Unsymmetrical indazolyl-pyridinyl-triazole ligand-promoted highly active iridium complexes supported on hydrotalcite and its catalytic application in water

2018 ◽  
Vol 20 (8) ◽  
pp. 1805-1812 ◽  
Author(s):  
Chenyang Ge ◽  
Xinxin Sang ◽  
Wei Yao ◽  
Liang Zhang ◽  
Dawei Wang
Keyword(s):  
Iridium Complex ◽  
Iridium Complexes ◽  
Highly Active ◽  
Catalytic Application ◽  
Triazole Ligand

Herein, an indazolyl-pyridinyl-triazole ligand was synthesized and its iridium complex supported on hydrotalcite was developed.

scholarly journals A Highly Active Bifunctional Iridium Complex with an Alcohol/Alkoxide-Tethered N-Heterocyclic Carbene for Alkylation of Amines with Alcohols

2012 ◽  
Vol 18 (45) ◽  
pp. 14510-14519 ◽  
Author(s):  
Agnieszka Bartoszewicz ◽  
Rocío Marcos ◽  
Suman Sahoo ◽  
A. Ken Inge ◽  
Xiaodong Zou ◽  
...  
Keyword(s):  
Iridium Complex ◽  
Highly Active

Cationic Iridium Dendrimers: Synthesis and Photophysical Properties

2011 ◽  
Vol 64 (9) ◽  
pp. 1211 ◽  
Author(s):  
Bin Du ◽  
Si-Chun Yuan ◽  
Jian Pei
Keyword(s):  
Solid State ◽  
Photophysical Properties ◽  
Dendritic Structure ◽  
Benzimidazole Derivatives ◽  
Iridium Complex ◽  
Iridium Complexes ◽  
Efficient Energy Transfer ◽  
Ancillary Ligands ◽  
Synthetic Strategy ◽  
Yellow Orange

Two dendrimers, D1 and D2, containing the cationic iridium complexes (C1 and C2) as cores and truxene-functionalized chromophores as the branches, have been developed by a convergent synthetic strategy. The cationic complexes employ 3-(pyridin-2-yl)-1H-1,2,4-triazole and 2-(pyridin-2-yl)-benzimidazole derivatives as the ancillary ligands. To avoid the change in emission colour arising from the iridium complex, the conjugation between the dendron and the ligand is decoupled by separating them using the alkyl chain. An investigation of their photoluminescent features reveals that efficient energy transfer happens from the dendrons to the core in the solid state. Likewise, the charged dendritic structure is demonstrated to be an efficient method to improve the compatibility between the polar charged iridium complexes and typical hydrophobic hosts with the additional benefit of excellent solution processability. Both dendrimers exhibit strong solvatochromic behaviours in solvents and exclusive green and yellow-orange light in the solid state.

ChemInform Abstract: A Highly Active Bifunctional Iridium Complex with an Alcohol/Alkoxide-Tethered N-Heterocyclic Carbene for Alkylation of Amines with Alcohols.

ChemInform ◽  
2013 ◽  
Vol 44 (14) ◽  
pp. no-no
Author(s):  
Agnieszka Bartoszewicz ◽  
Rocio Marcos ◽  
Suman Sahoo ◽  
A. Ken Inge ◽  
Xiaodong Zou ◽  
...  
Keyword(s):  
Iridium Complex ◽  
Highly Active

scholarly journals Post Synthetic Defect Engineering of UiO-66 Metal-Organic Framework with Iridium(III)-HEDTA Complex and Application in Catalysis for Water Oxydation

2019 ◽  
Author(s):  
Ferdinando Costantino ◽  
Alceo Macchioni ◽  
Giordano Gatto ◽  
Roberto Bondi ◽  
Fabio Marmottini
Keyword(s):  
Water Oxidation ◽  
Metal Organic Framework ◽  
Partial Substitution ◽  
Iridium Complexes ◽  
Defect Engineering ◽  
Cerium Ammonium Nitrate ◽  
Highly Active ◽  
Metal Organic ◽  
Heterogenous Catalyst ◽  
Sacrificial Agent

Clean production of renewable fuels is a great challenge of our scientific community. Iridium complexes have demonstrated a superior catalytic activity in the water oxidation (WO) reaction, which is a crucial step in water splitting process. Herein we have used a defective zirconium MOF with UiO-66 structure as support of a highly active Ir complex based on EDTA with formula [Ir(HEDTA)Cl]Na. The defects are induced by the partial substitution of tereftalic acid with smaller formiate groups. Anchoring of the complex occurs through a post-synthetic exchange of formiate anions, coordinated at the zirconium clusters of the MOF, with the free carboxylate group of the [Ir(HEDTA)Cl]-complex. The modified material was tested as heterogenous catalyst for the WO reaction by using Cerium Ammonium Nitrate as sacrificial agent. Although TOF and TON values are comparable to those of other iridium heterogenized catalysts, the MOF exhibits iridium leaching not limited at the first catalytic run, as usually observed, suggesting a lack of stability of the hybrid system under strong oxidative conditions.

scholarly journals Post Synthetic Defect Engineering of UiO-66 Metal–Organic Framework with An Iridium(III)-HEDTA Complex and Application in Water Oxidation Catalysis

Inorganics ◽  
2019 ◽  
Vol 7 (10) ◽  
pp. 123 ◽  
Author(s):  
Giordano Gatto ◽  
Alceo Macchioni ◽  
Roberto Bondi ◽  
Fabio Marmottini ◽  
Ferdinando Costantino
Keyword(s):  
Water Oxidation ◽  
Metal Organic Framework ◽  
Oxidation Catalysis ◽  
Partial Substitution ◽  
Iridium Complexes ◽  
Cerium Ammonium Nitrate ◽  
Highly Active ◽  
Water Oxidation Catalysis ◽  
Metal Organic ◽  
Organic Framework

Clean production of renewable fuels is a great challenge of our scientific community. Iridium complexes have demonstrated a superior catalytic activity in the water oxidation (WO) reaction, which is a crucial step in water splitting process. Herein, we have used a defective zirconium metal–organic framework (MOF) with UiO-66 structure as support of a highly active Ir complex based on EDTA with the formula [Ir(HEDTA)Cl]Na. The defects are induced by the partial substitution of terephthalic acid with smaller formate groups. Anchoring of the complex occurs through a post-synthetic exchange of formate anions, coordinated at the zirconium clusters of the MOF, with the free carboxylate group of the [Ir(HEDTA)Cl]− complex. The modified material was tested as a heterogeneous catalyst for the WO reaction by using cerium ammonium nitrate (CAN) as the sacrificial agent. Although turnover frequency (TOF) and turnover number (TON) values are comparable to those of other iridium heterogenized catalysts, the MOF exhibits iridium leaching not limited at the first catalytic run, as usually observed, suggesting a lack of stability of the hybrid system under strong oxidative conditions.

A coordinatively unsaturated iridium complex with an unsymmetrical redox-active ligand: (spectro)electrochemical and reactivity studies

2019 ◽  
Vol 48 (37) ◽  
pp. 13931-13942 ◽  
Author(s):  
Sebastian Sobottka ◽  
Margarethe Behr van der Meer ◽  
Estelle Glais ◽  
Uta Albold ◽  
Simon Suhr ◽  
...  
Keyword(s):  
Bond Activation ◽  
Iridium Complex ◽  
Iridium Complexes ◽  
Redox Active Ligand ◽  
Active Ligand ◽  
Redox Active ◽  
Metal Ligand

Metal–ligand cooperativity can be used in iridium complexes with an unsymmetrically substituted redox-active diamidobenzene ligand for bond activation reactions.

C–H activation of ethers by pyridine tethered PCsp3P-type iridium complexes

2016 ◽  
Vol 45 (24) ◽  
pp. 10007-10016 ◽  
Author(s):  
Peng Cui ◽  
Dominic C. Babbini ◽  
Vlad M. Iluc
Keyword(s):  
Iridium Complex ◽  
Iridium Complexes ◽  
Fischer Carbenes

An iridium complex supported by a PCPyP ligand featuring an internal pyridine tether showed selective mono-C–H activation of ethers, which represent intermediates in the synthesis of the corresponding Fischer carbenes.

scholarly journals Cationic NHC‐Phosphine Iridium Complexes: Highly Active Catalysts for Base‐Free Hydrogenation of Ketones

2020 ◽  
Vol 26 (58) ◽  
pp. 13311-13316
Author(s):  
Xu Quan ◽  
Sutthichat Kerdphon ◽  
Bram B. C. Peters ◽  
Janjira Rujirawanich ◽  
Suppachai Krajangsri ◽  
...  
Keyword(s):  
Iridium Complexes ◽  
Highly Active

Highly active, separable and recyclable bipyridine iridium catalysts for C–H borylation reactions

2018 ◽  
Vol 8 (1) ◽  
pp. 124-127 ◽  
Author(s):  
Hind Mamlouk ◽  
Jakkrit Suriboot ◽  
Praveen Kumar Manyam ◽  
Ahmed AlYazidi ◽  
David E. Bergbreiter ◽  
...  
Keyword(s):  
Iridium Complexes ◽  
Iridium Catalysts ◽  
Mild Conditions ◽  
Highly Active

Iridium complexes generated from Ir(i) precursors and PIB oligomer functionalized bpy ligands efficiently catalyzed the reaction of arenes with bis(pinacolato)diboron under mild conditions to produce a variety of arylboronate compounds.

scholarly journals Solubilised bright blue-emitting iridium complexes for solution processed OLEDs

2016 ◽  
Vol 4 (17) ◽  
pp. 3726-3737 ◽  
Author(s):  
Adam F. Henwood ◽  
Ashu K. Bansal ◽  
David B. Cordes ◽  
Alexandra M. Z. Slawin ◽  
Ifor D. W. Samuel ◽  
...  
Keyword(s):  
Blue Emission ◽  
Iridium Complex ◽  
Iridium Complexes ◽  
Solution Processed ◽  
Bright Blue

Combining a sterically bulky, electron-deficient cyclometalating C∧N ligands with an electron rich, highly rigidified N∧N ligand gives an iridium complex, that achieves extraordinarily bright blue emission (ΦPL = 90%; λmax = 459 nm in MeCN) for a cationic iridium complex.

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