Photosensitizers in Solar Energy Conversion

Willinger, Katja; Thelakkat, Mukundan

doi:10.1007/978-90-481-3872-2_11

Cited by 3 publications

(2 citation statements)

References 347 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Variation of the ketene acetal’s silicon group resulted in decreased yields compared to the TBS ketene acetal (Table , entries 6–8). The rarely used solvent valeronitrile gave the best results during our investigations, which relates to several previous records of nitriles as excellent solvents for OXB-mediated Mukaiyama aldol reactions. ,, The configuration of the obtained ζ-hydroxy-α,β,γ,δ-unsaturated esters can be rationalized with Yamamoto’s proposed transition state and was verified by Mosher-ester analysis (see Supporting Information). …”

supporting

confidence: 84%

Oxazaborolidinone-Mediated Asymmetric Bisvinylogous Mukaiyama Aldol Reaction

et al. 2021

View full text Add to dashboard Cite

A bisvinylogous Mukaiyama aldol reaction using oxazaborolidinones as a source of chirality was developed. This methodology allows the fast assembly of conjugated dienols by expanding the vinylogy principle by two additional carbons, and can be conducted using a readily available Lewis acid at reasonable reaction times. A broad range of aromatic and aliphatic aldehydes can be used providing access to complex building blocks for polyketide synthesis.

show abstract

supporting

confidence: 84%

Oxazaborolidinone-Mediated Asymmetric Bisvinylogous Mukaiyama Aldol Reaction

et al. 2021

View full text Add to dashboard Cite

show abstract

“…For example, similar reaction pathways have recently been proposed for the dissociation of the S–S bond in dimethyl disulfide or O 2 dissociation . In addition, near fields play a crucial role in hybrid systems combining plasmonic nanostructures with molecular photosensitizers, with applications in H 2 generation or CO 2 dissociation. ,− In these systems, the maximization of plasmonic field enhancements and their spectral tuning to the absorption of the reactant molecules can be the key to drive chemical transformations without the use of high-intensity lasers and to replace them with low-cost photon sources such as LEDs or the sun.…”

Section: Discussionmentioning

confidence: 99%

Spatial Distributions of Single-Molecule Reactivity in Plasmonic Catalysis

Ezendam,

Gargiulo,

Sousa-Castillo

et al. 2023

ACS Nano

View full text Add to dashboard Cite

Plasmonic catalysts have the potential to accelerate and control chemical reactions with light by exploiting localized surface plasmon resonances. However, the mechanisms governing plasmonic catalysis are not simple to decouple. Several plasmon-derived phenomena, such as electromagnetic field enhancements, temperature, or the generation of charge carriers, can affect the reactivity of the system. These effects are convoluted with the inherent (nonplasmonic) catalytic properties of the metal surface. Disentangling these coexisting effects is challenging but is the key to rationally controlling reaction pathways and enhancing reaction rates. This study utilizes super-resolution fluorescence microscopy to examine the mechanisms of plasmonic catalysis at the single-particle level. The reduction reaction of resazurin to resorufin in the presence of Au nanorods coated with a porous silica shell is investigated in situ. This allows the determination of reaction rates with a single-molecule sensitivity and subparticle resolution. By variation of the irradiation wavelength, it is possible to examine two different regimes: photoexcitation of the reactant molecules and photoexcitation of the nanoparticle’s plasmon resonance. In addition, the measured spatial distribution of reactivity allows differentiation between superficial and far-field effects. Our results indicate that the reduction of resazurin can occur through more than one reaction pathway, being most efficient when the reactant is photoexcited and is in contact with the Au surface. In addition, it was found that the spatial distribution of enhancements varies, depending on the underlying mechanism. These findings contribute to the fundamental understanding of plasmonic catalysis and the rational design of future plasmonic nanocatalysts.

show abstract