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25 results for “Iridium”
IrCytoToxDB: a dataset of iridium(III) complexes cytotoxicities against various cell lines
<h1><strong>If you use this dataset, please cite our paper</strong>: <a href="https://doi.org/10.1038/s41597-024-03735-w">https://doi.org/10.1038/s41597-024-03735-w</a></h1> <p>IrCytoToxDB contains 4546 experimentally measured cytotoxicity values of 1295 unique iridium(III) complexes against 177 different cell lines reported in the 389 literature papers from 2008 to 2025.</p> <p>The 15 columns of this dataset are explained as follows:</p> <ol> <li>L1 — SMILES representation of the L1 ligand attached to the iridium ion</li> <li>L2 — SMILES representation of the L2 ligand attached to the iridium ion</li> <li>L3 — SMILES representation of the L3 ligand attached to the iridium ion</li> <li>L4 — SMILES representation of the L4 ligand attached to the iridium ion</li> <li>Counterion — SMILES representation of the counterion (if the complex molecule is charged)</li> <li>Abbreviation_in_the_article — the original abbreviation depicting the complex in the article</li> <li>IC50Dark(M*10^-6) — value of IC<sub>50</sub> originally presented in the article</li> <li>IC50Dark_standard_error(M*10^-6) — standard error of IC<sub>50</sub> originally presented in the article</li> <li>IC50Light(M*10^-6) — value of IC<sub>50</sub> under irradiation originally presented in the article</li> <li>IC50Light_standard_error(M*10^-6) — standard error of IC<sub>50 </sub>under irradiation originally presented in the article</li> <li>Excitation_Wavelength(nm) — excitation wavelength related to IC50Light values</li> <li>Irradiation_Time(minutes) — irradiation time related to IC50Light values</li> <li>Irradiation_Power(W*m^-2) — power of light source related to IC50Light values</li> <li>Cell_line — cell line (HeLa, A549, etc.)</li> <li>Time(h) — time of exposure of the complexes to the cell line</li> <li>DOI — doi of a data source for given values</li> <li>Year — year of a data source for given values </li> <li>Comments — additional comments regarding the data</li> </ol> <p>Additional remarks:</p> <ul> <li>The array of iridium(III) complexes could be formally mainly in two parts – <em>bis</em>-cyclometalated Ir(III) complexes and half-sandwich Ir(III) complexes. The former usually contain two cyclometalated ligands and one or two ancillary (or third cyclometalated) ligand; for these L1 and L2 correspond to the cyclometalated ligands and L3 (or L3 and L4) corresponds to the ancillary ligand. The latter usually contain one cyclopentadiene<sup>-</sup>(Cp<sup>-</sup>)-based ligand, one bidentate ligand and one monodentate ligand; for these L1 corresponds to the Cp<sup>-</sup>-based ligand, L2 corresponds to the bidentate ligand and L3 corresponds to the monodentate ligand.</li> <li>Some ligands make formally covalent bonds with the Ir(III) ion. For these a negatively charged bond-forming atom is drawn in the SMILES of corresponding ligand.</li> </ul>
IrLumDB: a dataset of bis-cyclometalated iridium(III) complexes luminescence properties
<h1><strong>If you use this dataset, please cite our paper</strong>: <a href="https://doi.org/10.1039/D5TC00305A">https://doi.org/10.1039/D5TC00305A</a></h1> <p>IrLumDB contains data about 1454 experimentally measured luminescence spectra of 1287 unique iridium(III) complexes reported in the 340 literature papers.</p> <p><br>The 13 columns of this dataset are explained as follows:</p> <ol> <li>L1 — SMILES representation of the L1 ligand attached to the iridium ion</li> <li>L2 — SMILES representation of the L2 ligand attached to the iridium ion</li> <li>L3 — SMILES representation of the L3 ligand attached to the iridium ion</li> <li>Counterion — SMILES representation of the counterion (if the complex molecule is charged)</li> <li>Abbreviation_in_the_article — the original abbreviation depicting the complex in the article</li> <li>Charge — the total charge of the complex molecule</li> <li>Max_wavelength(nm) — value of maximal luminescence wavelength reported in the article</li> <li>PLQY — value of quantum yield reported in the article</li> <li>tau(s*10^-6) — value of excited state lifetime reported in the article</li> <li>Solvent — solvent media for luminescence measurements reported in the article</li> <li>DOI — DOI of a data source for given values</li> <li>Notes — additional notes for presented data</li> <li>PLQY_in_train — photoluminescence quantum yields which we consider suitable for ML purposes (for all the PLQY’s for which inert atmosphere is stated in the source article “1” is stated, otherwise “0” is stated).</li> </ol> <p>An appendix to the dataset (Synthesized_complexes.csv) contains data about 33 experimentally measured luminescence spectra of 33 unique iridium(III) complexes synthesized by our research group.</p> <p><br>Additional remarks:</p> <ul> <li>The iridium(III) complexes reported in this dataset are bis-cyclometalated Ir(III) complexes, which usually contain two bidentate cyclometalated ligands and one bidentate ancillary ligand; for these L1 and L2 correspond to the cyclometalated ligands and L3 corresponds to the ancillary ligand. </li> <li>Several ligands make formally covalent bonds with the Ir(III) ion. For these a negatively charged bond-forming atom is drawn in the SMILES of corresponding ligand.</li> <li>The vast majority of quantum yield and excited state lifetime measurements were claimed to be performed in deoxygenated solutions at room temperature. If not, the conditions for measurements are presented in the ”notes” column.</li> </ul>
Polar Iridium Surface Velocity Profilers (p-iSVP), and standard Iridium Surface Velocity Profilers (iSVP) during SCALE 2019 Winter and Spring Cruises
<p><strong>Brief data description</strong></p> <p>In 2019, winter and spring scientific research expeditions aboard the SA Agulhas II were conducted along the Good-Hope line (0<sup>o</sup> E) to the Antarctic marginal ice zone (MIZ) in the north-eastern Weddell Sea region as part of the <em>Southern oCean seAsonal Experiment</em> (SCALE; Ryan-Keogh and Vichi, 2022).</p> <p>During the winter expedition, three polar Iridium Surface Velocity Profilers (p-iSVPs; MetOcean model) were deployed by the South African Weather Service (SAWS) between 27 July and 28 July 2019. These buoys were analysed in de Vos et al. (2022). The region of deployment consisted of pancake-ice conditions with an average ice thickness of 40-60 cm. The instruments were deployed by hand by three people, lowered by crane from the ship to the ice on a basket cradle. The first buoy (p-iSVP 1) was deployed in water, in between pancake ice floes, while the other two buoys (p-iSVP 2 and p-iSVP 3) were deployed on roughly circular ice floes > 3 m in diameter.</p> <p>These buoys were expendable devices that recorded GPS position, air and ice temperature, and barometric pressure. The temporal resolution is 30 minutes for p-iSVP 1 and hourly for p-iSVP 2 and p-iSVP 3. The survival of these sensors depended on their battery life, since p-iSVPs can continue to drift in the ocean after ice melting and can be further refrozen in between floes. p-iSVP 1 and p-iSVP 3 continued to transmit data until 15 October 2019. p-iSVP 2 stopped transmitting data on 25 August 2019.</p> <p>During the spring expedition, three standard Iridium Surface Velocity Profilers (iSVPs 4-6; Pacific Gyre model) were deployed by SAWS between 24 October and 28 October 2019 (de Vos et al., 2022). Specifically-designed frames were built around these three iSVPs to allow them to stand securely on the ice, without damaging the non-polar battery, and also to make sure they operated as Lagrangian ice trackers. These buoys were deployed during first-year ice conditions, with an average ice thickness of 80-90 cm. The instruments were deployed with the same protocol as the winter buoys.</p> <p>These buoys recorded GPS position, air temperature and barometric pressure, every hour. Their survival, like the winter p-iSVPs, also depended on their battery life, and therefore it was possible for them to continue to drift after ice melting. The iSVPs transmitted data until 19 December 2019.</p> <p><strong>Buoy names and raw data:</strong></p> <p>p-iSVP 1: 300234067003010-300234067003010-20191015T064320UTC.csv</p> <p>p-iSVP 2: 300234067002060-300234067002060-20191015T064316UTC.csv</p> <p>p-iSVP 3: 300234066992870-300234066992870-20191015T064314UTC.csv</p> <p>iSVP 4: 300234066433050.xlsx</p> <p>iSVP 5: 300234066433051.xlsx</p> <p>iSVP 6: 300234066433052.xlsx</p> <p><strong>Related code: </strong>The buoy data has been processed using https://github.com/mvichi/antarctic-buoys/. </p>
Dielectric-loss spectroscopy development and iridium photoredox catalyst ion pairing
<p>This data accompanies the publishing of the manuscript of reviving dielectric-loss spectroscopy and ion pair reorganization in an iridium photoredox catalyst. The data consists of microwave transients, microwave resonances, absorption/emission, and Stern-Volmer quenching data.</p>
Dataset: Iridium Communications Inc. (IRDM) Stock Performance
This dataset provides historical stock market performance data for specific companies. It enables users to analyze and understand the past trends and fluctuations in stock prices over time. This information can be utilized for various purposes such as investment analysis, financial research, and market trend forecasting.
Fig. 4 in The weathering-modified iridium record of a new Cretaceous-Palaeogene site at Lechówka near Chełm, SE Poland, and its palaeobiologic implications
Fig. 4. Two−step interpretation of weathering−modified iridium anomaly in the K–Pg succession at Lechówka (see Fig. 3), showing a significant original iridium anomaly (A) altered by secondary redistribution/participation processes (B), resulting in a substantial extension of the iridium enrichment and a lower position of the diminished iridium spike relative to the K–Pg boundary clay, perhaps controlled by a precipitation front at an assumed redox barrier (cf. Sawłowicz 1993; Gawrilov 2010). Observed and expected weathering−controlled iridium chemostratigraphic profiles are shown (the iridiumr baseline is carefully taken as 0.1 ppb; see Table 2), as well as the comparative placement of the recognised iridium enrichment against a diversity of K–Pg reference levels and key localities (compiled from Crocket et al. 1988, Hansen et al. 1989, Koeberl et al. 2007, and Schulte et al. 2010).
Fig. 1 in The weathering-modified iridium record of a new Cretaceous-Palaeogene site at Lechówka near Chełm, SE Poland, and its palaeobiologic implications
Fig. 1. Location of the Lechówka section in Poland (A), and general view of this outcrop (B). K, Cretaceous; Pg, Palaeogene.
Fig. 2 in The weathering-modified iridium record of a new Cretaceous-Palaeogene site at Lechówka near Chełm, SE Poland, and its palaeobiologic implications
Fig. 2. Lithologic column, field photo and two close−ups of the K–Pg passage at Lechówka. Note a local abundance of burrows (b) and Fe oxy−hydroxides, especially in the boundary clay.
Dataset to accompany publication "Photodeposition-Based Synthesis of TiO2@IrOx Core-Shell Catalyst for Proton-Exchange Membrane Water Electrolysis with Low Iridium Loading"
<h2>Dataset description</h2> <p>This dataset provides the raw data for the manuscript "Photodeposition-Based Synthesis of TiO<sub>2</sub>@IrO<sub>x</sub> Core-Shell Catalyst for Proton-Exchange Membrane Water Electrolysis with Low Iridium Loading"<strong> </strong>published in <em>Advanced Science </em>on 14 June 2024 (DOI: <a href="https://doi.org/10.1002/advs.202402991">https://doi.org/10.1002/advs.202402991</a>).</p> <p>The data consists of:</p> <ol> <li>XRD pattern of TiO<sub>2</sub>@IrO<sub>x</sub> (40 wt% Ir) as shown in Fig. 3e.</li> <li>XPS spectra of 3 samples: <strong>2.1</strong> TiO<sub>2</sub>@IrO<sub>x</sub> (40 wt% Ir) as shown in Fig. 3f.; <strong>2.2 </strong>TiO<sub>2</sub>@IrO<sub>x</sub> (only shell) as shown in Fig. 3g; <strong>2.3</strong> TiO<sub>2</sub>@IrO<sub>x</sub> (photodeposited seeds) as shown in Fig. S8.</li> <li>Datasets for NanoCT of the TiO<sub>2</sub>@IrO<sub>x</sub> catalyst layer as shown in Fig. 5 a-c : <strong>3.1</strong> HRES Tilt series; <strong>3.2 </strong>reconstructed slices.</li> </ol> <h2>Abstract</h2> <p>The widespread application of green hydrogen production technologies requires cost reduction of crucial elements. To achieve this, a viable pathway to reduce the iridium loading in proton exchange membrane water electrolysis (PEMWE) is explored. Herein, we present a scalable synthesis method based on a photodeposition process for a TiO<sub>2</sub>@IrO<sub>x</sub> core-shell catalyst with a reduced iridium content as low as 40 wt%. Using this synthesis route, we obtain titania support particles homogeneously coated with a thin iridium oxide shell of only 2.1 ± 0.4 nm. The catalyst exhibits not only high ex situ activity, but also decent stability compared to commercially available catalysts. Furthermore, the unique core-shell structure provides a threefold increased electrical powder conductivity compared to structures without the shell. In addition, the low iridium content facilitates the fabrication of sufficiently thick catalyst layers at decreased iridium loadings mitigating the impact of crack formation in the catalyst layer during PEMWE operation. We demonstrate that the novel TiO<sub>2</sub>@IrO<sub>x</sub> core-shell catalyst clearly outperforms the commercial reference in single-cell tests with an iridium loading below 0.3 mg<sub>Ir</sub> cm<sup>‑2 </sup>exhibiting a superior iridium-specific power density of 17.9 kW g<sub>Ir</sub><sup>-1 </sup>compared to 10.4 kW g<sub>Ir</sub><sup>-1 </sup>for the commercial reference.</p>
First-principles simulations of exciton transfer between N-heterocyclic carbene iridium (III) complexes in blue organic light-emitting diodes
<p>N-heterocyclic carbene (NHC) iridium (III) complexes are promising for the use as blue emitters in organic light-emitting diodes. Exciton transfer between such organometallic complexes is investigated using time-dependent density functional theory calculations. Casida's equation is solved to study absorption and emission of the neutral and charged complexes using the ORCA package. The Sternheimer equation implemented in the Octopus code is extended to take into account spin-orbit coupling and is applied to investigate triplet excitations. Real-time propagation as implemented in the Octopus code is used to simulate exciton dynamics in an emitter dimer and to extract the exciton coupling via explicit integration of transition densities.</p>
Dataset of the article 'Spectroelectrochemistry of water oxidation kinetics in molecular versus heterogeneous oxide iridium electrocatalysts'
<p>Dataset of the article 'Spectroelectrochemistry of Water Oxidation Kinetics in Molecular versus Heterogeneous Oxide Iridium Electrocatalysts', <a href="https://doi.org/10.1021/jacs.2c02006">https://doi.org/10.1021/jacs.2c02006</a>.</p> <p>Abstract: Water oxidation is the step limiting the efficiency of electrocatalytic hydrogen production from water. Spectroelectrochemical analyzes are employed to make a direct comparison of water oxidation reaction kinetics between a molecular catalyst, the dimeric iridium catalyst [Ir<sub>2</sub>(pyalc)<sub>2</sub>(H<sub>2</sub>O)<sub>4</sub>-(µ-O)]<sup>2+</sup> (<strong>Ir<sub>Molecular</sub></strong>,<strong><sub> </sub></strong>pyalc = 2-(2’pyridinyl)-2-propanolate) immobilized on a mesoporous indium tin oxide (ITO) substrate, with that of an heterogenous electrocatalyst, an amorphous hydrous iridium (<strong>IrO<sub>x</sub></strong>) film. For both systems, four analogous redox states were detected, with the formation of Ir(4+)-Ir(5+) being the potential-determining step in both cases. However, the two systems exhibit distinct water oxidation reaction kinetics, with potential-independent first-order kinetics for <strong>Ir<sub>Molecular</sub></strong> contrasting with potential-dependent kinetics for <strong>IrO<sub>x</sub></strong>. This is attributed to water oxidation on the heterogenous catalyst requiring co-operative effects between neighboring oxidized Ir centers. The ability of <strong>Ir<sub>Molecular</sub></strong> to drive water oxidation without such co-operative effects is explained by the specific coordination environment around its Ir centers. These distinctions between molecular and heterogenous reaction kinetics are shown to explain the differences observed in their water oxidation electrocatalytic performance under different potential conditions.</p>
Have we been wrong all along about the luminescence of iridium(III) complexes? [dataset]
<p>Dataset collecting computed T1 excited state geometries as well as numerical data associated with plots used in the associated work.</p>
Stability of iridium single atoms on Fe3O4(001) in the mbar pressure range - Published and reference data
<p>Collection of data used in the publication in title, sorted for different conditions and pressures. Baselines included for pristine Fe3O4(001), in addition to Ir1-deposited surfaces.</p>
Enantioselective synthesis of spirocyclic nitrogen-containing heterocycles catalyzed by an iridium-containing cytochrome
Open the record for dataset details and reuse information.
Atomically dispersed hexavalent iridium oxide from MnO2 reduction for oxygen evolution catalysis
<p>Hexavalent iridium (Ir<sup>VI</sup>) oxide is predicted to be more active and stable than any other Ir oxide for the oxygen evolution reaction in acid; however, its experimental realization remains challenging. Here, we report the synthesis, characterization, and application of atomically dispersed Ir<sup>VI</sup> oxide (Ir<sup>VI</sup>-<em>ado</em>) for proton-exchange membrane (PEM) water electrolysis. The Ir<sup>VI</sup>-<em>ado</em> was synthesized by oxidatively substituting the ligands of K<sub>2</sub>IrCl<sub>6</sub> with manganese oxide. The mass-specific activity (1.7 × 10<sup>5</sup> A g<sub>Ir</sub><sup>-1</sup>) and turnover number (1.5 × 10<sup>8</sup>) exceeded those of benchmark Ir oxides, and <em>in-siu</em> X-ray analysis during PEM operations manifested the durability of Ir<sup>VI</sup> at current densities up to 2.3 A cm<sup>-2</sup>. The high activity and stability of Ir<sup>VI</sup>-<em>ado</em> showcase its promise as an anode material for PEM electrolysis.</p>
Dataset for journal article: "Acid-base-induced fac -> mer isomerization of luminescent iridium(III) complexes"
<p>Anastasia Yu. Gitlina, Farzaneh Fadaei-Tirani, Albert Ruggi, Carolina Plaice, Kay Severin*<br> Acid-base-induced <em>fac→mer</em> isomerization of luminescent iridium(III) complexes<br> <em>Chem. Sci.</em> <strong>2022</strong>, DOI: 10.1039/d2sc02808e</p> <p>The dataset contains the following raw data - NMR, HRMS, XRD, CD, HPLC, photophysical characterization (emission, excitation, absorption, emission lifetimes, emission quantum yields). A short video showing the isomerization from fac- to mer-Ir(ppy)3 in the well plate is also included to the data folder.</p>
Raw data: Electronic and Structural Property Comparison of a Novel vs. a Commercial Iridium-based OER Catalysts Enabled by Operando Ir L3-edge X-ray Absorption Spectroscopy
<p>Raw data for the manuscript titled:</p> <p><strong>Electronic and Structural Property Comparison of a Novel vs. a Commercial Iridium-based OER Catalysts Enabled by <em>Operando </em>Ir L3-edge X-ray Absorption Spectroscopy</strong></p> <p> </p>
Raw data: Unravelling the mechanistic complexity of oxygen evolution reaction and Ir dissolution in highly dimensional amorphous hydrous iridium oxides
<p>Raw data for the manuscript titled:</p> <p><strong>Unravelling the mechanistic complexity of oxygen evolution reaction and Ir dissolution in highly dimensional amorphous hydrous iridium oxides</strong></p> <p> </p>
Mesoporous Silica Nanoparticles for pH-Responsive Delivery of Iridium Metallotherapeutics and Treatment of Glioblastoma Multiforme
<p>Using nanoparticles for controlled drug delivery to cancer, in response to its weakly acidic environment, represents a promising approach toward increasing the effectiveness and reducing the adverse effects of cancer therapy. Hence, the aim of this study is to construct novel mesoporous silica nanoparticle (MSN)-based acidification-responsive drug delivery systems for targeted cancer therapy. Herein, the surface of MSN is covalently functionalized with Ir(III)-based complex through a pH-cleavable hydrazone-based linker and characterized by nitrogen sorption, SEM, FTIR, EDS, TGA, DSC, DLS, and zeta potential measurements. Enhanced release of Ir(III)-complexes is evidenced by UV/VIS spectroscopy at the weakly acidic environments (pH 5 and pH 6) in comparison to the release at physiological conditions. The in vitro toxicity of the prepared materials is tested on healthy MRC-5 cells while their potential for the efficient treatment of glioblastoma multiforme is demonstrated on the U251 cell line.</p>
The Ionospheric Leg of the Substorm Current Wedge: Combining Iridium and Ground Magnetometers (Dataset)
<p>We provide the horizontal current caculated for 18 substorms presented in the accompanying from epoch -10 to epoch 30. We also provide the amplitudes of the DF and CF spherical elementary current systems that the field-aligned and equivalent field-aligned currents, respectively, can be caculated with ease using the grid area provided in the files. This a new version as the equivalent currents were incorrect in the previous version.</p>
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Allen Brain Atlas
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OpenNeuro
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