Timothy Clark
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View article: Oxygen-Mediated Sequential Down-Conversion in Perylenediimides
Oxygen-Mediated Sequential Down-Conversion in Perylenediimides Open
Perylenediimides (PDIs) are among the best-known chromophores for optoelectronic applications. Their photophysics in oxygen-rich environments remains, however, underexplored. In this study, we investigate three different PDI derivatives us…
View article: Reversible gating of singlet fission by tuning the role of a charge-transfer state
Reversible gating of singlet fission by tuning the role of a charge-transfer state Open
Stimulus-responsive triplet excited states and multiexcitonic logic gates have garnered increasing interest. Singlet fission is an efficient multiple exciton generation process, in which one singlet converts into two triplets. Singlet fiss…
View article: Intramolecular Singlet Fission in Individual Graphene Nanoribbons─Competition with a Charge Transfer
Intramolecular Singlet Fission in Individual Graphene Nanoribbons─Competition with a Charge Transfer Open
Graphene nanoribbons (NRs) constitute a versatile platform for developing novel materials, where their structure governs their optical, electronic, and magnetic properties while also shaping their excited-state dynamics. Here, we investiga…
View article: Helically Chiral Mixed‐Valence Systems Comprising <i>N</i> ‐Heterotriangulenes: Stabilization of the Cationic Species by π‐Expansion
Helically Chiral Mixed‐Valence Systems Comprising <i>N</i> ‐Heterotriangulenes: Stabilization of the Cationic Species by π‐Expansion Open
We report the efficient stabilization of nitrogen‐centered radical cations in a dimeric N ‐heterotriangulene bridged by a rigid π‐conjugated [5]helicene backbone ( NTH ). The rigid scaffold exhibits helical chirality, allowing the enantiom…
View article: Helically Chiral Mixed‐Valence Systems Comprising <i>N</i> ‐Heterotriangulenes: Stabilization of the Cationic Species by π‐Expansion
Helically Chiral Mixed‐Valence Systems Comprising <i>N</i> ‐Heterotriangulenes: Stabilization of the Cationic Species by π‐Expansion Open
We report the efficient stabilization of nitrogen‐centered radical cations in a dimeric N ‐heterotriangulene bridged by a rigid π‐conjugated [5]helicene backbone ( NTH ). The rigid scaffold exhibits helical chirality, allowing the enantiom…
View article: Advancing the spatiotemporal dimension of wildlife–pollution interactions
Advancing the spatiotemporal dimension of wildlife–pollution interactions Open
Chemical pollution is a pervasive problem and is now considered the fastest-growing agent of global environmental change. Numerous pollutants are known to disrupt animal behaviour, alter ecological interactions, and shift evolutionary traj…
View article: Fused Hexabenzocoronene‐Porphyrin Conjugates with Tailorable Excited‐State Lifetimes
Fused Hexabenzocoronene‐Porphyrin Conjugates with Tailorable Excited‐State Lifetimes Open
A new clear‐cut strategy for fusing N‐heterocyclic and carbon‐pure systems is introduced en route to a versatile platform of multi‐purpose tetrapyrrolic chromophores. In particular, three novel C−C bond‐fused porphyrin‐hexabenzocoronene (H…
View article: Fused Hexabenzocoronene‐Porphyrin Conjugates with Tailorable Excited‐State Lifetimes
Fused Hexabenzocoronene‐Porphyrin Conjugates with Tailorable Excited‐State Lifetimes Open
A new clear‐cut strategy for fusing N‐heterocyclic and carbon‐pure systems is introduced en route to a versatile platform of multi‐purpose tetrapyrrolic chromophores. In particular, three novel C−C bond‐fused porphyrin‐hexabenzocoronene (H…
View article: Back Cover: Intramolecular Triplet Diffusion Facilitates Triplet Dissociation in a Pentacene Hexamer (Angew. Chem. Int. Ed. 8/2024)
Back Cover: Intramolecular Triplet Diffusion Facilitates Triplet Dissociation in a Pentacene Hexamer (Angew. Chem. Int. Ed. 8/2024) Open
Efficient free triplet generation via singlet fission remains elusive in most covalent systems. In their Research Article (e202315064), Rik R. Tykwinski, Dirk M. Guldi et al. present a hexameric pentacene system with strong inter-pentacene…
View article: Intramolecular Triplet Diffusion Facilitates Triplet Dissociation in a Pentacene Hexamer
Intramolecular Triplet Diffusion Facilitates Triplet Dissociation in a Pentacene Hexamer Open
Triplet dynamics in singlet fission depend strongly on the strength of the electronic coupling. Covalent systems in solution offer precise control over such couplings. Nonetheless, efficient free triplet generation remains elusive in most …
View article: CCDC 2013187: Experimental Crystal Structure Determination
CCDC 2013187: 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 2007705: Experimental Crystal Structure Determination
CCDC 2007705: 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 2213852: Experimental Crystal Structure Determination
CCDC 2213852: 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: Understanding the Visible Absorption of Electron Accepting and Donating CNDs (Small 31/2023)
Understanding the Visible Absorption of Electron Accepting and Donating CNDs (Small 31/2023) Open
Carbon Nanodots Carbon nanodots solvothermally synthesized from citric acid and formamide result in electron-rich properties upon in situ addition of NaOH, whereas otherwise electron-poor nanomaterial is obtained with reduced or oxidized c…
View article: Stereochemistry-Driven Interactions of α,γ-Peptide Ligands with the Neuropeptide Y Y<sub>4</sub>-Receptor
Stereochemistry-Driven Interactions of α,γ-Peptide Ligands with the Neuropeptide Y Y<sub>4</sub>-Receptor Open
The G-protein-coupled Y4-receptor (Y4R) and its endogenous ligand, pancreatic polypeptide (PP), suppress appetite in response to food intake and, thus, are attractive drug targets for body-weight control. The C-terminus of human PP (hPP), …
View article: Tetracene Dimers: A Platform for Intramolecular Down- and Up-conversion
Tetracene Dimers: A Platform for Intramolecular Down- and Up-conversion Open
Photon energy conversion can be accomplished in many different ways, including the two opposing manners, down-conversion (i.e., singlet fission, SF) and up-conversion (i.e., triplet-triplet annihilation up-conversion, TTA-UC). Both process…
View article: CCDC 2195755: Experimental Crystal Structure Determination
CCDC 2195755: 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 2195754: Experimental Crystal Structure Determination
CCDC 2195754: 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 2195753: Experimental Crystal Structure Determination
CCDC 2195753: 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: Understanding the Visible Absorption of Electron Accepting and Donating CNDs
Understanding the Visible Absorption of Electron Accepting and Donating CNDs Open
Carbon nanodots (CNDs) synthesized from citric acid and formyl derivatives, that is, formamide, urea, or N‐ methylformamide, stand out through their broad‐range visible‐light absorbance and extraordinary photostability. Despite their poten…
View article: Why do some fish grow faster than others?
Why do some fish grow faster than others? Open
All animals must acquire food to grow, but there is a vast diversity in how different species and even different individuals approach and achieve this task. Individuals within a species appear to fall along a bold-shy continuum, whereby so…
View article: Driving the quadricyclane-to-norbornadiene isomerization by charge separation with perylenediimide as electron acceptor
Driving the quadricyclane-to-norbornadiene isomerization by charge separation with perylenediimide as electron acceptor Open
The complementary use of time-resolved and steady-state spectroscopies has made it possible to describe the full reaction coordinate regarding the photoisomerization of NBDs featuring electron accepting PDIs.
View article: Two Rings Around One Ball: Stability and Charge Localization of [1 : 1] and [2 : 1] Complex Ions of [10]CPP and C<sub>60/70</sub><sup>[</sup>*<sup>]</sup>
Two Rings Around One Ball: Stability and Charge Localization of [1 : 1] and [2 : 1] Complex Ions of [10]CPP and C<sub>60/70</sub><sup>[</sup>*<sup>]</sup> Open
We investigate the gas‐phase chemistry of noncovalent complexes of [10]cycloparaphenylene ([10]CPP) with C 60 and C 70 by means of atmospheric pressure photoionization and electrospray ionization mass spectrometry. The literature‐known [1 …
View article: Oriented Thiophene‐Extended Benzotrithiophene Covalent Organic Framework Thin Films: Directional Electrical Conductivity (Adv. Funct. Mater. 47/2022)
Oriented Thiophene‐Extended Benzotrithiophene Covalent Organic Framework Thin Films: Directional Electrical Conductivity (Adv. Funct. Mater. 47/2022) Open
Covalent Organic Frameworks In article number 2205949, Dana Dina Medina, Ralf Thomas Weitz, Timothy Clark and co-workers describe the synthesis of covalent organic frameworks (COFs) based on a thiophene-extended benzotrithiophene (BTT) bui…
View article: Cell Maps for Artificial Intelligence (CM4AI) - FAIRSCAPE Portal Requirements
Cell Maps for Artificial Intelligence (CM4AI) - FAIRSCAPE Portal Requirements Open
This document describes requirements for a data access portal for data held in the Cell Maps for Artificial Intelligence (CM4AI) FAIRSCAPE instance. CM4AI is a Data Generation project in the NIH Bridge2AI program. The FAIRSCAPE CM4AI Data …
View article: CM4AI Data Dictionary Requirements
CM4AI Data Dictionary Requirements Open
This document presents requirements for a project-wide Data Dictionary (DD) to support FAIRness of data and software across the Cell Maps for Artificial Intelligence (CM4AI) project. This product will be the central tool for alignment, val…