All Outputs (84)

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.

A Chirally Locked Bis-perylene Diimide Macrocycle: Consequences for Chiral Self-Assembly and Circularly Polarized Luminescence (2024)
Journal Article
Penty, S. E., Orton, G. R., Black, D., Pal, R., Zwijnenburg, M. A., & Barendt, T. A. (2024). A Chirally Locked Bis-perylene Diimide Macrocycle: Consequences for Chiral Self-Assembly and Circularly Polarized Luminescence. Journal of the American Chemical Society, 146(8), 5470-5479. https://doi.org/10.1021/jacs.3c13191

Macrocycles containing chiral organic dyes are highly valuable for the development of supramolecular circularly polarized luminescent (CPL) materials, where a preorganized chiral framework is conducive to directing π–π self-assembly and delivering a... Read More about A Chirally Locked Bis-perylene Diimide Macrocycle: Consequences for Chiral Self-Assembly and Circularly Polarized Luminescence.

Unlocking same‐sign CPL: solvent effects on spectral form and racemisation kinetics in nine‐coordinate chiral europium(III) complexes (2023)
Journal Article
De Rosa, D. F., Starck, M., Parker, D., & Pal, R. (2023). Unlocking same‐sign CPL: solvent effects on spectral form and racemisation kinetics in nine‐coordinate chiral europium(III) complexes. Chemistry - A European Journal, https://doi.org/10.1002/chem.202303227

Understanding the factors that shape the circularly polarised luminescence (CPL) emission profiles of europium(III)-based CPL emitters to have specific sign properties, e. g. monosignate individual CPL transitions, is key to design novel complexes fo... Read More about Unlocking same‐sign CPL: solvent effects on spectral form and racemisation kinetics in nine‐coordinate chiral europium(III) complexes.

Distinguishing Molecular Mechanical Action from Photothermal and Photodynamic Behavior (2023)
Journal Article
Beckham, J. L., Bradford, T. S., Ayala-Orozco, C., Santos, A. L., Arnold, D., van Venrooy, A. R., …Tour, J. M. (2023). Distinguishing Molecular Mechanical Action from Photothermal and Photodynamic Behavior. Advanced Materials, https://doi.org/10.1002/adma.202306669

Molecular motors (MM) are molecular machines, or nanomachines, that rotate unidirectionally upon photostimulation and perform mechanical work on their environment. In the last several years, it has been shown that the photomechanical action of MM can... Read More about Distinguishing Molecular Mechanical Action from Photothermal and Photodynamic Behavior.

Two-Photon Circularly Polarized Luminescence of Chiral Eu Complexes (2023)
Journal Article
Willis, O. G., Petri, F., De Rosa, D. F., Mandoli, A., Pal, R., Zinna, F., & Di Bari, L. (2023). Two-Photon Circularly Polarized Luminescence of Chiral Eu Complexes. Journal of the American Chemical Society, 145(46), 25170-25176. https://doi.org/10.1021/jacs.3c05957

We report the synthesis of chiral lanthanide complexes with extended π conjugation for efficient circularly polarized luminescence (CPL) via two-photon excitation (2PE). The pyridine bis-oxazoline (PyBox) core provides the chiral Ln3+ environment, wh... Read More about Two-Photon Circularly Polarized Luminescence of Chiral Eu Complexes.

1‐Azathioxanthone Appended Lanthanide(III) DO3A Complexes That Luminesce Following Excitation at 405 nm** (2023)
Journal Article
Gundorff Nielsen, L., Ravnsborg Hansen, A. K., Stachelek, P., Pal, R., & Just Sørensen, T. (2023). 1‐Azathioxanthone Appended Lanthanide(III) DO3A Complexes That Luminesce Following Excitation at 405 nm**. European Journal of Inorganic Chemistry, 26(24), Article e202300245. https://doi.org/10.1002/ejic.202300245

Since the pioneering report by Selvin, we have been fascinated by the potential of using lanthanide luminescence in bioimaging. The uniquely narrow emission lines and long luminescence lifetimes both provide the potential for background free images t... Read More about 1‐Azathioxanthone Appended Lanthanide(III) DO3A Complexes That Luminesce Following Excitation at 405 nm**.

Influence of polyvinylpyrrolidone (PVP) in the synthesis of luminescent NaYF4:Yb,Er upconversion nanoparticles (2023)
Journal Article
Birch, R., Bruckbauer, J., Gajewska, M., Cios, G., Pal, R., & MacKenzie, L. E. (2023). Influence of polyvinylpyrrolidone (PVP) in the synthesis of luminescent NaYF4:Yb,Er upconversion nanoparticles. Methods and Applications in Fluorescence, 11(3), Article 034001. https://doi.org/10.1088/2050-6120/acd837

Polyvinylpyrrolidone (PVP) can be used to produce upconversion nanoparticles (UCNPs) in an advantageous manner, i.e. at modest temperatures in open-to-air conditions with simple hotplate and flask apparatus. However, the influence of PVP parameters o... Read More about Influence of polyvinylpyrrolidone (PVP) in the synthesis of luminescent NaYF4:Yb,Er upconversion nanoparticles.

Hierarchical self-assembly in an RNA-based coordination polymer hydrogel (2023)
Journal Article
El-Zubir, O., Rojas Martinez, P., Dura, G., Doherty, C., Cucinotta, F., Mackenzie, L. E., …Houlton, A. (2023). Hierarchical self-assembly in an RNA-based coordination polymer hydrogel. Dalton Transactions, 52(17), 5545-5551. https://doi.org/10.1039/d3dt00634d

An RNA-based coordination polymer is formed by the aqueous reaction of CuI ions with the thionucleoside enantiomer (−)6-thioguanosine, (6tGH). The resulting polymer, [CuI(μ3-S-thioG)]n1, has a one-dimensional structure based on a [Cu4–S4] core and un... Read More about Hierarchical self-assembly in an RNA-based coordination polymer hydrogel.

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.

Synthesis and Structural Diversification of Circularly Polarised Luminescence Active, Helically Chiral, “Confused” N,N,O,C‐BODIPYs** (2022)
Journal Article
Clarke, R. G., Weatherston, J., Taj‐Aldeen, R. A., Waddell, P. G., McFarlane, W., Penfold, T. J., …Hall, M. J. (2023). Synthesis and Structural Diversification of Circularly Polarised Luminescence Active, Helically Chiral, “Confused” N,N,O,C‐BODIPYs**. ChemPhotoChem, 7(1), Article e202200194. https://doi.org/10.1002/cptc.202200194

Helically chiral boron-chelated dipyrromethene (BODIPY) dyes are known to exhibit solution phase circularly polarized luminescence (CPL), but examples are limited to a few synthetically accessible molecular architectures. We report a B−N chelation, S... Read More about Synthesis and Structural Diversification of Circularly Polarised Luminescence Active, Helically Chiral, “Confused” N,N,O,C‐BODIPYs**.

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., …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., …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.

BINOL blocks as accessible triplet state modulators in BODIPY dyes (2022)
Journal Article
Jiménez, J., Prieto-Montero, R., Serrano, S., Stachelek, P., Rebollar, E., Maroto, B. L., …de la Moya, S. (2022). BINOL blocks as accessible triplet state modulators in BODIPY dyes. Chemical Communications, 58(44), 6385-6388. https://doi.org/10.1039/d2cc00991a

BINOL moieties of different electronic demand are useful blocks for enabling the photo-production and modulation of triplet excited states in readily-accesible BINOL-based O-BODIPY dyes from standard F-BODIPY precursors. The rapid and rational develo... Read More about BINOL blocks as accessible triplet state modulators in BODIPY dyes.

Circularly polarised luminescence in an RNA-based homochiral, self-repairing, coordination polymer hydrogel (2022)
Journal Article
El-Zubir, O., Martinez, P. R., Dura, G., Al-Mahamad, L. L., Pope, T., Penfold, T. J., …Houlton, A. (2022). Circularly polarised luminescence in an RNA-based homochiral, self-repairing, coordination polymer hydrogel. Journal of Materials Chemistry C Materials for optical and electronic devices, 10(18), https://doi.org/10.1039/d2tc00366j

The aqueous equimolar reaction of Ag(I) ions with the thionucleoside enantiomer (−)6-thioguanosine, ((−)6tGH), yields a one-dimensional coordination polymer {Ag(−)tG}n, the self-assembly of which generates left-handed helical chains. The resulting he... Read More about Circularly polarised luminescence in an RNA-based homochiral, self-repairing, coordination polymer hydrogel.

Lanthanide luminescence from supramolecular hydrogels consisting of bio-conjugated picolinic-acid-based guanosine quadruplexes (2022)
Journal Article
Kotova, O., O’Reilly, C., Barwich, S. T., Mackenzie, L. E., Lynes, A. D., Savyasachi, A. J., …Gunnlaugsson, T. (2022). Lanthanide luminescence from supramolecular hydrogels consisting of bio-conjugated picolinic-acid-based guanosine quadruplexes. Chem, https://doi.org/10.1016/j.chempr.2022.01.015

The formation of bio-inspired healable lanthanide luminescent hydrogels is detailed. These materials are composed of K(I)-stabilized guanosine quadruplexes (G4) that were bio-conjugated to mannose-derived picolinic acid ligand 1 using boric acid chem... Read More about Lanthanide luminescence from supramolecular hydrogels consisting of bio-conjugated picolinic-acid-based guanosine quadruplexes.

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.

Low-temperature open-air synthesis of PVP-coated NaYF4:Yb,Er,Mn upconversion nanoparticles with strong red emission (2022)
Journal Article
MacKenzie, L. E., Alvarez-Ruiz, D., & Pal, R. (2022). Low-temperature open-air synthesis of PVP-coated NaYF4:Yb,Er,Mn upconversion nanoparticles with strong red emission. Royal Society Open Science, 9(1), https://doi.org/10.1098/rsos.211508

Cubic (α-phase) NaYF4:Yb,Er upconversion nanoparticles (UCNPs) are uniquely suited to biophotonics and biosensing applications due to their near-infrared excitation and visible red emission (λex approx. 660 nm), enabling detection via thick overlying... Read More about Low-temperature open-air synthesis of PVP-coated NaYF4:Yb,Er,Mn upconversion nanoparticles with strong red emission.

Applying TADF Emitters in Bioimaging and Sensing—A Novel Approach Using Liposomes for Encapsulation and Cellular Uptake (2021)
Journal Article
Smith, P. O., Black, D. J., Pal, R., Avó, J., Dias, F. B., Linthwaite, V. L., …Pålsson, L. (2021). Applying TADF Emitters in Bioimaging and Sensing—A Novel Approach Using Liposomes for Encapsulation and Cellular Uptake. Frontiers in Chemistry, 9, Article 743928. https://doi.org/10.3389/fchem.2021.743928

A new method for facilitating the delivery, uptake and intracellular localisation of thermally activated delayed fluorescence (TADF) complexes was developed. First, confinement of TADF complexes in liposomes was demonstrated, which were subsequently... Read More about Applying TADF Emitters in Bioimaging and Sensing—A Novel Approach Using Liposomes for Encapsulation and Cellular Uptake.

Helicate-to-tetrahedron transformation of chiral lanthanide supramolecular complexes induced by ionic radii effect and linker length (2021)
Journal Article
Yim, K., Yeung, C., Probert, M. R., Chan, W. T. K., MacKenzie, L. E., Pal, R., …Law, G. (2021). Helicate-to-tetrahedron transformation of chiral lanthanide supramolecular complexes induced by ionic radii effect and linker length. Communications Chemistry, 4, Article 116. https://doi.org/10.1038/s42004-021-00553-8

Controlled formation of desired lanthanide supramolecular complexes is challenging because of the difficulties in predicting coordination geometry, as well as a labile coordination number. Herein, we explore the effect of ionic radii and linker lengt... Read More about Helicate-to-tetrahedron transformation of chiral lanthanide supramolecular complexes induced by ionic radii effect and linker length.

Striking solvent dependence of total emission and circularly polarised luminescence in coordinatively saturated chiral europium complexes: solvation significantly perturbs the ligand field (2021)
Journal Article
Fradgley, J. D., Frawley, A. T., Pal, R., & Parker, D. (2021). Striking solvent dependence of total emission and circularly polarised luminescence in coordinatively saturated chiral europium complexes: solvation significantly perturbs the ligand field. Physical Chemistry Chemical Physics, 23(19), 11479-11487. https://doi.org/10.1039/d1cp01686e

Examination of total emission and circularly polarised luminescence (CPL) spectra of three 9-coordinate Eu(III) complexes with well-defined speciation shows that the ligand fields of these C3 symmetric complexes are extremely sensitive to solvent pol... Read More about Striking solvent dependence of total emission and circularly polarised luminescence in coordinatively saturated chiral europium complexes: solvation significantly perturbs the ligand field.