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

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.

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.

ChemInform Abstract: Cyclometalated Iridium Complexes as Highly Active Catalysts for the Hydrogenation of Imines.

ChemInform ◽  
2014 ◽  
Vol 45 (24) ◽  
pp. no-no
Author(s):  
Weijun Tang ◽  
Chunho Lau ◽  
Xiaofeng Wu ◽  
Jianliang Xiao
Keyword(s):  
Iridium Complexes ◽  
Highly Active

scholarly journals Highly Active and Robust Cp* Iridium Complexes for Catalytic Water Oxidation

2009 ◽  
Vol 131 (25) ◽  
pp. 8730-8731 ◽  
Author(s):  
Jonathan F. Hull ◽  
David Balcells ◽  
James D. Blakemore ◽  
Christopher D. Incarvito ◽  
Odile Eisenstein ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Iridium Complexes ◽  
Highly Active

scholarly journals Design, scope and mechanism of highly active and selective chiral NHC–iridium catalysts for the intramolecular hydroamination of a variety of unactivated aminoalkenes

2021 ◽  
Author(s):  
Daven Foster ◽  
Pengchao Gao ◽  
Ziyun Zhang ◽  
Gellért Sipos ◽  
Alexandre N. Sobolev ◽  
...  
Keyword(s):  
Iridium Complexes ◽  
Iridium Catalysts ◽  
Highly Active

Chiral, cationic NHC–iridium complexes are introduced as catalysts for the intramolecular hydroamination reaction of unactivated aminoalkenes.

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.

Highly Active Catalysts for the Transfer Dehydrogenation of Alkanes: Synthesis and Application of Novel 7-6-7 Ring-Based Pincer Iridium Complexes

2013 ◽  
Vol 19 (32) ◽  
pp. 10672-10689 ◽  
Author(s):  
Yuan Shi ◽  
Takuya Suguri ◽  
Chisato Dohi ◽  
Hirotsuna Yamada ◽  
Satoshi Kojima ◽  
...  
Keyword(s):  
Iridium Complexes ◽  
Highly Active
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