Progress in the catalytic applications of cobalt N–heterocyclic carbene complexes: Emphasis on their synthesis, structure and mechanism

Budagumpi, Srinivasa; Keri, Rangappa S.; Nagaraju, D. H.; Yhobu, Zhoveta; Monica, V.; Geetha, B. M.; Kadu, Rashmi Dilip; Neole, Nupoor

doi:10.1016/j.mcat.2022.112850

Cited by 4 publications

(2 citation statements)

References 226 publications

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“…The application of Rh- and Ir-NHC complexes in catalysis is immense and includes the hydrogenation of carbonyl compounds, alkenes, and alkynes, hydrosilylation, hydroboration, and borylation, C–C bond formation, C–H bond activation, and hydrogen isotope exchange . Carbonyl complexes [M(NHC)(CO) 2 Cl] (M = Rh, Ir) and [Rh(acac)(CO)(NHC)] have been reported as a more preferable alternative to [Ni(NHC)(CO) 3 ] to measure the TEP due to the high toxicity of Ni(0) compounds. ,, …”

Section: Comparing the Various Approachesmentioning

confidence: 99%

Advances in the Synthesis and Applications of N-Heterocyclic Carbene Metal Complexes with a Focus on the Weak Base Route

Scattolin,

Logvinov,

Tzouras

et al. 2023

Organometallics

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N-heterocyclic carbene (NHC) ligands have evolved from being simple lab curiosities to tertiary phosphine mimics to finally take center stage as unique supporting ligands in organometallic chemistry, homogeneous catalysis, and more recently in medicinal chemistry and materials science applications. Some of these aspects are presented here from a perspective of researchers that have been fascinated by the area for quite some time.

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Section: Comparing the Various Approachesmentioning

confidence: 99%

Advances in the Synthesis and Applications of N-Heterocyclic Carbene Metal Complexes with a Focus on the Weak Base Route

Scattolin,

Logvinov,

Tzouras

et al. 2023

Organometallics

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“…N-Heterocyclic carbenes (NHCs) are particularly exceptional as ligands in stabilizing transition metal centers because of their binding characteristics. − The strong σ–donor and poor π–acceptor attributes of the NHCs render the Pd metal center highly stable ensuring longer catalyst lifetime and efficiency in Pd–NHC complexes . There are several benefits that NHCs offer as ligands through their various substitutions and structure tunability in designing efficient catalysts for specific applications. − These qualities of NHCs as ligands have enabled Pd–NHCs to be employed as alternatives to traditional Pd-based complexes for catalysis catered toward various cross-coupling reactions .…”

Section: Introductionmentioning

confidence: 99%

Enhancing Electrochemical Hydrogen Evolution Performance of N-Heterocyclic Carbene-Coordinated Palladium(II) Complexes with Conductive Carbon: Insights from Hydrogen Oxidation Reactions

Yhobu,

Markandeya,

Małecki

et al. 2024

ACS Appl. Energy Mater.

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The systematic design of molecular electrocatalysts for electrochemical hydrogen evolution reaction (HER) is an avenue that is still relatively unexplored. Palladium (Pd)-based molecular electrocatalysts were constructed from N-heterocyclic carbene functionalized with 1allyl-1,2,4-triazole and coumarins. The role of coumarin substitutions on the activity of the electrocatalysts for HER in an acidic medium was assessed. The Pd complex bearing 7,8benzocoumarin substitutions was found to exhibit the best activity with overpotential of −570 mV to attain a current density of 10 mA cm −2 with a Tafel slope value of 187 mV dec −1 . The HER activity of the Pd complexes were improved by incorporating with conductive carbon with the best electrode exhibiting an improved overpotential of −468 mV and Tafel slope value of 161 mV dec −1 . The developed electrocatalyst demonstrated exceptional stability for up to 12 h, with minimal efficiency decline, as evidenced by post-stability linear sweep analysis. Additionally, the post-HER analysis indicates the structural and molecular integrity of the electrocatalysts, reaffirming their prospects as models for designing electrocatalysts. Hydrogen oxidation reaction (HOR) studies were conducted by using a rotating ring disk electrode setup. The concurrent current responses of the disk and ring electrodes confirmed the HER activity of the prepared electrocatalysts.

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Recent advances in catalytic and electrocatalytic applications of half‐sandwich nickel(0/II) N–heterocyclic carbene complexes

Budagumpi,

Narayana,

Keri

et al. 2023

Applied Organom Chemis

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Diverse structural and catalytic features of half‐sandwich nickel N–heterocyclic carbene (NHC) complexes provide an encouraging platform not only to address the drawbacks of other group X (palladium and platinum) metal NHC catalysts but also to bring about their superior performance. The chemistry of nickel NHC complexes has gained substantial interest from the organometallic community owing to their remarkable stability to air and moisture, easier preparation protocols, and availability of wide scope for structural fine tuning in order to achieve targeted applications. The recent progress in the field of half‐sandwich nickel(0/II) NHC complexes is covered in this review article with a special emphasis on the different synthetic strategies employed, structural characterization including spectral and X‐ray diffraction techniques, and surface morphology of the films of complexes. Both, homogeneous and electrocatalytic applications of half‐sandwich nickel NHC complexes are discussed with respect to their potential in various C–C and C–S bond constructions, targeted C–H bond activations, reductions using silylating agents, electrocatalytic glucose sensing, and electrocatalytic hydrogen evolution reactions. Donor functionalized complexes displayed improved catalytic potential in several C–C and C–S coupling reactions over non–functionalized counterparts. Overall, this assessment, from a comprehensive standpoint, affords evidence that is advantageous in the design of novel NHC ligands to access targeted half‐sandwich nickel(0/II) NHC complexes encompassing potential homogeneous catalytic and electrocatalytic applications.

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Progress in the catalytic applications of cobalt N–heterocyclic carbene complexes: Emphasis on their synthesis, structure and mechanism

Cited by 4 publications

References 226 publications

Advances in the Synthesis and Applications of N-Heterocyclic Carbene Metal Complexes with a Focus on the Weak Base Route

Advances in the Synthesis and Applications of N-Heterocyclic Carbene Metal Complexes with a Focus on the Weak Base Route

Enhancing Electrochemical Hydrogen Evolution Performance of N-Heterocyclic Carbene-Coordinated Palladium(II) Complexes with Conductive Carbon: Insights from Hydrogen Oxidation Reactions

Recent advances in catalytic and electrocatalytic applications of half‐sandwich nickel(0/II) N–heterocyclic carbene complexes

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