Quaternization of a Triphenylamine-Based Conjugated Porous Organic Polymer to Immobilize PtCl62– for the Photocatalytic Reduction of 4-Nitrophenol DOI
Shiyuan Zhou,

Xiaobo Luo,

Yan Zhang

et al.

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(32), P. 15024 - 15033

Published: July 31, 2024

Photocatalytic reduction of 4-nitrophenol (4-NP) for converting it to nontoxic 4-aminophenol (4-AP) is one the most efficient approaches removing toxic 4-NP. Using porous organic polymers (POPs) as support immobilize noble metal catalysts has exhibited remarkable performance but rarely reported. Herein, a cationic triphenylamine-based POP was synthesized by quaternization PtCl62– prepare an photocatalyst named DCM-TPA-Pt 4-NP 4-AP in presence NaBH4. Different from reported methods which realize immobilization doping or complexing, and are combined through electrostatic interaction with milder reaction conditions produce this work. shows excellent photocatalytic performance, reaching 99.9% conversion within 3 min, its pseudo-first-order constant 0.0305 s–1, surpassing photocatalysts. Moreover, also exhibits equal efficiency after five continuous cycles, highlights potential utilization practical applications.

Language: Английский

Vertically Expanded Covalent Organic Frameworks for Photocatalytic Water Oxidation into Oxygen DOI
Shuailei Xie, Ruoyang Liu,

Nengyi Liu

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 6, 2024

Covalent organic frameworks with unique π architectures and pores could be developed as photocatalysts for transformations. However, they usually form π-stacking layers, so that only surface layers function in photocatalysis. Here we report a strategy developing vertically expanded to expose originally inaccessible active sites hidden catalysis. We designed covalently linked two-dimensional cobalt(II) porphyrin explored coordination bonds connect the bidentate ligands via three-component one-pot polymerization. The resultant expand interlayer space greatly, where both up down faces of each layer are exposed reactants. Unexpectedly, increase skeleton oxidation potentials, decrease exciton dissociation energy, improve pore hydrophilicity affinity water, facilitate water delivery. Remarkably, these positive effects work collectively photocatalysis into oxygen, an oxygen production rate 1155 μmol g

Language: Английский

Citations

3
Lattice Charge Tuning-Driven Multi-Carbon Products from Carbon Dioxide DOI

Geetansh Chawla,

Saurav Ch. Sarma, Jithu Raj

et al.

ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 12(26), P. 9787 - 9794

Published: June 19, 2024

Mitigating global CO2 concentrations from anthropogenic sources through electrochemical conversion to value-added chemicals is the need of hour. In this work, fundamental concept "Lattice Charge" has been strategically manipulated in materials selectively produce multi-carbon products greenhouse gas. To achieve this, a series catalysts within well-known ABX2 family (A = Ag, Cu; B In, Ga, Fe; X S, Se) have explored, which exhibit significant activity toward reduction reaction (eCO2RR) and results formation higher carbon including C3 products, acetone, energy-dense isopropanol (FE 24.5 ± 2.5%). The Hirshfeld charge analysis technique highlighted structure–activity correlation importance optimized lattice distribution as crucial tool manipulate eCO2RR product electrocatalyst designs, real-time situ ATR-FTIR probes intermediate species adsorbed during process.

Language: Английский

Citations

2
Organic and Metal–Organic Polymer-Based Catalysts—Enfant Terrible Companions or Good Assistants? DOI Creative Commons
Milan Králik, Peter Koóš, Martin Markovič

et al.

Molecules, Journal Year: 2024, Volume and Issue: 29(19), P. 4623 - 4623

Published: Sept. 29, 2024

This overview provides insights into organic and metal–organic polymer (OMOP) catalysts aimed at processes carried out in the liquid phase. Various types of polymers are discussed, including vinyl (various functional poly(styrene-co-divinylbenzene) perfluorinated functionalized hydrocarbons, e.g., Nafion), condensation (polyesters, -amides, -anilines, -imides), additional (polyurethanes, polyureas, polybenzimidazoles, polyporphyrins), prepared from organometal monomers. Covalent frameworks (COFs), (MOFs), their composites represent a significant class OMOP catalysts. Following this, preparation, characterization, application dispersed metal discussed. Key catalytic such as alkylation—used large-scale applications like production alkyl-tert-butyl ether bisphenol A—as well reduction, oxidation, other reactions, highlighted. The versatile properties COFs MOFs, well-defined nanometer-scale pores, large surface areas, excellent chemisorption capabilities, make them highly promising for chemical, electrochemical, photocatalytic applications. Particular emphasis is placed on potential CO2 treatment. However, notable drawback COF- MOF-based relatively low stability both alkaline acidic environments, high cost. A special part devoted to deactivation disposal used/deactivated catalysts, emphasizing importance separating heavy metals conclusion guidance selecting developing OMOP-based

Language: Английский

Citations

2
A Covalent Organic Nanoribbon: Preparation, Single‐Crystal Structure with Chinese Luban Lock Configuration, and Photocatalytic Behavior DOI Creative Commons
Lei Zhang, Zihao Chen,

Xiao‐Xin Li

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(43)

Published: June 27, 2024

Abstract The multiple mortise‐and‐tenon joint parts are the core factors to provide structural stability and diversity of Chinese Luban locks; however, constructing such structures is very challenging. Herein, single crystals a covalent organic nanoribbon (named CityU‐27 ) prepared through assembly hexahydroxytriphenylene (HHTP), 4,4′‐vinylenedipyridine (BYE), phenylboronic acid (BA) together dative boron←nitrogen (B←N) bonds. single‐crystal X‐ray diffraction analysis indicates that has structure, where each forms tight π–π interactions with four neighboring others generate lock‐like configuration. been demonstrated be an efficient photocatalyst in one‐pot tandem reaction hydrogen evolution (HER) semi‐hydrogenation alkynes series produce olefins without any additional photosensitizers co‐catalysts (metal‐free).

Language: Английский

Citations

1
Quaternization of a Triphenylamine-Based Conjugated Porous Organic Polymer to Immobilize PtCl62– for the Photocatalytic Reduction of 4-Nitrophenol DOI
Shiyuan Zhou,

Xiaobo Luo,

Yan Zhang

et al.

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(32), P. 15024 - 15033

Published: July 31, 2024

Photocatalytic reduction of 4-nitrophenol (4-NP) for converting it to nontoxic 4-aminophenol (4-AP) is one the most efficient approaches removing toxic 4-NP. Using porous organic polymers (POPs) as support immobilize noble metal catalysts has exhibited remarkable performance but rarely reported. Herein, a cationic triphenylamine-based POP was synthesized by quaternization PtCl62– prepare an photocatalyst named DCM-TPA-Pt 4-NP 4-AP in presence NaBH4. Different from reported methods which realize immobilization doping or complexing, and are combined through electrostatic interaction with milder reaction conditions produce this work. shows excellent photocatalytic performance, reaching 99.9% conversion within 3 min, its pseudo-first-order constant 0.0305 s–1, surpassing photocatalysts. Moreover, also exhibits equal efficiency after five continuous cycles, highlights potential utilization practical applications.

Language: Английский

Citations

1