Enhanced photocatalytic dehalogenation of aryl halides by combined poly-p-phenylene (PPP) and TiO2 photocatalysts

Petroff, John T.; Nguyen, Anh; Porter, Alex J.; Morales, Fraisher D.; Kennedy, Michael Peter; Weinstein, D. I.; Nazer, Hossam A. El; McCulla, Ryan D.

doi:10.1016/j.jphotochem.2016.11.024

Cited by 19 publications

(4 citation statements)

References 32 publications

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“…For instance, the group of McCulla conducted several studies on PPPs in the utilization for light-driven catalysis. They photocatalytically reduced aryl aldehydes [127] and promoted the aryl halide pinacol coupling [128] as well as dehalogenated aryl halides [129] by using PPPs. Li et al synthesized ionic-liquid-grafted rigid poly(para)phenylene microspheres which they utilized for heterogeneous catalysis by metal immobilization.…”

Section: For Catalysismentioning

confidence: 99%

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A Polymer Lost in the Shuffle: The Perspective of Poly(para)phenylenes

Kleybolte

Vagin

Rieger

2023

Macro Chemistry & Physics

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During 1990s, poly(para)phenylenes (PPPs) are one of the most prominent and hyped classes of conjugated polymers. Even though they have been heavily investigated for different applications, they are now eking out a rather niche existence. It is believed that this decline of interest partly has come from the early obstacle of synthesizing high-molecular weight, processable, and defect-free PPPs. Early examples of PPPs are not only rather oligomers than polymers but also contain many regiochemical and structural defects. Furthermore, early unsubstituted materials are infusible and insoluble, which have made their practical application almost impossible. Another reason for the decline of research interest in PPPs may be their underperformance in early applications, particularly in organic light-emitting diodes (OLEDs), which ultimately lead to a lack of follow-up publications. However, over the last two decades not only more precise and advanced synthesis methods have arisen but also a more profound understanding of those applications has been achieved within which new technological approaches have emerged. It is believed that PPPs would benefit from this development. Accordingly, in this perspective, the synthesis, structures, properties, and applications of PPPs reported so far as well as their potential in future technologies are discussed.

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Section: For Catalysismentioning

confidence: 99%

“…For instance, the group of McCulla conducted several studies on PPPs in the utilization for light‐driven catalysis. They photocatalytically reduced aryl aldehydes [ 127 ] and promoted the aryl halide pinacol coupling [ 128 ] as well as dehalogenated aryl halides [ 129 ] by using PPPs. Li et al.…”

Section: Applications Of Poly(para)phenylenesmentioning

confidence: 99%

A Polymer Lost in the Shuffle: The Perspective of Poly(para)phenylenes

Kleybolte

Vagin

Rieger

2023

Macro Chemistry & Physics

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“…For example, ZnSe/CdS core-shell quantum dots could reduce 2-bromopyridine and 2-chloroquine under visible light conditions, and the yields were 76% and 49%, respectively [ 80 ]. When TiO 2 and conjugated polymer poly( p -benzene) (PPP) were successfully used as multiphase co-catalyst (PPP/TiO 2 ), electron-adsorbing group substituted aryl bromide/chlorine could be reduced for hydrodehalogenation under visible light conditions with triethylamine as an electron donor [ 82 ]. A new covalent triazine frameworks (CTF) containing phenanthroline fragments (Phen-CTF), as the visible light-mediated photocatalyst, showed an outstanding activity for the dehalogenation processes of aryl bromides and aryl chlorides with electron-withdrawing group to form C-C, C-P and C-B bonds [ 83 ].…”

Section: Othersmentioning

confidence: 99%

Visible-Light Photocatalytic Reduction of Aryl Halides as a Source of Aryl Radicals

et al. 2022

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Aryl- and heteroaryl units are present in a wide variety of natural products, pharmaceuticals, and functional materials. The method for reduction of aryl halides with ubiquitous distribution is highly sought after for late-stage construction of various aromatic compounds. The visible-light-driven reduction of aryl halides to aryl radicals by electron transfer provides an efficient, simple, and environmentally friendly method for the construction of aromatic compounds. This review summarizes the recent progress in the generation of aryl radicals by visible-light-driven reduction of aryl halides with metal complexes, organic compounds, semiconductors as catalysts, and alkali-assisted reaction system. The ability and mechanism of reduction of aromatic halides in various visible light induced systems are summarized, intending to illustrate a comprehensive introduction of this research topic to the readers.

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“…This wide-bandgap hinders its usage in environmental applications. Therefore, increasing the photocatalytic activity of TiO 2 is a challenging issue [74,75].…”

Section: Titanium Dioxide As a Photocatalystmentioning

confidence: 99%

A Review of the Use of Semiconductors as Catalysts in the Photocatalytic Inactivation of Microorganisms

et al. 2021

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Obtaining clean and high-quality water free of pathogenic microorganisms is a worldwide challenge. Various techniques have been investigated for achieving an effective removal or inactivation of these pathogenic microorganisms. One of those promising techniques is photocatalysis. In recent years, photocatalytic processes used semiconductors as photocatalysts. They were widely studied as a green and safe technology for water disinfection due to their high efficiency, being non-toxic and inexpensive, and their ability to disinfect a wide range of microorganisms under UV or visible light. In this review, we summarized the inactivation mechanisms of different waterborne pathogenic microorganisms by semiconductor photocatalysts. However, the photocatalytic efficiency of semiconductors photocatalysts, especially titanium dioxide, under visible light is limited and hence needs further improvements. Several strategies have been studied to improve their efficiencies which are briefly discussed in this review. With the developing of nanotechnology, doping with nanomaterials can increase and promote the semiconductor’s photocatalytic efficiency, which can enhance the deactivation or damage of a large number of waterborne pathogenic microorganisms. Here, we present an overview of antimicrobial effects for a wide range of nano-photocatalysts, including titanium dioxide-based, other metal-containing, and metal-free photocatalysts. Promising future directions and challenges for materials research in photocatalytic water disinfection are also concluded in this review.

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Enhanced photocatalytic dehalogenation of aryl halides by combined poly-p-phenylene (PPP) and TiO2 photocatalysts

Cited by 19 publications

References 32 publications

A Polymer Lost in the Shuffle: The Perspective of Poly(para)phenylenes

A Polymer Lost in the Shuffle: The Perspective of Poly(para)phenylenes

Visible-Light Photocatalytic Reduction of Aryl Halides as a Source of Aryl Radicals

A Review of the Use of Semiconductors as Catalysts in the Photocatalytic Inactivation of Microorganisms

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