skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Redox-Inactive Metal Cations Modulate the Reduction Potential of the Uranyl Ion in Macrocyclic Complexes

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.9b11903· OSTI ID:1600028

Capture and activation of the water-soluble uranyl dication (UO22+) remains a challenging problem, as few rational approaches are available for modulating the reactivity of this species. Here, we report the divergent synthesis of heterobimetallic complexes in which UO22+ is held in close proximity to a range of redox-inactive metals by a tailored macrocyclic ligand. Crystallographic and spectroscopic studies confirm assembly of homologous UVI(μ-OAr)2Mn+ cores with a range of mono-, di-, and tri-valent Lewis acids (Mn+). Cyclic voltammetry data demonstrate that the UVI/UV reduction potential in these com-plexes is modulated over a span of 600 mV, depending linearly on the Lewis acidity of the redox-inactive metal with a sensitivity of 61±9 mV/pKa unit. These findings suggest that interactions with Lewis acids could be effectively leveraged for rational tuning of the electronic and thermochemical properties of the 5f elements, reminiscent of strategies more commonly employed with 3d transition metals.

Research Organization:
Univ. of Kansas, Lawrence, KS (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0019169
OSTI ID:
1600028
Journal Information:
Journal of the American Chemical Society, Vol. 142, Issue 6; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

References (41)

Gas-Phase Energetics of Actinide Oxides: An Assessment of Neutral and Cationic Monoxides and Dioxides from Thorium to Curium journal November 2009
Covalency in f-element complexes journal January 2013
Coordination of uranyl(VI) carbonate species in aqueous solutions journal December 1996
Thermal and Photochemical Reduction and Functionalization Chemistry of the Uranyl Dication, [U VI O 2 ] 2+ journal August 2019
Reduction and selective oxo group silylation of the uranyl dication journal January 2008
Silylation of the Uranyl Ion Using B(C 6 F 5 ) 3 -Activated Et 3 SiH journal October 2011
Uranyl to Uranium(IV) Conversion through Manipulation of Axial and Equatorial Ligands journal February 2018
Uranyl oxo activation and functionalization by metal cation coordination journal November 2010
Catalytic one-electron reduction of uranyl( vi ) to Group 1 uranyl( v ) complexes via Al( iii ) coordination journal January 2015
The effect of iron binding on uranyl( v ) stability journal January 2018
Water-Splitting Chemistry of Photosystem II journal November 2006
Mn 4 Ca Cluster in Photosynthesis: Where and How Water is Oxidized to Dioxygen journal March 2014
A Synthetic Model of the Mn3Ca Subsite of the Oxygen-Evolving Complex in Photosystem II journal August 2011
Redox-inactive metals modulate the reduction potential in heterometallic manganese–oxido clusters journal March 2013
Efficient Catalytic Oxidation of Alkanes by Lewis Acid/[Os VI (N)Cl 4 ] Using Peroxides as Terminal Oxidants. Evidence for a Metal-Based Active Intermediate journal August 2008
Lewis acid-activated oxidation of alcohols by permanganate journal January 2011
Crystal structure of a metal ion-bound oxoiron(IV) complex and implications for biological electron transfer journal July 2010
Redox-inactive metal ions modulate the reactivity and oxygen release of mononuclear non-haem iron(III)–peroxo complexes journal September 2014
The Effects of Redox-Inactive Metal Ions on the Activation of Dioxygen: Isolation and Characterization of a Heterobimetallic Complex Containing a Mn III –(μ-OH)–Ca II Core journal June 2011
Assembly and Properties of Heterobimetallic Co II/III /Ca II Complexes with Aquo and Hydroxo Ligands journal October 2012
Synthesis and electrochemical properties of oxo-bridged manganese dimers incorporating alkali and alkaline earth cations journal October 1994
Redox Potential and Electronic Structure Effects of Proximal Nonredox Active Cations in Cobalt Schiff Base Complexes journal February 2017
Multimetallic Schiff Base Complexes as Cooperative Asymmetric Catalysts journal January 2013
Trivalent Lewis Acidic Cations Govern the Electronic Properties and Stability of Heterobimetallic Complexes of Nickel journal November 2017
Polydentate ligand exchange via formation of a dimetallic complex. Crystal structures of [(thf)Fe(acen)MCl 2 ](M = Fe or Zn), [ClFe(salphen)FeCl(thf) 2 ], [Ti(acen)(thf) 2 ][CoCl 3 (thf)], and [Ti(acen)(thf) 2 ] 2 [Fe 3 Cl 8 (thf) 2 ][acen =N,N′-ethylenebis(acetylacetoneiminate), salphen =N,N′-o-phenylenebis(salicylideneiminate), and thf = tetrahydrofuran] journal January 1990
Mössbauer and magnetic properties of mononuclear, homo- and hetero-dinuclear complexes journal November 1993
Recent advances in cooperative bimetallic asymmetric catalysis: dinuclear Schiff base complexes journal January 2014
Co-complexation of urea and UO22+ in a Schiff base macrocycle: a mimic of an enzyme binding site journal May 1987
Cocomplexation of neutral guests and electrophilic metal cations in synthetic macrocyclic hosts journal July 1988
Electrochemical behaviour of acyclic and macrocyclic complexes of nickel(II), copper(II) and uranyl(VI) journal July 1986
Synthesis, X-ray Structure, and Solution NMR Studies of Ln(III) Complexes with a Macrocyclic Asymmetric Compartmental Schiff Base. Preference of the Ln(III) Ions for a Crown-Like Coordination Site journal May 1999
Asymmetric compartmental macrocyclic ligands and related mononuclear and hetero-dinuclear complexes with d- and/or f-metal ions journal October 1999
Uranyl(VI) complexes with [1+1] asymmetric compartmental ligands containing a Schiff base and a crown ether-like chamber journal December 2002
Electrochemical and Spectroelectrochemical Studies on UO 2 (saloph)L (saloph = N,N -Disalicylidene- o -phenylenediaminate, L = Dimethyl Sulfoxide or N,N -Dimethylformamide) journal February 2003
Elements of Molecular and Biomolecular Electrochemistry book January 2006
Cyclic polyethers and their complexes with metal salts journal December 1967
Synthesis and study of crown ether-appended boron dipyrrin chemosensors for cation detection journal March 2007
Theory and Application of Cyclic Voltammetry for Measurement of Electrode Reaction Kinetics. journal October 1965
NMR Chemical Shifts of Trace Impurities: Common Laboratory Solvents, Organics, and Gases in Deuterated Solvents Relevant to the Organometallic Chemist journal May 2010
NMR nomenclature. Nuclear spin properties and conventions for chemical shifts(IUPAC Recommendations 2001) journal January 2001
Further conventions for NMR shielding and chemical shifts (IUPAC Recommendations 2008) journal January 2008