Activated Delayed Fluorescence: Linking Donor Units to Influence Molecular Conformation.

Extended ligand conjugation and dinuclearity as a route to efficient platinum-based near-infrared (NIR) triplet emitters and solution-processed NIR-OLEDs (2020)
Journal Article
Shafikov, M. Z., Pander, P., Zaytsev, A. V., Daniels, R., Martinscroft, R., Dias, F. B., Williams, J. G., & Kozhevnikov, V. N. (2021). Extended ligand conjugation and dinuclearity as a route to efficient platinum-based near-infrared (NIR) triplet emitters and solution-processed NIR-OLEDs. Journal of Materials Chemistry C Materials for optical and electronic devices, 9(1), 127-135. https://doi.org/10.1039/d0tc04881j

Near infrared (NIR) emission from molecular materials is typically targeted by using more extended conjugated systems compared to visible-emitting materials. But efficiencies usually fall off due to the combined effects of increasing non-radiative an... Read More about Extended ligand conjugation and dinuclearity as a route to efficient platinum-based near-infrared (NIR) triplet emitters and solution-processed NIR-OLEDs.

Benzannulation via the use of 1,2,4-triazines extends aromatic system of cyclometallated Pt(II) complexes to achieve candle light electroluminescence (2020)
Journal Article
Pander, P., Turnbull, G., Zaytsev, A. V., Dias, F. B., & Kozhevnikov, V. N. (2021). Benzannulation via the use of 1,2,4-triazines extends aromatic system of cyclometallated Pt(II) complexes to achieve candle light electroluminescence. Dyes and Pigments, 184, Article 108857. https://doi.org/10.1016/j.dyepig.2020.108857

This work describes an application of 1,2,4-triazine methodology for the synthesis of novel cyclometallated Pt (II) complexes of C^N type. It is shown that addition of a cyclopenteno unit into the complex structure not only facilitates the fabricatio... Read More about Benzannulation via the use of 1,2,4-triazines extends aromatic system of cyclometallated Pt(II) complexes to achieve candle light electroluminescence.

Luminescent halogen-substituted 2-(N-arylimino)pyrrolyl boron complexes: the internal heavy-atom effect (2020)
Journal Article
Rodrigues, A. I., Krishnamoorthy, P., Gomes, C. S., Carmona, N., Di Paolo, R. E., Pander, P., Pina, J., Sérgio Seixas de Melo, J., Dias, F. B., Calhorda, M. J., Maçanita, A. L., Morgado, J., & Gomes, P. T. (2020). Luminescent halogen-substituted 2-(N-arylimino)pyrrolyl boron complexes: the internal heavy-atom effect. Dalton Transactions, 49(29), 10185-10202. https://doi.org/10.1039/d0dt01845g

A group of new boron complexes [BPh2{2N,N’-NC4H3-2-C(H)=N-C6H4X}] (X= 4-Cl 4c, 4-Br 4d, 4-I 4e, 3-Br 4f, 2-Br 4g, 2-I 4h) containing different halogens as substituents in the N-aryl ring have been synthesized and characterized in terms of their mole... Read More about Luminescent halogen-substituted 2-(N-arylimino)pyrrolyl boron complexes: the internal heavy-atom effect.

TADF Dye-Loaded Nanoparticles for Fluorescence Live-Cell Imaging (2020)
Journal Article
Crucho, C. I., Avó, J., Diniz, A. M., Pinto, S. N., Barbosa, J., Smith, P. O., Berberan-Santos, M. N., Pålsson, L.-O., & Dias, F. B. (2020). TADF Dye-Loaded Nanoparticles for Fluorescence Live-Cell Imaging. Frontiers in Chemistry, 8, Article 404. https://doi.org/10.3389/fchem.2020.00404

Thermally activated delayed fluorescence (TADF) molecules offer nowadays a powerful tool in the development of novel organic light emitting diodes due to their capability of harvesting energy from non-emissive triplet states without using heavy-metal... Read More about TADF Dye-Loaded Nanoparticles for Fluorescence Live-Cell Imaging.

Toward Efficient Toxic-Gas Detectors: Exploring Molecular Interactions of Sarin and Dimethyl Methylphosphonate with Metal-Centered Phthalocyanine Structures (2020)
Journal Article
Aldahhak, H., Powroźnik, P., Pander, P., Jakubik, W., Dias, F. B., Schmidt, W. G., Gerstmann, U., & Krzywiecki, M. (2020). Toward Efficient Toxic-Gas Detectors: Exploring Molecular Interactions of Sarin and Dimethyl Methylphosphonate with Metal-Centered Phthalocyanine Structures. Journal of Physical Chemistry C, 124(11), 6090-6102. https://doi.org/10.1021/acs.jpcc.9b11116

The rapid and reliable detection of lethal agents such as sarin is of increasing importance. Here, density-functional theory (DFT) is used to compare the interaction of sarin with single-metal-centered phthalocyanine (MPc) and MPc layer structures to... Read More about Toward Efficient Toxic-Gas Detectors: Exploring Molecular Interactions of Sarin and Dimethyl Methylphosphonate with Metal-Centered Phthalocyanine Structures.

Achieving 21% External Quantum Efficiency for Nondoped Solution-Processed Sky-Blue Thermally Activated Delayed Fluorescence OLEDs by Means of Multi-Donor/Acceptor Emitter with Through-Space/-Bond Charge Transfer (2020)
Journal Article
Zheng, X., Huang, R., Zhong, C., Xie, G., Ning, W., Huang, M., Ni, F., Dias, F. B., & Yang, C. (2020). Achieving 21% External Quantum Efficiency for Nondoped Solution-Processed Sky-Blue Thermally Activated Delayed Fluorescence OLEDs by Means of Multi-Donor/Acceptor Emitter with Through-Space/-Bond Charge Transfer. Advanced Science, 7(7), Article 1902087. https://doi.org/10.1002/advs.201902087

Although numerous thermally activated delayed fluorescence (TADF) organic light-emitting diodes (OLEDs) have been demonstrated, the efficient blue or even sky-blue TADF-based non-doped solution-processed devices are still very rare. Herein, we skilfu... Read More about Achieving 21% External Quantum Efficiency for Nondoped Solution-Processed Sky-Blue Thermally Activated Delayed Fluorescence OLEDs by Means of Multi-Donor/Acceptor Emitter with Through-Space/-Bond Charge Transfer.

Unusual dual-emissive heteroleptic iridium complexes incorporating TADF cyclometalating ligands (2020)
Journal Article
Benjamin, H., Zheng, Y., Kozhevnikov, V. N., Siddle, J. S., O'Driscoll, L. J., Fox, M. A., Batsanov, A. S., Griffiths, G. C., Dias, F. B., Monkman, A. P., & Bryce, M. R. (2020). Unusual dual-emissive heteroleptic iridium complexes incorporating TADF cyclometalating ligands. Dalton Transactions, 49(7), 2190-2208. https://doi.org/10.1039/c9dt04672k

Five new neutral heteroleptic iridium(III) complexes IrL2(pic) (2–6) based on the archetypical blue emitter FIrpic have been synthesised. The cyclometallating ligands L are derived from 2-(2,6-F2-3-pyridyl)-4-mesitylpyridine (7), 2-(3-cyano-2,6-F2-ph... Read More about Unusual dual-emissive heteroleptic iridium complexes incorporating TADF cyclometalating ligands.

Donor-acceptor 1,2,4,5-Tetrazines Prepared by Buchwald-Hartwig Cross-Coupling Reaction and Their Photoluminescence Turn-on Property by Inverse Electron Demand Diels-Alder Reaction (2020)
Journal Article
Qu, Y., Pander, P. H., Vybornyi, O., Vasylieva, M., Guillot, R., Miomandre, F., Dias, F. B., Skabara, P. J., Data, P., Clavier, G., & Audebert, P. (2020). Donor-acceptor 1,2,4,5-Tetrazines Prepared by Buchwald-Hartwig Cross-Coupling Reaction and Their Photoluminescence Turn-on Property by Inverse Electron Demand Diels-Alder Reaction. Journal of Organic Chemistry, 85(5), 3407-3416. https://doi.org/10.1021/acs.joc.9b02817

A facile efficient synthetic tool, Buchwald-Hartwig cross-coupling reaction, for the functionalization of 1,2,4,5-tetrazines is presented. Important factors affecting the Buchwald-Hartwig cross-coupling reaction have been optimized. Seven new donor-a... Read More about Donor-acceptor 1,2,4,5-Tetrazines Prepared by Buchwald-Hartwig Cross-Coupling Reaction and Their Photoluminescence Turn-on Property by Inverse Electron Demand Diels-Alder Reaction.

Silica nanoparticles with thermally activated delayed fluorescence for live cell imaging (2019)
Journal Article
Crucho, C. I., Avó, J., Nobuyasu, R., N. Pinto, S., Fernandes, F., Lima, J. C., Berberan-Santos, M. N., & Dias, F. B. (2020). Silica nanoparticles with thermally activated delayed fluorescence for live cell imaging. Materials Science and Engineering: C, 109, Article 110528. https://doi.org/10.1016/j.msec.2019.110528

Thermally activated delayed fluorescence (TADF) has revolutionized the field of organic light emitting diodes owing to the possibility of harvesting non-emissive triplet states and converting them in emissive singlet states. This mechanism generates... Read More about Silica nanoparticles with thermally activated delayed fluorescence for live cell imaging.

Balancing charge-transfer strength and triplet states for deep-blue thermally activated delayed fluorescence with an unconventional electron rich dibenzothiophene acceptor (2019)
Journal Article
Huang, R., Kukhta, N., Ward, J., Danos, A., Batsanov, A., Bryce, M., & Dias, F. (2019). Balancing charge-transfer strength and triplet states for deep-blue thermally activated delayed fluorescence with an unconventional electron rich dibenzothiophene acceptor. Journal of Materials Chemistry C Materials for optical and electronic devices, 7(42), 13224-13234. https://doi.org/10.1039/c9tc02175b

Manipulation of the emission properties of deep-blue emitters exhibiting thermally activated delayed fluorescence (TADF) through molecular design is challenging. We present an effective strategy to probe deeper into the role of localized (LE) and cha... Read More about Balancing charge-transfer strength and triplet states for deep-blue thermally activated delayed fluorescence with an unconventional electron rich dibenzothiophene acceptor.

Achieving Conformational Control in RTP and TADF Emitters by Functionalization of the Central Core (2019)
Journal Article
Kukhta, N., Huang, R., Batsanov, A., Bryce, M., & Dias, F. (2019). Achieving Conformational Control in RTP and TADF Emitters by Functionalization of the Central Core. Journal of Physical Chemistry C, 123(43), 26536-26546. https://doi.org/10.1021/acs.jpcc.9b08238

Three new symmetrical donor–acceptor–donor (D–A–D)-type molecules were prepared with phenothiazine (PTZ) as electron donors and 9,9-dimethylthioxanthene (TX) as the electron acceptor. The PTZ groups are attached at different positions on the acceptor... Read More about Achieving Conformational Control in RTP and TADF Emitters by Functionalization of the Central Core.

The influence of molecular geometry on the efficiency of thermally activated delayed fluorescence (2019)
Journal Article
Nobuyasu, R. S., Ward, J. S., Gibson, J., Laidlaw, B. A., Ren, Z., Data, P., Batsanov, A. S., Penfold, T. J., Bryce, M. R., & Dias, F. B. (2019). The influence of molecular geometry on the efficiency of thermally activated delayed fluorescence. Journal of Materials Chemistry C Materials for optical and electronic devices, 7(22), 6672-6684. https://doi.org/10.1039/c9tc00720b

In this work we successfully developed a strategy for positively influencing the conformation of thermally activated delayed fluorescence (TADF) molecules containing phenothiazine as the electron donor (D) unit, and dibenzothiophene-S,S-dioxide as th... Read More about The influence of molecular geometry on the efficiency of thermally activated delayed fluorescence.

Impact of Methoxy Substituents on Thermally Activated Delayed Fluorescence and Room-Temperature Phosphorescence in All-Organic Donor–Acceptor Systems (2019)
Journal Article
Ward, J. S., Nobuyasu, R. S., Fox, M. A., Aguilar, J. A., Hall, D., Batsanov, A. S., Ren, Z., Dias, F. B., & Bryce, M. R. (2019). Impact of Methoxy Substituents on Thermally Activated Delayed Fluorescence and Room-Temperature Phosphorescence in All-Organic Donor–Acceptor Systems. Journal of Organic Chemistry, 84(7), 3801-3816. https://doi.org/10.1021/acs.joc.8b02848

Thermally activated delayed fluorescence (TADF) and room-temperature phosphorescence (RTP) are known to occur in organic D–A–D and D–A systems where the donor group contains the phenothiazine unit and the acceptor is dibenzothiophene-S,S-dioxide. Thi... Read More about Impact of Methoxy Substituents on Thermally Activated Delayed Fluorescence and Room-Temperature Phosphorescence in All-Organic Donor–Acceptor Systems.

Homoleptic platinum(ii) complexes with pyridyltriazole ligands: excimer-forming phosphorescent emitters for solution-processed OLEDs (2019)
Journal Article
Walden, M. T., Pander, P., Yufit, D. S., Dias, F. B., & Williams, J. G. (2019). Homoleptic platinum(ii) complexes with pyridyltriazole ligands: excimer-forming phosphorescent emitters for solution-processed OLEDs. Journal of Materials Chemistry C Materials for optical and electronic devices, 7(22), 6592--6606. https://doi.org/10.1039/c9tc00768g

Two new homoleptic platinum(II) complexes are reported that feature aryl-appended 5-(2-pyridyl)-1,2,4- triazole chelates acting as N^N ligating ions, PtL1 2 and PtL2 2. Readily prepared from easily accessible proligands, they offer good solubility in... Read More about Homoleptic platinum(ii) complexes with pyridyltriazole ligands: excimer-forming phosphorescent emitters for solution-processed OLEDs.

Realizing 20% External Quantum Efficiency in Electroluminescence with Efficient Thermally Activated Delayed Fluorescence from an Exciplex (2019)
Journal Article
Chapran, M., Pander, P. H., Vasylieva, M., Wiosna-Sałyga, G., Ulanski, J., Dias, F. B., & Data, P. (2019). Realizing 20% External Quantum Efficiency in Electroluminescence with Efficient Thermally Activated Delayed Fluorescence from an Exciplex. ACS Applied Materials and Interfaces, 11(14), 13460-13471. https://doi.org/10.1021/acsami.8b18284

Herein we report the investigation of non-doped exciplex formed in blends of 2,4,6-Tris[3-(diphenylphosphinyl)phenyl]-1,3,5-triazine (PO-T2T), working as the one-electron acceptor molecule, with different electron donors. The emission of these excipl... Read More about Realizing 20% External Quantum Efficiency in Electroluminescence with Efficient Thermally Activated Delayed Fluorescence from an Exciplex.