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Title: CO2 hydrogenation catalyzed by iridium complexes with a proton-responsive ligand

Abstract

In this study, the catalytic cycle for the production of formic acid by CO₂ hydrogenation and the reverse reaction has received renewed attention because they are viewed as offering a viable scheme for hydrogen storage and release. In this Forum Article, CO₂ hydrogenation catalyzed by iridium complexes bearing N^N-bidentate ligands is reported. We describe how a ligand containing hydroxyl groups as proton-responsive substituents enhances catalytic performance by an electronic effect of the oxyanions and a pendent-base effect through secondary coordination sphere interaction. In particular, [(Cp*IrCl)₂(TH2BPM)]Cl₂ (Cp* = pentamethyl cyclopentadienyl, TH2BPM = 4,4',6,6'-tetrahydroxy-2,2'-bipyrimidine) promotes enormously the catalytic hydrogenation of CO₂ by these synergistic effects under atmospheric pressure and at room temperature. Additionally, newly designed complexes with azole-type ligands are applied to CO₂ hydrogenation. The catalytic efficiencies of the azole-type complexes are much higher than that of the unsubstituted bipyridine complex [Cp*Ir(bpy)(OH₂)]SO₄. Furthermore, the introduction of one or more hydroxyl groups into ligands such as 2-pyrazolyl-6-hydroxypyridine, 2-pyrazolyl-4,6-dihydroxyl pyrimidine, and 4-pyrazolyl-2,6-dihydroxyl pyrimidine enhanced catalytic activity. It is clear that the incorporation of electron-donating hydroxyl groups into proton-responsive ligands is effective for promoting the hydrogenation of CO₂.

Authors:
 [1];  [1];  [2];  [2];  [2];  [3];  [3];  [1]
  1. National Institute of Advanced Industrial Science and Technology, Ibaraki (Japan); Japan Science and Technology Agency, Saitama (Japan)
  2. National Institute of Advanced Industrial Science and Technology, Ibaraki (Japan)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1182536
Report Number(s):
BNL-107637-2015-JA
Journal ID: ISSN 0020-1669; R&D Project: CO026; KC0304030
Grant/Contract Number:  
SC00112704
Resource Type:
Accepted Manuscript
Journal Name:
Inorganic Chemistry
Additional Journal Information:
Journal Volume: 54; Journal Issue: 11; Journal ID: ISSN 0020-1669
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; proton-responsive ligand; iridium complexes; CO₂ hydrogenation

Citation Formats

Onishi, Naoya, Xu, Shaoan, Manaka, Yuichi, Suna, Yuki, Wang, Wan -Hui, Muckerman, James T., Fujita, Etsuko, and Himeda, Yuichiro. CO2 hydrogenation catalyzed by iridium complexes with a proton-responsive ligand. United States: N. p., 2015. Web. doi:10.1021/ic502904q.
Onishi, Naoya, Xu, Shaoan, Manaka, Yuichi, Suna, Yuki, Wang, Wan -Hui, Muckerman, James T., Fujita, Etsuko, & Himeda, Yuichiro. CO2 hydrogenation catalyzed by iridium complexes with a proton-responsive ligand. United States. https://doi.org/10.1021/ic502904q
Onishi, Naoya, Xu, Shaoan, Manaka, Yuichi, Suna, Yuki, Wang, Wan -Hui, Muckerman, James T., Fujita, Etsuko, and Himeda, Yuichiro. Wed . "CO2 hydrogenation catalyzed by iridium complexes with a proton-responsive ligand". United States. https://doi.org/10.1021/ic502904q. https://www.osti.gov/servlets/purl/1182536.
@article{osti_1182536,
title = {CO2 hydrogenation catalyzed by iridium complexes with a proton-responsive ligand},
author = {Onishi, Naoya and Xu, Shaoan and Manaka, Yuichi and Suna, Yuki and Wang, Wan -Hui and Muckerman, James T. and Fujita, Etsuko and Himeda, Yuichiro},
abstractNote = {In this study, the catalytic cycle for the production of formic acid by CO₂ hydrogenation and the reverse reaction has received renewed attention because they are viewed as offering a viable scheme for hydrogen storage and release. In this Forum Article, CO₂ hydrogenation catalyzed by iridium complexes bearing N^N-bidentate ligands is reported. We describe how a ligand containing hydroxyl groups as proton-responsive substituents enhances catalytic performance by an electronic effect of the oxyanions and a pendent-base effect through secondary coordination sphere interaction. In particular, [(Cp*IrCl)₂(TH2BPM)]Cl₂ (Cp* = pentamethyl cyclopentadienyl, TH2BPM = 4,4',6,6'-tetrahydroxy-2,2'-bipyrimidine) promotes enormously the catalytic hydrogenation of CO₂ by these synergistic effects under atmospheric pressure and at room temperature. Additionally, newly designed complexes with azole-type ligands are applied to CO₂ hydrogenation. The catalytic efficiencies of the azole-type complexes are much higher than that of the unsubstituted bipyridine complex [Cp*Ir(bpy)(OH₂)]SO₄. Furthermore, the introduction of one or more hydroxyl groups into ligands such as 2-pyrazolyl-6-hydroxypyridine, 2-pyrazolyl-4,6-dihydroxyl pyrimidine, and 4-pyrazolyl-2,6-dihydroxyl pyrimidine enhanced catalytic activity. It is clear that the incorporation of electron-donating hydroxyl groups into proton-responsive ligands is effective for promoting the hydrogenation of CO₂.},
doi = {10.1021/ic502904q},
journal = {Inorganic Chemistry},
number = 11,
volume = 54,
place = {United States},
year = {Wed Feb 18 00:00:00 EST 2015},
month = {Wed Feb 18 00:00:00 EST 2015}
}

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Utilization of a Fluorescent Dye Molecule as a Proton and Electron Reservoir
journal, February 2018

  • Kieffer, Ian A.; Allen, Robert J.; Fernandez, Jordan L.
  • Angewandte Chemie International Edition, Vol. 57, Issue 13
  • DOI: 10.1002/anie.201713174

A Precious Catalyst: Rhodium-Catalyzed Formic Acid Dehydrogenation in Water: A Precious Catalyst: Rhodium-Catalyzed Formic Acid Dehydrogenation in Water
journal, April 2019

  • Fink, Cornel; Laurenczy, Gábor
  • European Journal of Inorganic Chemistry, Vol. 2019, Issue 18
  • DOI: 10.1002/ejic.201900344

Enhanced Hydrogen Generation from Formic Acid by Half-Sandwich Iridium(III) Complexes with Metal/NH Bifunctionality: A Pronounced Switch from Transfer Hydrogenation
journal, August 2015

  • Matsunami, Asuka; Kayaki, Yoshihito; Ikariya, Takao
  • Chemistry - A European Journal, Vol. 21, Issue 39
  • DOI: 10.1002/chem.201502412

Half‐sandwich ruthenium complexes with S chiff base ligands bearing a hydroxyl group: Preparation, characterization and catalytic activities
journal, November 2019

  • Jia, Wei‐Guo; Wang, Zhi‐Bao; Zhi, Xue‐Ting
  • Applied Organometallic Chemistry, Vol. 34, Issue 1
  • DOI: 10.1002/aoc.5289

Cooperative iridium complex-catalyzed synthesis of quinoxalines, benzimidazoles and quinazolines in water
journal, January 2019

  • Chakrabarti, Kaushik; Maji, Milan; Kundu, Sabuj
  • Green Chemistry, Vol. 21, Issue 8
  • DOI: 10.1039/c8gc03744b

Synthesis of Carboxylic Acids and Esters from CO2
journal, December 2016


Evaluating the impacts of amino acids in the second and outer coordination spheres of Rh-bis(diphosphine) complexes for CO 2 hydrogenation
journal, January 2019

  • Walsh, Aaron P.; Laureanti, Joseph A.; Katipamula, Sriram
  • Faraday Discussions, Vol. 215
  • DOI: 10.1039/c8fd00164b

Changing the Mechanism for CO 2 Hydrogenation Using Solvent-Dependent Thermodynamics
journal, October 2017

  • Burgess, Samantha A.; Appel, Aaron M.; Linehan, John C.
  • Angewandte Chemie International Edition, Vol. 56, Issue 47
  • DOI: 10.1002/anie.201709319

Development of Effective Catalysts for Hydrogen Storage Technology Using Formic Acid
journal, September 2018

  • Onishi, Naoya; Iguchi, Masayuki; Yang, Xinchun
  • Advanced Energy Materials, Vol. 9, Issue 23
  • DOI: 10.1002/aenm.201801275

CO 2 reduction: the quest for electrocatalytic materials
journal, January 2017

  • Khezri, Bahareh; Fisher, Adrian C.; Pumera, Martin
  • Journal of Materials Chemistry A, Vol. 5, Issue 18
  • DOI: 10.1039/c6ta09875d

Carbon Nitride as a Ligand: Selective Hydrogenation of Terminal Alkenes Using [(η 5 ‐C 5 Me 5 )IrCl(g‐C 3 N 4 ‐κ 2 N,N’ )]Cl
journal, April 2020


Protic NNN and NCN Pincer-Type Ruthenium Complexes Featuring (Trifluoromethyl)pyrazole Arms: Synthesis and Application to Catalytic Hydrogen Evolution from Formic Acid
journal, December 2017

  • Nakahara, Yoshiko; Toda, Tatsuro; Matsunami, Asuka
  • Chemistry - An Asian Journal, Vol. 13, Issue 1
  • DOI: 10.1002/asia.201701474

Transfer hydrogenation of carbon dioxide and bicarbonate from glycerol under aqueous conditions
journal, January 2018

  • Heltzel, Jacob M.; Finn, Matthew; Ainembabazi, Diana
  • Chemical Communications, Vol. 54, Issue 48
  • DOI: 10.1039/c8cc03157f

Catalytic reactivity of an iridium complex with a proton responsive N-donor ligand in CO 2 hydrogenation to formate
journal, January 2018

  • Gunasekar, Gunniya Hariyanandam; Yoon, Yeahsel; Baek, Il-hyun
  • RSC Advances, Vol. 8, Issue 3
  • DOI: 10.1039/c7ra12343d

Iridium–NHC-based catalyst for ambient pressure storage and low temperature release of H 2 via the CO 2 /HCO 2 H couple
journal, January 2018

  • Semwal, Shrivats; Kumar, Abhishek; Choudhury, Joyanta
  • Catalysis Science & Technology, Vol. 8, Issue 23
  • DOI: 10.1039/c8cy02069h

Mixed-valence copper( i,ii ) complexes with 4-(1H-pyrazol-1-yl)-6-R-pyrimidines: from ionic structures to coordination polymers
journal, January 2016

  • Vinogradova, Katerina A.; Krivopalov, Viktor P.; Nikolaenkova, Elena B.
  • Dalton Transactions, Vol. 45, Issue 2
  • DOI: 10.1039/c5dt04005a

Base-free hydrogenation of CO 2 to formic acid in water with an iridium complex bearing a N,N′-diimine ligand
journal, January 2016

  • Lu, Sheng-Mei; Wang, Zhijun; Li, Jun
  • Green Chemistry, Vol. 18, Issue 16
  • DOI: 10.1039/c6gc00856a

Iridium Complexes with Proton-Responsive Azole-Type Ligands as Effective Catalysts for CO 2 Hydrogenation
journal, November 2017


Making a Splash in Homogeneous CO 2 Hydrogenation: Elucidating the Impact of Solvent on Catalytic Mechanisms
journal, July 2018

  • Wiedner, Eric S.; Linehan, John C.
  • Chemistry – A European Journal, Vol. 24, Issue 64
  • DOI: 10.1002/chem.201801759

Utilization of a Fluorescent Dye Molecule as a Proton and Electron Reservoir
journal, February 2018

  • Kieffer, Ian A.; Allen, Robert J.; Fernandez, Jordan L.
  • Angewandte Chemie, Vol. 130, Issue 13
  • DOI: 10.1002/ange.201713174

Synthesis of Carboxylic Acids and Esters from CO2
book, January 2016


A DFT Study of CO2Hydrogenation on Faujasite-Supported Ir4Clusters: on the Role of Water for Selectivity Control
journal, June 2016

  • Szyja, Bartłomiej M.; Smykowski, Daniel; Szczygieł, Jerzy
  • ChemCatChem, Vol. 8, Issue 15
  • DOI: 10.1002/cctc.201600644