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Electrochemical Reduction of CO 2 Catalyzed by Re(pyridine-oxazoline)(CO) 3 Cl Complexes

Journal Article · · Inorganic Chemistry
 [1];  [1];  [2];  [1];  [3];  [4];  [3];  [5];  [1]
  1. Univ. of Connecticut, Storrs, CT (United States). Dept. of Chemistry
  2. Vassar College, Poughkeepsie, NY (United States). Dept. of Chemistry
  3. DePaul Univ., Chicago, IL (United States). Dept. of Chemistry
  4. Yale Univ., New Haven, CT (United States). Dept. of Chemistry
  5. Yale Univ., New Haven, CT (United States). Dept. of Chemistry; Brookhaven National Lab. (BNL), Upton, NY (United States). Chemistry Division
In a series of rhenium tricarbonyl complexes coordinated by asymmetric diimine ligands containing a pyridine moiety bound to an oxazoline ring were synthesized, structurally and electrochemically characterized, and screened for CO2 reduction ability. We reported complexes are of the type Re(N-N)(CO)3Cl, with N-N = 2-(pyridin-2-yl)-4,5-dihydrooxazole (1), 5-methyl-2-(pyridin-2-yl)-4,5-dihydrooxazole (2), and 5-phenyl-2-(pyridin-2-yl)-4,5-dihydrooxazole (3). The electrocatalytic reduction of CO2 by these complexes was observed in a variety of solvents and proceeds more quickly in acetonitrile than in dimethylformamide (DMF) and dimethyl sulfoxide (DMSO). The analysis of the catalytic cycle for electrochemical CO2 reduction by 1 in acetonitrile using density functional theory (DFT) supports the C–O bond cleavage step being the rate-determining step (RDS) (ΔG = 27.2 kcal mol–1). Furthermore, the dependency of the turnover frequencies (TOFs) on the donor number (DN) of the solvent also supports that C–O bond cleavage is the rate-determining step. Moreover, the calculations using explicit solvent molecules indicate that the solvent dependence likely arises from a protonation-first mechanism. Unlike other complexes derived from fac-Re(bpy)(CO)3Cl (I; bpy = 2,2'-bipyridine), in which one of the pyridyl moieties in the bpy ligand is replaced by another imine, no catalytic enhancement occurs during the first reduction potential. Remarkably, catalysts 1 and 2 display relative turnover frequencies, (icat/ip)2, up to 7 times larger than that of I.
Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
SC0001059
OSTI ID:
1349563
Report Number(s):
BNL--113673-2017-JA; KC0304030
Journal Information:
Inorganic Chemistry, Journal Name: Inorganic Chemistry Journal Issue: 6 Vol. 56; ISSN 0020-1669
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (10)

Experimental and computational exploration of photophysical and electroluminescent properties of modified 2,2′:6′,2″-terpyridine, 2,6-di(thiazol-2-yl)pyridine and 2,6-di(pyrazin-2-yl)pyridine ligands and their Re(I) complexes: Photopysics of Re(I) complexes - effect of donor-acceptor ligand journal October 2018
Solvent and Ligand Substitution Effects on the Electrocatalytic Reduction of CO 2 with [Mo(CO) 4 ( x,x ′-dimethyl-2,2′-bipyridine)] ( x =4-6) Enhanced at a Gold Cathodic Surface journal August 2018
Assessing the Electrocatalytic Properties of the {Cp*Rh III } 2+ -Polyoxometalate Derivative [H 2 PW 11 O 39 {Rh III Cp*(OH 2 )}] 3- towards CO 2 Reduction: Assessing the Electrocatalytic Properties of the {Cp*Rh III } 2+ -Polyoxometalate Derivative [H 2 PW 11 O 39 {Rh III Cp*(OH 2 )}] 3- towards CO 2 Reduction journal July 2018
Fluorescent recognition of Fe 3+ and Fe 3+ -functionalized composite materials for enhancing photocatalytic activities of Co II complexes journal January 2017
Cooperative effects of metal cations and coordination modes on luminescent s-block metal–organic complexes constructed from V-shaped 4,4′-sulfonyldiphenol journal January 2018
Polycarboxylate-directed semi-rigid pyridyl-amide-based various Ni II complexes: electrochemical properties and enhancements of photocatalytic activities by calcination journal January 2018
Photocatalytic reduction of CO 2 to CO and formate by a novel Co( ii ) catalyst containing a cis -oxygen atom: photocatalysis and DFT calculations journal January 2018
Phosphine oxide-based tricarbonylrhenium( i ) complexes from phosphine/phosphine oxide and dihydroxybenzoquinones journal January 2018
A rational design of manganese electrocatalysts for Lewis acid-assisted carbon dioxide reduction journal January 2019
Photoluminescence enhancement of Re( i ) carbonyl complexes bearing D–A and D–π–A ligands journal January 2020


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