Journal article
Structural, spectroscopic, and computational evaluations of cation–cation and halogen bonding interactions in heterometallic uranyl hybrid materials
Inorganic chemistry frontiers, Vol.8(5), pp.1128-1141
03/09/2021
DOI: 10.1039/D0QI01319F
Abstract
Harnessing the nominally terminal oxo atoms of the linear uranyl (UO22+) cation represents a frontier within the field of f-element hybrid materials. Here we outline a route for systematically accessing uranyl oxo atoms via judicious pairing with Ag+ cations or iodobenzoates, and describe the syntheses and crystal structures of four new heterometallic compounds containing Ag+ cations, the UO22+ cation, and o- (1), m- (2), p-iodo- (3), and 2,5-diiodo- (4) carboxylate ligands. Vibrational and luminescence spectroscopic properties for all four compounds are reported, as are computational findings from quantum chemical calculations and density-based quantum theory of atoms in molecules (QTAIM) analyses. Single crystal X-ray diffraction analysis of compounds 1–4 shows that the nominally terminal uranyl oxo atoms are engaged in either covalent UO2–Ag cation–cation interactions (1 and 3) or non-covalent assembly via halogen bonding interactions (2 and 4). Raman, infrared (IR), and luminescence spectra of 1–4 are redshifted with respect to the free uranyl cation indicating that both halogen–oxo and cation–cation interactions weaken the UO bond, and in the case of 3 we note a rare example of activation of the uranyl asymmetric stretch (ν3) in the Raman spectra, likely due to the Ag–oxo cation–cation interaction lowering the symmetry of the uranyl cation. Quantum chemical calculations and QTAIM analysis highlight a quantitative difference between halogen bonds and cation–cation interactions, with the latter shown to significantly decrease uranyl bond orders and electron density at bond critical points.
Details
- Title: Subtitle
- Structural, spectroscopic, and computational evaluations of cation–cation and halogen bonding interactions in heterometallic uranyl hybrid materials
- Creators
- Korey P Carter - Department of Chemistry, The George Washington University, Washington, USA, Chemical Sciences DivisionMark Kalaj - Department of Chemistry, The George Washington University, Washington, USA, Department of Chemistry and BiochemistrySapphire McNeil - Department of Chemistry, Lancaster University, Bailrigg, Lancaster LA1 4YB, UKAndrew Kerridge - Department of Chemistry, Lancaster University, Bailrigg, Lancaster LA1 4YB, UKMark H Schofield - Department of Chemistry, The George Washington University, Washington, USAJ. August Ridenour - Department of Chemistry, The George Washington University, Washington, USAChristopher L Cahill - Department of Chemistry, The George Washington University, Washington, USA
- Resource Type
- Journal article
- Publication Details
- Inorganic chemistry frontiers, Vol.8(5), pp.1128-1141
- DOI
- 10.1039/D0QI01319F
- ISSN
- 2052-1553
- eISSN
- 2052-1553
- Grant note
- DOI: 10.13039/100006151, name: Basic Energy Sciences, award: DE-FG02-05ER15736; DOI: 10.13039/100014037, name: National Defense Science and Engineering Graduate; DOI: 10.13039/100008227, name: Achievement Rewards for College Scientists Foundation
- Language
- English
- Date published
- 03/09/2021
- Academic Unit
- Chemistry
- Record Identifier
- 9984216705102771
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