Nicolaj Kofod
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View article: Yb2-Tb Upconversion in a Hetero-Trimetallic Molecular Lanthanide Complex
Yb2-Tb Upconversion in a Hetero-Trimetallic Molecular Lanthanide Complex Open
Photon Upconversion in molecular hetero-metallic lanthanide systems is challenged by the lack of chemical diversity displayed by the lanthanide ions. Here, we report the multi-photon photophysical properties of a series of molecular hetero…
View article: Step-Wise Changes in the Excited State Lifetime of [Eu(D2O)9]3+ and [Eu(DOTA)(D2O)]- as a Function of the Number of Inner-Sphere O-H Oscillators
Step-Wise Changes in the Excited State Lifetime of [Eu(D2O)9]3+ and [Eu(DOTA)(D2O)]- as a Function of the Number of Inner-Sphere O-H Oscillators Open
Lanthanide luminescence is dominated by quenching from high-energy oscillators in the chemical environment. The rate of non-radiative energy transfer to a single H2O molecule coordinated to a Eu3+ ion exceeds the usual rates of emission by…
View article: Synthesis and Properties of Fluorenone‐Containing Cycloparaphenylenes and Their Late‐Stage Transformation
Synthesis and Properties of Fluorenone‐Containing Cycloparaphenylenes and Their Late‐Stage Transformation Open
Cycloparaphenylenes (CPPs) are the smallest possible armchair carbon nanotubes, the properties of which strongly depend on their ring size. They can be further tuned by either peripheral functionalization or by replacing phenylene rings fo…
View article: Mapping the Distribution of Electronic States within the 5D4 and 7F6 Levels of Tb3+ Complexes with Optical Spectroscopy
Mapping the Distribution of Electronic States within the 5D4 and 7F6 Levels of Tb3+ Complexes with Optical Spectroscopy Open
The Tb(III) ion has the most intense luminescence of the trivalent lanthanide(III) ions. In contrast to Eu(III), where the two levels only include a single state, the high number of electronic states in the ground (7F6) and emitting (5D4) …
View article: Rücktitelbild: Electronic Materials: An Antiaromatic Propeller Made from the Four‐Fold Fusion of Tetraoxa[8]circulene and Perylene Diimides (Angew. Chem. 48/2022)
Rücktitelbild: Electronic Materials: An Antiaromatic Propeller Made from the Four‐Fold Fusion of Tetraoxa[8]circulene and Perylene Diimides (Angew. Chem. 48/2022) Open
Ein antiaromatischer molekularer Propeller wirkt als starker Elektronenakzeptor, Fluorophor und Farbstoff in Bulk-Heterojunction-Solarzellen. In ihrem Forschungsartikel (e202212293) berichten Glib V. Baryshnikov, Colin Nuckolls, Michael Pi…
View article: Back Cover: Electronic Materials: An Antiaromatic Propeller Made from the Four‐Fold Fusion of Tetraoxa[8]circulene and Perylene Diimides (Angew. Chem. Int. Ed. 48/2022)
Back Cover: Electronic Materials: An Antiaromatic Propeller Made from the Four‐Fold Fusion of Tetraoxa[8]circulene and Perylene Diimides (Angew. Chem. Int. Ed. 48/2022) Open
An antiaromatic molecular propeller acts as a strong electron acceptor, fluorophore, and dye in bulk heterojunction solar cells. In their Research Article (e202212293), Glib V. Baryshnikov, Colin Nuckolls, Michael Pittelkow, and co-workers…
View article: Tb3+ Photophysics: Mapping the radiative and non-radiative transition probabilities of [Tb(H2O)9]3+ using molecular photophysics
Tb3+ Photophysics: Mapping the radiative and non-radiative transition probabilities of [Tb(H2O)9]3+ using molecular photophysics Open
The study of optical transitions in lanthanides has evolved separately from molecular photophysics. However, the forbidden transitions can be accurately described using the framework developed in molecular photophysics. In this study, a de…
View article: Electronic Materials: An Antiaromatic Propeller Made from the Four‐Fold Fusion of Tetraoxa[8]circulene and Perylene Diimides
Electronic Materials: An Antiaromatic Propeller Made from the Four‐Fold Fusion of Tetraoxa[8]circulene and Perylene Diimides Open
The synthesis of an antiaromatic tetraoxa[8]circulene annulated with four perylene diimides (PDI), giving a dynamic non‐planar π‐conjugated system, is described. The molecule contains 32 aromatic rings surrounding one formally antiaromatic…
View article: Electronic Materials: An Antiaromatic Propeller Made from the Four‐Fold Fusion of Tetraoxa[8]circulene and Perylene Diimides
Electronic Materials: An Antiaromatic Propeller Made from the Four‐Fold Fusion of Tetraoxa[8]circulene and Perylene Diimides Open
The synthesis of an antiaromatic tetraoxa[8]circulene annulated with four perylene diimides (PDI), giving a dynamic non‐planar π‐conjugated system, is described. The molecule contains 32 aromatic rings surrounding one formally antiaromatic…
View article: Seven Europium(III) Complexes in Solution – The Importance of Reporting Data When Investigating Luminescence Spectra and Electronic Structure
Seven Europium(III) Complexes in Solution – The Importance of Reporting Data When Investigating Luminescence Spectra and Electronic Structure Open
Despite significant effort, the complexity of europium(III) luminescence in general – and sample composition in particular – has precluded the publication of standard spectra of specific complexes in aqueous solution. Further, low spectral…
View article: Revisiting the Assignment of Innocent and Non-Innocent Counter ions in Lanthanide(III) Solution Chemistry
Revisiting the Assignment of Innocent and Non-Innocent Counter ions in Lanthanide(III) Solution Chemistry Open
Lanthanides are found in critical applications from display technology to renewable energy. Often these rare earth elements are used as alloys or functional materials, yet the access to them are trough solution processes. In aqueous soluti…
View article: Arel – Investigating [Eu(H2O)9]3+ photophysics and creating a method to by-pass luminescence quantum yield determinations
Arel – Investigating [Eu(H2O)9]3+ photophysics and creating a method to by-pass luminescence quantum yield determinations Open
Lanthanide luminescence has been treated separate from molecular photophysics, although the underlying phenomena are the same. As the optical transitions observed in the trivalent lanthanide ions are forbidden, they do belong to the group …
View article: The Temperature Dependence of Fundamental Photophysical Properties of [Eu(MeOH-d4)9]3+ Solvates and [Eu.DOTA(MeOH-d4)]- Complexes
The Temperature Dependence of Fundamental Photophysical Properties of [Eu(MeOH-d4)9]3+ Solvates and [Eu.DOTA(MeOH-d4)]- Complexes Open
The trivalent lanthanide ions show optical transitions between energy levels within the 4f shell. All these transitions are formally forbidden according to the quantum mechanical selection rules used in molecular photophysics. Nevertheless…
View article: Electronic Structure of Ytterbium(III) Solvates – A Combined Spectro-scopic and Theoretical Study
Electronic Structure of Ytterbium(III) Solvates – A Combined Spectro-scopic and Theoretical Study Open
The wide range of optical and magnetic properties of the lanthanide(III) ions is associated to their intricate electronic structures, which in contrast to lighter elements is characterized by strong relativistic effects and spin-orbit coup…
View article: The Temperature Dependence of Fundamental Photophysical Properties of [Eu(MeOH-d4)9]3+ Solvates and [Eu.DOTA(MeOH-d4)]- Complexes
The Temperature Dependence of Fundamental Photophysical Properties of [Eu(MeOH-d4)9]3+ Solvates and [Eu.DOTA(MeOH-d4)]- Complexes Open
The trivalent lanthanide ions show optical transitions between energy levels within the 4f shell. All these transitions are formally forbidden according to the quantum mechanical selection rules used in molecular photophysics. Nevertheless…
View article: The Temperature Dependence of Fundamental Photophysical Properties of [Eu(MeOH-d4)9]3+ Solvates and [Eu.DOTA(MeOH-d4)]- Complexes
The Temperature Dependence of Fundamental Photophysical Properties of [Eu(MeOH-d4)9]3+ Solvates and [Eu.DOTA(MeOH-d4)]- Complexes Open
The trivalent lanthanide ions show optical transitions between energy levels within the 4f shell. All these transitions are formally forbidden according to the quantum mechanical selection rules used in molecular photophysics. Nevertheless…
View article: The Temperature Dependence of Fundamental Photophysical Properties of [Eu(MeOH-d4)9]3+ Solvates and [Eu.DOTA(MeOH-d4)]- Complexes
The Temperature Dependence of Fundamental Photophysical Properties of [Eu(MeOH-d4)9]3+ Solvates and [Eu.DOTA(MeOH-d4)]- Complexes Open
The trivalent lanthanide ions show optical transitions between energy levels within the 4f shell. All these transitions are formally forbidden according to the quantum mechanical selection rules used in molecular photophysics. Nevertheless…
View article: Electronic Structure of Ytterbium(III) Solvates – A Combined Spectro-scopic and Theoretical Study
Electronic Structure of Ytterbium(III) Solvates – A Combined Spectro-scopic and Theoretical Study Open
The wide range of optical and magnetic properties of the lanthanide(III) ions is associated to their intricate electronic structures, which in contrast to lighter elements is characterized by strong relativistic effects and spin-orbit coup…
View article: Electronic Structure of Ytterbium(III) Solvates – A Combined Spectro-scopic and Theoretical Study
Electronic Structure of Ytterbium(III) Solvates – A Combined Spectro-scopic and Theoretical Study Open
The wide range of optical and magnetic properties of the lanthanide(III) ions is associated to their intricate electronic structures, which in contrast to lighter elements is characterized by strong relativistic effects and spin-orbit coup…
View article: The effect of weighted averages when determining the speciation and structure–property relationships of europium(<scp>iii</scp>) dipicolinate complexes
The effect of weighted averages when determining the speciation and structure–property relationships of europium(<span>iii</span>) dipicolinate complexes Open
Europium(iii) dipicolinate complexes have been a model system in lanthanide solution chemistry for decades, here it is investigated in unprecedented detail.
View article: Front Cover: π‐Expanded Thioxanthones – Engineering the Triplet Level of Thioxanthone Sensitizers for Lanthanide‐Based Luminescent Probes with Visible Excitation (ChemPlusChem 12/2019)
Front Cover: π‐Expanded Thioxanthones – Engineering the Triplet Level of Thioxanthone Sensitizers for Lanthanide‐Based Luminescent Probes with Visible Excitation (ChemPlusChem 12/2019) Open
The front cover shows the clouds parting for a cell imaged using predominantly mitochondrial-selective staining with a thioxanthone-appended europium(III) complex. Lanthanide luminescence can therefore be used in optical bioimaging by exci…
View article: π‐Expanded Thioxanthones – Engineering the Triplet Level of Thioxanthone Sensitizers for Lanthanide‐Based Luminescent Probes with Visible Excitation
π‐Expanded Thioxanthones – Engineering the Triplet Level of Thioxanthone Sensitizers for Lanthanide‐Based Luminescent Probes with Visible Excitation Open
Bright lanthanide based probes for optical bioimaging must rely on the antenna principle, where the lanthanide‐centred excited state is formed by a complex sensitization process. Efficient sensitization of lanthanide‐centred emission occur…