Annie K. Powell
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View article: Stability and Ultrafast Dynamics of Luminescent Biquinoxen-Bis-σH-Adducts
Stability and Ultrafast Dynamics of Luminescent Biquinoxen-Bis-σH-Adducts Open
We report the synthesis of two new biquinoxen-σH-adducts (3,3′-diisopropoxy-4,4′-dimethyl-3,3′,4,4′-tetrahydro-2,2′-biquinoxaline (Mbqn-(OiPr)2) (1) and 3,3′-bis(isopropylthio)-4,4′-dimethyl-3,3′,4,4′-tetrahydro-2,2′-biquinoxaline (Mbqn-(S…
View article: Multiplexed Fluorescent Microarrays on MIL‐101(Cr) Thin Films as Luminescent Probes for pH and Disease‐Associated Molecules
Multiplexed Fluorescent Microarrays on MIL‐101(Cr) Thin Films as Luminescent Probes for pH and Disease‐Associated Molecules Open
Recently, metal‐organic frameworks (MOFs) have shown high potential in the field of sensing. However, fluorescent‐based detection with MOFs in solution needs complex pre‐treatments and has stability issues, complicating measurements and ha…
View article: Giant Molecular Toroidal Moment Amenable to Direct Observation in a Fe$_{10}$Dy$_{10}$ Ring
Giant Molecular Toroidal Moment Amenable to Direct Observation in a Fe$_{10}$Dy$_{10}$ Ring Open
In single molecule toroics (SMTs) atomic spins and orbital currents generate magnetic vortices known as toroidal moments $\boldsymbolτ$, endowed with both magnetic and electric dipole symmetries, which can enable spin control via magnetoel…
View article: Adding Time-Domain 161Dy Mössbauer to the Mix: a Multitechnique Investigation of Magnetic Transitions in a {CoIII3DyIII3} Cluster with a Toroidal Moment
Adding Time-Domain 161Dy Mössbauer to the Mix: a Multitechnique Investigation of Magnetic Transitions in a {CoIII3DyIII3} Cluster with a Toroidal Moment Open
The coordination cluster [CoIII3DyIII3(µ3-OH)4(O2C-C6H4-p-Me)6(pmide)3(H2O)3]Cl2∙10MeCN (1) (where H2pmide = N-2-pyridylmethyldiethanolamine) crystallizes on a threefold site in the trigonal space group P3c1. The cluster core contains one …
View article: The Interplay of Single Ion Anisotropy and Magnetic 3 <i>d</i>‐4 <i>f</i> Interactions in V<sup>III</sup><sub>2</sub>Ln<sup>III</sup><sub>2</sub> Butterfly Complexes
The Interplay of Single Ion Anisotropy and Magnetic 3 <i>d</i>‐4 <i>f</i> Interactions in V<sup>III</sup><sub>2</sub>Ln<sup>III</sup><sub>2</sub> Butterfly Complexes Open
Within the framework of 3 d –4 f molecular magnets, the most thoroughly investigated architecture is that of butterfly‐shaped coordination clusters as it provides an ideal testbed to study fundamental magnetic interactions. Here, we report…
View article: Transferability of Ligand Field Parameters in a Family of 3d-4f M<sub>2</sub>Ln<sub>2</sub> Butterfly Single-Molecule Magnets
Transferability of Ligand Field Parameters in a Family of 3d-4f M<sub>2</sub>Ln<sub>2</sub> Butterfly Single-Molecule Magnets Open
Lanthanide-based single-molecule magnets are attractive candidates for applications in quantum information processing or data storage. The low symmetry ligand field environment often encountered in these complexes, combined with a sparsity…
View article: Unexpected stability of the iron(II) complex by an asymmetrical Schiff base from Fe(III): structure, magnetic and Mössbauer investigations
Unexpected stability of the iron(II) complex by an asymmetrical Schiff base from Fe(III): structure, magnetic and Mössbauer investigations Open
The asymmetric Schiff base prepared in situ from ethylenediamine and pyridine-2-carboxaldehyde reacts with Fe(ClO 4 ) 3 ·6H 2 O to form the Fe(II) complex [FeL 2 ](ClO 4 ) 2 with L = N , N -diethyl- N ′-(pyridin-2-yl)methylene)ethane-1,2-d…
View article: The effect of Bisphenol A vs Bisphenol F on the performance of polysulfone membranes
The effect of Bisphenol A vs Bisphenol F on the performance of polysulfone membranes Open
Microfiltration is widely used in water filtration to remove large particles, suspended solids, and bacteria. This study explores the properties and performance of polysulfone membranes synthesized with Bisphenol A (pBPA)...
View article: Single-Molecule Magnet Behavior and Spin Structure of an Fe<sup>III</sup><sub>7</sub> Cartwheel Cluster Revealed by Sub-Kelvin Magnetometry and Mössbauer Spectroscopy: The Final Pieces of the Puzzle
Single-Molecule Magnet Behavior and Spin Structure of an Fe<sup>III</sup><sub>7</sub> Cartwheel Cluster Revealed by Sub-Kelvin Magnetometry and Mössbauer Spectroscopy: The Final Pieces of the Puzzle Open
The spin frustration and other magnetic properties of the "cartwheel" heptanuclear cluster [FeIII7O3(O2CtBu)9(Me-dea)3(H2O)3] (Me-deaH2 = N-methyldiethanolamine) have been previously investigated; we present here a Mössbauer spectroscopic …
View article: Longitudinal and Transverse 1H Nuclear Magnetic Resonance Relaxivities of Lanthanide Ions in Aqueous Solution up to 1.4 GHz/33 T
Longitudinal and Transverse 1H Nuclear Magnetic Resonance Relaxivities of Lanthanide Ions in Aqueous Solution up to 1.4 GHz/33 T Open
The longitudinal and transverse nuclear magnetic resonance relaxivity dispersion (NMRD) of 1H in water induced by the paramagnetic relaxation enhancement (PRE) of dissolved lanthanide ions (Ln3+) can become very strong. Longitudinal and tr…
View article: Dinuclear Dysprosium Compounds: The Importance of Rigid Bridges
Dinuclear Dysprosium Compounds: The Importance of Rigid Bridges Open
We report the synthesis, structures and magnetic behaviour of two isostructural dinuclear Dy 3+ complexes where the metal ions of a previously reported monomeric building block are connected by a peroxide (O 2 2− ) or a pair of fluoride (2…
View article: Cover Feature: Gaining Insights into the Interplay between Optical and Magnetic Properties in Photoexcited Coordination Compounds (Chem. Eur. J. 43/2024)
Cover Feature: Gaining Insights into the Interplay between Optical and Magnetic Properties in Photoexcited Coordination Compounds (Chem. Eur. J. 43/2024) Open
The Cover Feature depicts the interaction of laser light (here, a red laser) with single-molecule magnets (here, a Fe10Ln10 ring) which can show altered magnetic behaviour after photoexcitation (as suggested by the perpendicular magnetic f…
View article: Self‐Assembly of four Ni<sub>16</sub> Molecular Wheels with Capsule and Tubular Supramolecular Architectures
Self‐Assembly of four Ni<sub>16</sub> Molecular Wheels with Capsule and Tubular Supramolecular Architectures Open
Four new Ni 16 molecular wheels with the general formula [ L 4 Ni 16 (RCOO) 16 (H 2 O) x (MeOH) 12‐x ] (where H 4 L =1,4‐bis(( E )‐((2’‐hydroxybenzyl)imino)methyl)‐2,3‐naphthalenediol, and R=H or Me) have been isolated and structurally cha…
View article: Mononuclear Fe(III) Schiff Base Complex with Trans-FeO4N2 Chromophore of o-Aminophenol Origin: Synthesis, Characterisation, Crystal Structure, and Spin State Investigation
Mononuclear Fe(III) Schiff Base Complex with Trans-FeO4N2 Chromophore of o-Aminophenol Origin: Synthesis, Characterisation, Crystal Structure, and Spin State Investigation Open
A new iron(III) complex (Et3NH)2[Fe(L)2](ClO4)·MeOH (1) where H2L = 2-{(E)-[2-hydroxyphenyl)imino]methyl}phenol has been synthesised and characterised by single crystal XRD, elemental analysis and DC magnetic susceptibility measurements. T…
View article: Gaining Insights into the Interplay between Optical and Magnetic Properties in Photoexcited Coordination Compounds
Gaining Insights into the Interplay between Optical and Magnetic Properties in Photoexcited Coordination Compounds Open
We describe early and recent advances in the fascinating field of combined magnetic and optical properties of inorganic coordination compounds and in particular of 3d–4f single molecule magnets. We cover various applied techniques which al…
View article: Vibrational properties of a mononuclear dysprosium containing singlemolecule magnet
Vibrational properties of a mononuclear dysprosium containing singlemolecule magnet Open
Dysprosium(III)-containing single-molecule magnets (SMMs) show blocking of the molecular magnetization and hysteresis effects in one molecule. They belong to the class of the best performing SMMs at present. Here, we present first results …
View article: Patterned immobilization of polyoxometalate-loaded mesoporous silica particles via amine-ene Michael additions on alkene functionalized surfaces
Patterned immobilization of polyoxometalate-loaded mesoporous silica particles via amine-ene Michael additions on alkene functionalized surfaces Open
Polyoxometalates (POM) are anionic oxoclusters of early transition metals that are of great interest for a variety of applications, including the development of sensors and catalysts. A crucial step in the use of POM in functional material…
View article: CCDC 2306455: Experimental Crystal Structure Determination
CCDC 2306455: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: An Effectively Uncoupled Gd8 Cluster Formed through Fixation of Atmospheric CO2 Showing Excellent Magnetocaloric Properties
An Effectively Uncoupled Gd8 Cluster Formed through Fixation of Atmospheric CO2 Showing Excellent Magnetocaloric Properties Open
The [Gd8(opch)8(CO3)4(H2O)8]·4H2O·10MeCN coordination cluster (1) crystallises in P1¯. The Gd8 core is held together by four bridging carbonates derived from atmospheric CO2 as well as the carboxyhydrazonyl oxygens of the 2-hydroxy-3-metho…
View article: A nested spin structure and single molecule magnet behaviour in an Fe<sub>8</sub>Dy<sub>12</sub> heterometallic cyclic coordination cluster
A nested spin structure and single molecule magnet behaviour in an Fe<sub>8</sub>Dy<sub>12</sub> heterometallic cyclic coordination cluster Open
The evaluation of the magnetic hysteresis of a saddle-shaped Fe 8 Dy 12 cyclic coordination cluster (CCC) using MAGELLAN reveals three sets of Dy III anisotropy axes.
View article: CCDC 2281618: Experimental Crystal Structure Determination
CCDC 2281618: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2281616: Experimental Crystal Structure Determination
CCDC 2281616: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2281620: Experimental Crystal Structure Determination
CCDC 2281620: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2281329: Experimental Crystal Structure Determination
CCDC 2281329: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2281617: Experimental Crystal Structure Determination
CCDC 2281617: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2281619: Experimental Crystal Structure Determination
CCDC 2281619: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2281615: Experimental Crystal Structure Determination
CCDC 2281615: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: LnDOTA puppeteering: removing the water molecule and imposing tetragonal symmetry
LnDOTA puppeteering: removing the water molecule and imposing tetragonal symmetry Open
Ionic strength and solid state packing effects have been used to remove the coordinated water molecule from the LnDOTA complexes, allowing to understand the magnetic anisotropy and single molecule magnet properties of these complexes.