Photo-oxidation by singlet oxygen generated on nanoporous silicon in a LED-powered reactor

Lapkin, Alexei; Boddu, Veera M.; Aliev, G. N.; Göller, Bernhard; Polisski, Sergej; Ковалев, Д. И.

doi:10.1016/j.cej.2007.04.013

Cited by 38 publications

(19 citation statements)

References 26 publications

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“…Whilst yet to be employed in a synthetic context, it has been shown that porous silica nanoparticles can effectively produce singlet oxygen when irradiated with LEDs in the oxidative degradation of 1,3-diphenylisobenzofuran [40]. …”

Section: Reviewmentioning

confidence: 99%

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Flow photochemistry: Old light through new windows

Knowles

Elliott²,

Booker‐Milburn³

2012

Beilstein J. Org. Chem.

374

190

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SummarySynthetic photochemistry carried out in classic batch reactors has, for over half a century, proved to be a powerful but under-utilised technique in general organic synthesis. Recent developments in flow photochemistry have the potential to allow this technique to be applied in a more mainstream setting. This review highlights the use of flow reactors in organic photochemistry, allowing a comparison of the various reactor types to be made.

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Section: Reviewmentioning

confidence: 99%

“…In a particularly novel example, researchers generated 1 O 2 on nanoporous silicon excited by the emissions from green LEDs [40]. The reactor was used to decompose diphenylisobenzofuran with an estimated quantum yield of 34% although it was not put to any synthetic use.…”

Section: Reviewmentioning

confidence: 99%

Flow photochemistry: Old light through new windows

Knowles

Elliott²,

Booker‐Milburn³

2012

Beilstein J. Org. Chem.

374

190

View full text Add to dashboard Cite

show abstract

“…Thus, the initial focus was on microreactors which used a large surface area to volume ratio to get uniform light distribution across the reaction solution . Applying a similar logic, macroreactors were also designed wherein a thin annular vessel, or coiled tubing, was used to meet the demand for a large surface area for the reaction solution . The low solubility of oxygen in these reaction solutions continued to throw up problems.…”

Section: Figurementioning

confidence: 99%

“…[4][5][6][7][8][9][10][11][12][13][14][15][16] Applying as imilar logic, macroreactors were also designed wherein at hin annular vessel, or coiled tubing, was used to meet the demand for al arge surface area for the reaction solution. [17,18] The low solubility of oxygen in these reaction solutionsc ontinued to throw up problems. One solution was the design of CFRs using supercritical CO 2 (scCO 2 )w hich also supports longer 1 O 2 lifetimes.…”

mentioning

confidence: 99%

A Novel Nebulizer‐Based Continuous Flow Reactor: Introducing the Use of Pneumatically Generated Aerosols for Highly Productive Photooxidations

et al. 2017

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Abstract:A very effective and highly innovative continuous flow reactor (CFR) for undertaking important large scale photooxidations is presented. Until now, two major issues have obstructed the widespread use of photooxidation CFRs; both problems are nullified by this novel and yet extremely simple reactor design. The first issue related to the detrimental effect of poor oxygen solubility on the rate of the biphasic gas-liquid reactions and the second was the rapid attenuation of light by solutions which severely limited dimension enlarging opportunities. The new and easy to operate reactor works by nebulizing a photooxidation solution inside a cylindrical chamber surrounded by a low energy LED strip; thus, the interfacial area between the two phases is maximized, leading to greatly improved reaction rates and excellent light penetration. This pneumatic nebulizer-based photooxygenation system (NebPhotOX) can use air (as the oxygen source) and very concentrated photooxidation solutions. NebPhotOX has very high productivity and could potentially be scaled up easily to work in an industrial setting.

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“…Applications that have been demonstrated range from photodynamic cancer therapy [4,5] to optically activated reactors in chemical engineering [6]. …”

Section: Introductionmentioning

confidence: 99%

Magnetic field dependence of singlet oxygen generation by nanoporous silicon

et al. 2014

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Energy transfer from photoexcited excitons localized in silicon nanoparticles to adsorbed oxygen molecules excites them to the reactive singlet spin state. This process has been studied experimentally as a function of nanoparticle size and applied external magnetic field as a test of the accepted understanding of this process in terms of the exchange coupling between the nano-Si exciton and the adsorbed O2 molecules.

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Photo-oxidation by singlet oxygen generated on nanoporous silicon in a LED-powered reactor

Cited by 38 publications

References 26 publications

Flow photochemistry: Old light through new windows

Flow photochemistry: Old light through new windows

A Novel Nebulizer‐Based Continuous Flow Reactor: Introducing the Use of Pneumatically Generated Aerosols for Highly Productive Photooxidations

Magnetic field dependence of singlet oxygen generation by nanoporous silicon

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