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Heavy‐Atom Free Bodipy‐Borafluorene Photosensitizer Decorated with Coumarin Antenna Selectively Staining Endoplasmic Reticulum for Application in PDT (2025)
Journal Article
Wrochna, K., Natkowski, D. R., Blacha‐Grzechnik, A., Pluczyk‐Malek, S., Armstrong, C. B., Mastroeni, P. J., Black, D. J., Pal, R., Durka, K., Marek‐Urban, P. H., & Stachelek, P. (online). Heavy‐Atom Free Bodipy‐Borafluorene Photosensitizer Decorated with Coumarin Antenna Selectively Staining Endoplasmic Reticulum for Application in PDT. Chemistry - A European Journal, Article e01949. https://doi.org/10.1002/chem.202501949

The organelle‐localized photodynamic therapy (PDT) has become a promising strategy for efficient cancer treatment. The photogeneration of reactive oxygen species in the endoplasmic reticulum (ER) leads to lipid oxidation and causes cell apoptosis or... Read More about Heavy‐Atom Free Bodipy‐Borafluorene Photosensitizer Decorated with Coumarin Antenna Selectively Staining Endoplasmic Reticulum for Application in PDT.

Circularly Polarized Luminescence Bioimaging Using Chiral BODIPYs: A Model Scaffold for Advancing Unprecedented CPL Microscopy Using Small Full-Organic Probes. (2024)
Journal Article
Stachelek, P., Serrano-Buitrago, S., Maroto, B. L., Pal, R., & de la Moya, S. (2024). Circularly Polarized Luminescence Bioimaging Using Chiral BODIPYs: A Model Scaffold for Advancing Unprecedented CPL Microscopy Using Small Full-Organic Probes. ACS Applied Materials and Interfaces, 16(49), https://doi.org/10.1021/acsami.4c14127

Unprecedented circularly polarized luminescence bioimaging (CPL-bioimaging) of live cells using small full-organic probes is first reported. These highly biocompatible and adaptable probes are pivotal to advance emerging CPL Laser-Scanning Confocal M... Read More about Circularly Polarized Luminescence Bioimaging Using Chiral BODIPYs: A Model Scaffold for Advancing Unprecedented CPL Microscopy Using Small Full-Organic Probes..

Ligand Chirality Transfer from Solution State to the Crystalline Self‐Assemblies in Circularly Polarized Luminescence (CPL) Active Lanthanide Systems (2024)
Journal Article
Caffrey, D. F., Gorai, T., Rawson, B., Martínez‐Calvo, M., Kitchen, J. A., Murray, N. S., …Gunnlaugsson, T. (2024). Ligand Chirality Transfer from Solution State to the Crystalline Self‐Assemblies in Circularly Polarized Luminescence (CPL) Active Lanthanide Systems. Advanced Science, 11(18), Article 2307448. https://doi.org/10.1002/advs.202307448

The synthesis of a family of chiral and enantiomerically pure pyridyl‐diamide (pda) ligands that upon complexation with europium [Eu(CF3SO3)3] result in chiral complexes with metal centered luminescence is reported; the sets of enantiomers giving ris... Read More about Ligand Chirality Transfer from Solution State to the Crystalline Self‐Assemblies in Circularly Polarized Luminescence (CPL) Active Lanthanide Systems.

Recent advances in highly-efficient near infrared OLED emitters (2024)
Journal Article
dos Santos, P. L., Stachelek, P., Takeda, Y., & Pander, P. (2024). Recent advances in highly-efficient near infrared OLED emitters. Materials Chemistry Frontiers, 8(7), 1731-1766. https://doi.org/10.1039/d3qm01067h

Near infrared (NIR) light (700–1400 nm) can be used in numerous biological/medical as well as technological applications. In this work we review the most recent examples of highly efficient NIR organic light-emitting diode (OLED) emitters among the m... Read More about Recent advances in highly-efficient near infrared OLED emitters.

Rapid handheld time-resolved circularly polarised luminescence photography camera for life and material sciences (2023)
Journal Article
De Rosa, D. F., Brook, P., Black, D. J., & Pal, R. (2023). Rapid handheld time-resolved circularly polarised luminescence photography camera for life and material sciences. Nature Communications, 14, Article 1537. https://doi.org/10.1038/s41467-023-37329-8

Circularly polarised luminescence (CPL) is gaining a rapidly increasing following and finding new applications in both life and material sciences. Spurred by recent instrumental advancements, the development of CPL active chiral emitters is going thr... Read More about Rapid handheld time-resolved circularly polarised luminescence photography camera for life and material sciences.

Near-Infrared Circularly Polarised Luminescence from Helically Extended Chiral N,N,O,O -Boron Chelated Dipyrromethenes (2022)
Journal Article
Algoazy, N., Clarke, R. G., Penfold, T. J., Waddell, P. G., Probert, M. R., Aerts, R., Herrebout, W., Stachelek, P., Pal, R., Hall, M. J., & Knight, J. G. (2022). Near-Infrared Circularly Polarised Luminescence from Helically Extended Chiral N,N,O,O -Boron Chelated Dipyrromethenes. ChemPhotoChem, 6(9), Article e202200090. https://doi.org/10.1002/cptc.202200090

Synthetically straightforward π-extension of helically chiral N,N,O,O-boron chelated borondipyrromethenes (BODIPYs) has been achieved by incorporation of naphthyl rings into the BODIPY 3- and 5-positions. The effect of this extension on the photophys... Read More about Near-Infrared Circularly Polarised Luminescence from Helically Extended Chiral N,N,O,O -Boron Chelated Dipyrromethenes.

The Pink Box: Exclusive Homochiral Aromatic Stacking in a Bis-perylene Diimide Macrocycle (2022)
Journal Article
Penty, S. E., Zwijnenburg, M. A., Orton, G. R., Stachelek, P., Pal, R., Xie, Y., Griffin, S. L., & Barendt, T. A. (2022). The Pink Box: Exclusive Homochiral Aromatic Stacking in a Bis-perylene Diimide Macrocycle. Journal of the American Chemical Society, 144(27), 12290-12298. https://doi.org/10.1021/jacs.2c03531

This work showcases chiral complementarity in aromatic stacking interactions as an effective tool to optimize the chiroptical and electrochemical properties of perylene diimides (PDIs). PDIs are a notable class of robust dye molecules and their rich... Read More about The Pink Box: Exclusive Homochiral Aromatic Stacking in a Bis-perylene Diimide Macrocycle.

Circularly polarised luminescence laser scanning confocal microscopy to study live cell chiral molecular interactions (2022)
Journal Article
Stachelek, P., MacKenzie, L., Parker, D., & Pal, R. (2022). Circularly polarised luminescence laser scanning confocal microscopy to study live cell chiral molecular interactions. Nature Communications, 13(1), Article 533. https://doi.org/10.1038/s41467-022-28220-z

The molecular machinery of life is founded on chiral building blocks, but no experimental technique is currently available to distinguish or monitor chiral systems in live cell bio-imaging studies. Luminescent chiral molecules encode a unique optical... Read More about Circularly polarised luminescence laser scanning confocal microscopy to study live cell chiral molecular interactions.

The Impact of C2 Insertion into a Carbazole Donor on the Physicochemical Properties of Dibenzo[a,j]phenazine-Cored Donor–Acceptor–Donor Triads (2021)
Journal Article
Zimmermann Crocomo, P., Kaihara, T., Kawaguchi, S., Stachelek, P., Minakata, S., Silva, P., Data, P., & Takeda, Y. (2021). The Impact of C2 Insertion into a Carbazole Donor on the Physicochemical Properties of Dibenzo[a,j]phenazine-Cored Donor–Acceptor–Donor Triads. Chemistry - A European Journal, 27(53), 13390-13398. https://doi.org/10.1002/chem.202101654

Novel electron donor–acceptor–donor (D-A-D) compounds comprising dibenzo[a,j]phenazine as the central acceptor core and two 7-membered diarylamines (iminodibenzyl and iminostilbene) as the donors have been designed and synthesized. Investigation of t... Read More about The Impact of C2 Insertion into a Carbazole Donor on the Physicochemical Properties of Dibenzo[a,j]phenazine-Cored Donor–Acceptor–Donor Triads.

Are the Rates of Dexter Transfer in TADF Hyperfluorescence Systems Optically Accessible? (2021)
Journal Article
Haase, N., Danos, A., Pflumm, C., Stachelek, P., Brütting, W., & Monkman, A. P. (2021). Are the Rates of Dexter Transfer in TADF Hyperfluorescence Systems Optically Accessible?. Materials Horizons, 8(6), 1805-1815. https://doi.org/10.1039/d0mh01666g

Seemingly not, but for unexpected reasons. Combining the triplet harvesting properties of TADF materials with the fast emission rates and colour purity of fluorescent emitters is attractive for developing high performance OLEDs. In this “hyperfluores... Read More about Are the Rates of Dexter Transfer in TADF Hyperfluorescence Systems Optically Accessible?.

Exploiting trifluoromethyl substituents for tuning orbital character of singlet and triplet states to increase the rate of thermally activated delayed fluorescence (2020)
Journal Article
Ward, J. S., Danos, A., Stachelek, P., Fox, M. A., Batsanov, A. S., Monkman, A. P., & Bryce, M. R. (2020). Exploiting trifluoromethyl substituents for tuning orbital character of singlet and triplet states to increase the rate of thermally activated delayed fluorescence. Materials Chemistry Frontiers, 4(12), https://doi.org/10.1039/d0qm00429d

Electrochemical and Spectroelectrochemical Comparative Study of Macrocyclic Thermally Activated Delayed Fluorescent Compounds: Molecular Charge Stability vs OLED EQE Roll‐Off (2020)
Journal Article
Nyga, A., Izumi, S., Higginbotham, H. F., Stachelek, P., Pluczyk, S., de Silva, P., Minakata, S., Takeda, Y., & Data, P. (2020). Electrochemical and Spectroelectrochemical Comparative Study of Macrocyclic Thermally Activated Delayed Fluorescent Compounds: Molecular Charge Stability vs OLED EQE Roll‐Off. Asian Journal of Organic Chemistry, 9(12), 2153-2161. https://doi.org/10.1002/ajoc.202000475

In this work, we present how a small change in molecular structure can affect the electrochemical stability of organic compounds. A new electron donor–acceptor–donor–acceptor (D–A–D–A) macrocyclic π‐conjugated compound ( t BuMC ) comprising of dibenz... Read More about Electrochemical and Spectroelectrochemical Comparative Study of Macrocyclic Thermally Activated Delayed Fluorescent Compounds: Molecular Charge Stability vs OLED EQE Roll‐Off.

Thermally Activated Delayed Fluorescent Donor–Acceptor–Donor–Acceptor π-Conjugated Macrocycle for Organic Light-Emitting Diodes (2020)
Journal Article
Izumi, S., Higginbotham, H. F., Nyga, A., Stachelek, P., Tohnai, N., Silva, P. D., Data, P., Takeda, Y., & Minakata, S. (2020). Thermally Activated Delayed Fluorescent Donor–Acceptor–Donor–Acceptor π-Conjugated Macrocycle for Organic Light-Emitting Diodes. Journal of the American Chemical Society, 142(3), 1482-1491. https://doi.org/10.1021/jacs.9b11578

A new class of thermally activated delayed fluorescent donor–acceptor–donor–acceptor (D–A–D–A) π-conjugated macrocycle comprised of two U-shaped electron-acceptors (dibenzo[a,j]phenazine) and two electron-donors (N,N′-diphenyl-p-phenyelendiamine) has... Read More about Thermally Activated Delayed Fluorescent Donor–Acceptor–Donor–Acceptor π-Conjugated Macrocycle for Organic Light-Emitting Diodes.

Molecular Design Strategies for Color Tuning of Blue TADF Emitters (2019)
Journal Article
Stachelek, P., Ward, J. S., dos Santos, P. L., Danos, A., Colella, M., Haase, N., Raynes, S. J., Batsanov, A. S., Bryce, M. R., Monkman, A. P., & Brook, P. (2019). Molecular Design Strategies for Color Tuning of Blue TADF Emitters. ACS Applied Materials and Interfaces, 11(30), 27125-27133. https://doi.org/10.1021/acsami.9b06364

New thermally activated delayed fluorescence (TADF) blue emitter molecules based on the known donor−acceptor−donor (D−A−D)- type TADF molecule, 2,7-bis(9,9-dimethylacridin-10-yl)-9,9-dimethylthioxanthene- S,S-dioxide (DDMA-TXO2), are reported. The mo... Read More about Molecular Design Strategies for Color Tuning of Blue TADF Emitters.

Ultrafast Through-Space Electronic Energy Transfer in Molecular Dyads Built around Dynamic Spacer Units (2018)
Journal Article
Ziessel, R., Stachelek, P., Harriman, A., Hedley, G. J., Roland, T., Ruseckas, A., & Samuel, I. D. (2018). Ultrafast Through-Space Electronic Energy Transfer in Molecular Dyads Built around Dynamic Spacer Units. The Journal of Physical Chemistry A, 122(18), 4437-4447. https://doi.org/10.1021/acs.jpca.8b02415

A pair of complementary molecular dyads have been synthesized around a 1,2-diaminocyclohexyl spacer that itself undergoes ring inversion. Despite these conformational exchange processes, the donor and acceptor occupy quite restricted spatial regions,... Read More about Ultrafast Through-Space Electronic Energy Transfer in Molecular Dyads Built around Dynamic Spacer Units.

End-to-end communication in a linear supermolecule with a BOPHY centre and N,N-dimethylanilino-based terminals (2018)
Journal Article
Woodford, O. J., Stachelek, P., Ziessel, R., Algoazy, N., Knight, J. G., & Harriman, A. (2018). End-to-end communication in a linear supermolecule with a BOPHY centre and N,N-dimethylanilino-based terminals. New Journal of Chemistry, 42(7), https://doi.org/10.1039/c7nj04654e

The recently introduced BOPHY (i.e., symmetrical bis(pyrrole-BF2)) chromophore is a highly attractive building block for constructing linear molecules with extended π-conjugation running along the molecular backbone. In order to assess the level of e... Read More about End-to-end communication in a linear supermolecule with a BOPHY centre and N,N-dimethylanilino-based terminals.

Electronic Communication in Closely Connected BODIPY-Based Bichromophores (2016)
Journal Article
Stachelek, P., & Harriman, A. (2016). Electronic Communication in Closely Connected BODIPY-Based Bichromophores. The Journal of Physical Chemistry A, 120(41), 8104-8113. https://doi.org/10.1021/acs.jpca.6b08284

A small series of closely spaced, bichromophoric boron dipyrromethene (BODIPY) derivatives has been examined by optical spectroscopy and compared to the corresponding mononuclear dyes. The compounds vary according to the site of attachment and also b... Read More about Electronic Communication in Closely Connected BODIPY-Based Bichromophores.

Solvent-Driven Conformational Exchange for Amide-Linked Bichromophoric BODIPY Derivatives (2016)
Journal Article
Thakare, S., Stachelek, P., Mula, S., More, A. B., Chattopadhyay, S., Ray, A. K., Sekar, N., Ziessel, R., & Harriman, A. (2016). Solvent-Driven Conformational Exchange for Amide-Linked Bichromophoric BODIPY Derivatives. Chemistry - A European Journal, 22(40), 14356-14366. https://doi.org/10.1002/chem.201602354

The fluorescence lifetime and quantum yield are seen to depend in an unexpected manner on the nature of the solvent for a pair of tripartite molecules composed of two identical boron dipyrromethene (BODIPY) residues attached to a 1,10-phenanthroline... Read More about Solvent-Driven Conformational Exchange for Amide-Linked Bichromophoric BODIPY Derivatives.