Robert Pal
Durham
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Articles by Robert Pal
Two-photon excited circularly polarized luminescence of hetero[9]helicene with multiresonant thermally activated delayed fluorescence
Abstract Circularly polarized luminescence (CPL) imaging of biomolecules using designed chiral probes holds significant promise for biochemical and analytical applications.
Investigating the CPL-Structure Dependence in Arylalkynylpyridyl—Triazacyclononane Sensitized Nine-Coordinate Europium(III) Complexes
1 Introduction Arylalkynylpyridyl—triazacyclononane sensitized macrocyclic quasi-C3 symmetric europium(III) complexes (EuL) have been long known for their outstanding brightness, low toxicity, and large pseudo-Stokes shift, which are advantageous for bioimaging application. Their structure comprises a 1,4,7-triazacyclononane (TACN)—based macrocyclic ligand (L) with three light absorbing chromophores that facilitate sensitization of the emissive europium(III) center (Figure 1).
Tuning Circular Dichroism and Circularly Polarised Luminescence in Single Crystals of a Perylene Diimide Macrocycle
Introduction Chiral materials possessing circular dichroism (CD) and circularly polarised luminescence (CPL) are of increasing importance for advanced optoelectronics, sensing and computing.[1-3] In this context, organic materials[4] provide a number of potential benefits including synthetic tuneability,[5] solution processability[6] and biocompatibility.[7] A key performance metric for chiroptical materials is their dissymmetry factor, g,[8] which quantifies the degree of circularly...
Autoclave reactor synthesis of upconversion nanoparticles, unreported variables, and safety considerations - Communications Chemistry
Abstract Autoclave reactors are widely used across chemical and biological sciences, including for the synthesis of upconversion nanoparticles (UCNPs) and other nanomaterials. Yet, the details of how autoclave reactors are used in such synthesis are rarely reported in the literature, leaving several key synthesis variables widely unreported and thereby hampering experimental reproducibility.
A Bis‐Perylene Diimide Macrocycle Chiroptical Switch
Introduction Chiral organic materials are under investigation for advancing the fields of chiral recognition,1 separation,2 and catalysis,3 while those containing organic chromophores4 unlock applications in chiroptical sensing,5 chiral optoelectronics,6 and spintronics.7 Among these materials, supramolecular assemblies are of great interest8 due to strong chiroptical properties arising from the amplification of chirality.9 These chiroptical properties include the absorption or emission of...
Unlocking same‐sign CPL: solvent effects on spectral form and racemisation kinetics in nine‐coordinate chiral europium(III) complexes
Supporting Information As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors.
A Chirally Locked Bis-perylene Diimide Macrocycle: Consequences for Chiral Self-Assembly and Circularly Polarized Luminescence
Download Hi-Res ImageDownload to MS-PowerPointCite This:J. Am. Chem. Soc. 2024, XXXX, XXX RETURN TO ARTICLES ASAPPREVArticleNEXT , , Dominic J. Black Department of Chemistry, University of Durham, South Road, Durham DH1 3LE, U.K. , * , , and * Cite this: J. Am. Chem. Soc. 2024, XXXX, XXX .
A Chirally Locked Bis-perylene Diimide Macrocycle: Consequences for Chiral Self-Assembly and Circularly Polarized Luminescence
Download Hi-Res ImageDownload to MS-PowerPointCite This:J. Am. Chem. Soc. 2024, XXXX, XXX RETURN TO ARTICLES ASAPPREVArticleNEXT , , Dominic J. Black Department of Chemistry, University of Durham, South Road, Durham DH1 3LE, U.K. , * , , and * Cite this: J. Am. Chem. Soc. 2024, XXXX, XXX .
What Do Cross-Range Germination, Growth, and Interaction Studies Reveal about the Behaviour of an Expansive Plant Species?
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1‐Azathioxanthone Appended Lanthanide(III) DO3A Complexes That Luminesce Following Excitation at 405 nm**
Graphical Abstract Lanthanide luminescence can attain significant brightness in antenna chromophore appended complexes, but how bright can it be? And is it enough for conventional bioimaging? In this study we explore both photophysics and bioimaging of three antenna appended lanthanide complexes. Abstract Since the pioneering report by Selvin, we have been fascinated by the potential of using lanthanide luminescence in bioimaging.
Two-Photon Circularly Polarized Luminescence of Chiral Eu Complexes
Download Hi-Res ImageDownload to MS-PowerPointCite This:J. Am. Chem. Soc. 2023, XXXX, XXX Oliver G. Willis Department of Chemistry and Industrial Chemistry, University of Pisa, via Moruzzi, 13, 56124 Pisa, Italy , Filippo Petri Department of Chemistry and Industrial Chemistry, University of Pisa, via Moruzzi, 13, 56124 Pisa, Italy , Davide F.
Rapid handheld time-resolved circularly polarised luminescence photography camera for life and material sciences - Nature Communications
Abstract 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 through a renaissance, especially the design and synthesis of CPL active luminescent lanthanide complexes owing to their unique and robust photophysical properties.
Low-temperature open-air synthesis of PVP-coated NaYF4:Yb,Er,Mn upconversion nanoparticles with strong red emission
1. Introduction Upconversion nanoparticles (UCNPs) are uniquely suited for biophotonics and biosensing applications due to their unique low-energy near-infrared (NIR) excitation (λex ∼ 980 nm) and visible emission (anti-Stokes' shift) at well-defined narrow wavebands.
A Deceptively Simple System for Getting More Done with ADHD
It doesn’t make sense. I’ve built a successful life and business, yet at times I find it overwhelming to the point of tortuous getting simple things done. The wiring of my ADHD brain allows me to accomplish complex tasks under stressful situations, yet the simple act of sending out an email can inspire procrastination for days, even weeks. Some emails just never get sent. Over the years, I’ve come to accept that logic is not a factor here. It is what it is.
Time-resolved luminescence detection of peroxynitrite using a reactivity-based lanthanide probe
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Excitation modulation of Eu:BPEPC based complexes as low-energy reference standards for circularly polarised luminescence (CPL).
Excitation modulation of Eu:BPEPC based complexes as low-energy reference standards for circularly polarised luminescence (CPL). The enantiomers of [EuL3].3Cl, an analogue of Eu:BPEPC with a lowered energy excitation wavelength, serve as effective reference complexes for the calibration of circularly polarised luminescence (CPL) spectrometers. You have access to this article Please wait while we load your content... Something went wrong. Try again?
How to Respond When a Loved One Is Diagnosed with ADHD
1 of 13 How to Respond There is no right or wrong way to react to an ADHD diagnosis for yourself or your child. Sadness. Relief. Anger. These are all natural — and often overlapping — emotions experienced by the newly diagnosed, and those who care about them.
Selective Signaling of Glyphosate in Water Using Europium Luminescence
A series of four emissive europium complexes has been evaluated for the binding of glyphosate in various aqueous media, including river water and grain extracts. Binding selectivity toward inorganic phosphate and bicarbonate was enhanced by measuring samples at pH 5.9, above the pKa of glyphosate itself.
Your Strengths Inventory: Repairing Self-Esteem After an ADHD Diagnosis
An ADDitude reader recently wrote to me, “I was diagnosed with ADHD at 45 years old. I struggled with my ADHD through adolescence, and didn’t understand what was wrong with me. I had to take lots of mental tests in grade school, only to determine that I was higher functioning and ‘normal.’ My parents did not know that I had ADHD, and they struggled along with me. They punished me when I acted up or seemed defiant. This left me with mental scars and low self-esteem. I lack confidence.
Enantioselective cellular localisation of europium(III) coordination complexes
The selective mitochondrial localisation of the ? enantiomer of three different emissive europium(III) complexes in NIH 3T3 and MCF7 cells contrasts with the behaviour of the ? enantiomer, for which a predominant lysosomal localisation was observed by confocal microscopy. In each case, cell uptake occurs via macropinocytosis.
Enantioselective cellular localisation of europium(III) coordination complexes
The selective mitochondrial localisation of the ? enantiomer of three different emissive europium(III) complexes in NIH 3T3 and MCF7 cells contrasts with the behaviour of the ? enantiomer, for which a predominant lysosomal localisation was observed by confocal microscopy. In each case, cell uptake occurs via macropinocytosis.
Selectively switching on europium emission in drug site one of human serum albumin
D. Parker, R. Pal and S. Shuvaev, Chem. Commun., 2017, Accepted Manuscript , DOI: 10.1039/C7CC03071A If you are not the author of this article and you wish to reproduce material from it in a third party non-RSC publication you must formally request permission using RightsLink. Go to our Instructions for using RightsLink page for details.
Very Bright, Enantiopure Europium(III) Complexes Allow Time-Gated Chiral Contrast Imaging
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Induced europium CPL for the selective signalling of phosphorylated amino-acids and O-phosphorylated hexapeptides
Two bright, europium (III) complexes based on an achiral heptadentate triazacyclononane ligand bearing two strongly absorbing chromophores have been evaluated for the selective emission and CPL signalling of various chiral O-phosphono-anions. Binding of O-phosphono-Ser and Thr gives rise to a strong induced CPL signature and a favoured Δ complex configuration is adopted.
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