Reversible Metal‐Free Carbon Dioxide Binding by Frustrated Lewis Pairs

Mömming, Cornelia M.; Otten, Edwin; Kehr, Gerald; Fröhlich, Roland; Grimme, Stefan; Stephan, Douglas W.; Erker, Gerhard

doi:10.1002/anie.200901636

Cited by 722 publications

(510 citation statements)

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“…Easily-reversible binding of carbon dioxide requires the formation of weak interactions between the Lewis acid and the base, and there are already examples of FLPs that bind CO2 and release it at remarkably low temperatures (~ −20°C). 108,111 Drawing useful comparisons between FLP systems is quite difficult as there simply are not enough complexes of a single 'type' to reliably identify trends. For instance, a bridged-FLP, (Me3C6H2)2P-CH2CH2-B(C6F5)2, was found to bind CO2 but released it above −20°C in dichloromethane.…”

Section: Carbamato and Carboxylato Complexesmentioning

confidence: 99%

“…For instance, a bridged-FLP, (Me3C6H2)2P-CH2CH2-B(C6F5)2, was found to bind CO2 but released it above −20°C in dichloromethane. 108 Meanwhile, another bridged-FLP not dissimilar in structure, tBu2P-CH2-BPh2, was stable to CO2 loss even at 100°C under vacuum. 109 The increased stability of the latter was attributed to its smaller bite angle (one less carbon in the P-(CH2)x-B chain), but the borane fragment was also not fluorinated.…”

Section: Carbamato and Carboxylato Complexesmentioning

confidence: 99%

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Structurally simple complexes of CO₂

et al. 2015

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Section: Carbamato and Carboxylato Complexesmentioning

confidence: 99%

Section: Carbamato and Carboxylato Complexesmentioning

confidence: 99%

Structurally simple complexes of CO₂

et al. 2015

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“…This centres on the activation of H 2 by so-called frustrated Lewis pairs in specifically designed, organometallic complexes (Mömming et al 2009). The critical issues for this methanol cycle (figure 8) therefore centre on the following points: -The separation (and hence availability) of CO 2 at high (volume) concentrations, for example, in large industrial plants.…”

Section: Synthetic Methanol-a Sustainable Organic Fuel For Transportmentioning

confidence: 99%

Turning carbon dioxide into fuel

Jiang

Xiao

Кузнецов

et al. 2010

Phil. Trans. R. Soc. A.

414

289

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Our present dependence on fossil fuels means that, as our demand for energy inevitably increases, so do emissions of greenhouse gases, most notably carbon dioxide (CO 2 ). To avoid the obvious consequences on climate change, the concentration of such greenhouse gases in the atmosphere must be stabilized. But, as populations grow and economies develop, future demands now ensure that energy will be one of the defining issues of this century. This unique set of (coupled) challenges also means that science and engineering have a unique opportunity-and a burgeoning challenge-to apply their understanding to provide sustainable energy solutions. Integrated carbon capture and subsequent sequestration is generally advanced as the most promising option to tackle greenhouse gases in the short to medium term. Here, we provide a brief overview of an alternative mid-to long-term option, namely, the capture and conversion of CO 2 , to produce sustainable, synthetic hydrocarbon or carbonaceous fuels, most notably for transportation purposes.Basically, the approach centres on the concept of the large-scale re-use of CO 2 released by human activity to produce synthetic fuels, and how this challenging approach could assume an important role in tackling the issue of global CO 2 emissions. We highlight three possible strategies involving CO 2 conversion by physico-chemical approaches: sustainable (or renewable) synthetic methanol, syngas production derived from flue gases from coal-, gas-or oil-fired electric power stations, and photochemical production of synthetic fuels. The use of CO 2 to synthesize commodity chemicals is covered elsewhere (Arakawa et al. 2001 Chem. Rev. 101, 953-996); this review is focused on the possibilities for the conversion of CO 2 to fuels. Although these three prototypical areas differ in their ultimate applications, the underpinning thermodynamic considerations centre on the conversionand hence the utilization-of CO 2 . Here, we hope to illustrate that advances in the science and engineering of materials are critical for these new energy technologies, and specific examples are given for all three examples.With sufficient advances, and institutional and political support, such scientific and technological innovations could help to regulate/stabilize the CO 2 levels in the atmosphere and thereby extend the use of fossil-fuel-derived feedstocks.

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“…These have been used to activate CO 2 , for example, Stephan used B(C 6 F 5 ) 3 and PtBu 3 to trap CO 2 (C in Chart 1). 10 Such activation of CO 2 using FLPs has allowed subsequent reduction to methanol and methane. 11,12 There are few, but an increasing number, of transition metal FLP type systems which can activate CO 2 X-ray quality single crystals of 1 were grown by slow diffusion of hexane into a concentrated benzene solution at 298 K over five days.…”

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confidence: 99%