Construction of the Copper‐Functionalized Covalent Organic Framework Used as a Heterogeneous Catalyst for Click Reaction

2020 ◽  
Vol 5 (47) ◽  
pp. 15010-15014
Author(s):  
Tingjun Gao ◽  
Xiaofang Su ◽  
Huanjun Xu ◽  
Hui Hu ◽  
Chaoyuan Zeng ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Click Reaction ◽  
Covalent Organic Framework ◽  
Organic Framework

scholarly journals Correction: Copper immobilized at a covalent organic framework: an efficient and recyclable heterogeneous catalyst for the Chan–Lam coupling reaction of aryl boronic acids and amines

2019 ◽  
Vol 21 (3) ◽  
pp. 712-712
Author(s):  
Yi Han ◽  
Mo Zhang ◽  
Ya-Qing Zhang ◽  
Zhan-Hui Zhang
Keyword(s):  
Heterogeneous Catalyst ◽  
Coupling Reaction ◽  
Boronic Acids ◽  
Covalent Organic Framework ◽  
Recyclable Heterogeneous Catalyst ◽  
Organic Framework

Correction for ‘Copper immobilized at a covalent organic framework: an efficient and recyclable heterogeneous catalyst for the Chan–Lam coupling reaction of aryl boronic acids and amines’ by Yi Han et al., Green Chem., 2018, 20, 4891–4900.

scholarly journals N-Heterocyclic Carbene Functionalized Covalent Organic Framework for Transesterification of Glycerol with Dialkyl Carbonates

Catalysts ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 423
Author(s):  
Yuying Chai ◽  
Yaling Li ◽  
Hui Hu ◽  
Chaoyuan Zeng ◽  
Shenglin Wang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Heterogeneous Catalyst ◽  
Active Sites ◽  
Covalent Organic Framework ◽  
Heterogeneous Catalytic ◽  
Dialkyl Carbonates ◽  
Dialkyl Carbonate ◽  
Catalytic Active Sites ◽  
Catalytic Reactivity ◽  
Organic Framework

The development of a heterogeneous catalyst through the combination of novel carrier and powerful catalytic active sites is of particular interest. Herein, the successful integration of an N-Heterocyclic carbene (NHC) moiety into a covalent organic framework (COF) was achieved by coupling 4,4′,4′′,4′′′-(pyrene-1,3,6,8-tetrayl) tetraaniline (PyTTA) and equimolar 5,6-bis(4-formylphenyl)-1-methyl-1H-benzimidazole (IM) and 2′3′5′6′-tetrafluoro-[1,1′:4′,1′′-terphenyl]-4,4′-dicarbaldehyde (4F) followed by ionization with 1-bromobutane (C4H9Br) and then deprotonation upon addition of a base. The resulting material exhibited promising heterogeneous catalytic activity towards transesterification reaction of glycerol with dialkyl carbonate. Moreover, good recyclability granted no substantial loss of activity upon five cycles. Combination of COFs and NHCs might synergize their characteristics, thus providing more possibilities for creating new patterns of catalytic reactivity.

A Ni/Fe complex incorporated into a covalent organic framework as a single-site heterogeneous catalyst for efficient oxygen evolution reaction

2020 ◽  
Vol 7 (20) ◽  
pp. 3925-3931
Author(s):  
Xuefeng Feng ◽  
Zhi Gao ◽  
Longhui Xiao ◽  
Zhenqin Lai ◽  
Feng Luo
Keyword(s):  
Heterogeneous Catalyst ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Single Site ◽  
One Pot ◽  
Covalent Organic Framework ◽  
Molecular Catalyst ◽  
Fe Complex ◽  
Single Site Catalysts ◽  
Organic Framework

A solid COF framework served as the seeding of supported single-site catalysts to graft Ni/Fe complex molecular catalyst similar to homogeneous catalysts by one-pot post-synthetic modification.

Copper immobilized at a covalent organic framework: an efficient and recyclable heterogeneous catalyst for the Chan–Lam coupling reaction of aryl boronic acids and amines

2018 ◽  
Vol 20 (21) ◽  
pp. 4891-4900 ◽  
Author(s):  
Yi Han ◽  
Mo Zhang ◽  
Ya-Qing Zhang ◽  
Zhan-Hui Zhang
Keyword(s):  
Heterogeneous Catalyst ◽  
Coupling Reaction ◽  
Boronic Acids ◽  
Arylboronic Acids ◽  
Covalent Organic Framework ◽  
Cu Catalyst ◽  
Recyclable Heterogeneous Catalyst ◽  
Organic Framework

A covalent organic framework immobilized Cu catalyst was prepared and applied for synthesis of N-arylated products by Chan–Lam coupling reaction of arylboronic acids with various amines.

Multifunctional and robust covalent organic framework–nanoparticle hybrids

2014 ◽  
Vol 2 (21) ◽  
pp. 7944-7952 ◽  
Author(s):  
Pradip Pachfule ◽  
Manas K. Panda ◽  
Sharath Kandambeth ◽  
S. M. Shivaprasad ◽  
David Díaz Díaz ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Coupling Reactions ◽  
Heck Coupling ◽  
Covalent Organic Framework ◽  
Acidic Conditions ◽  
Biaryl Synthesis ◽  
Supported Pd ◽  
Efficient Heterogeneous Catalyst ◽  
Organic Framework

Highly stable COF supported Pd(0) and Pd(ii) nanoparticles (i.e.Pd(0)@Tppa-1 and Pd(ii)@TpPa-1) have been synthesized. Pd(0)@TpPa-1 serves as a robust and efficient heterogeneous catalyst for copper free Sonogashira and Heck coupling reactions under basic conditions, whereas Pd(ii)@TpPa-1 satisfactorily catalyzes intramolecular oxidative biaryl synthesis under acidic conditions.

Tuning the pore structures and photocatalytic properties of a 2D covalent organic framework with multi-branched photoactive moieties

Nanoscale ◽  
2020 ◽  
Vol 12 (30) ◽  
pp. 16136-16142
Author(s):  
Xuan Wang ◽  
Ming-Jie Dong ◽  
Chuan-De Wu
Keyword(s):  
Photocatalytic Properties ◽  
Effective Strategy ◽  
Covalent Organic Framework ◽  
Highly Efficient ◽  
Pore Structures ◽  
Local Connection ◽  
Organic Framework

An effective strategy to incorporate accessible metalloporphyrin photoactive sites into 2D COFs by establishing a 3D local connection for highly efficient photocatalysis was developed.

A Three-Dimensional Tetraphenylethylene-Based Fluorescence Covalent Organic Framework for Molecular Recognition

2020 ◽  
Author(s):  
Junxia Ren ◽  
Yaozu Liu ◽  
Xin Zhu ◽  
Yangyang Pan ◽  
Yujie Wang ◽  
...  
Keyword(s):  
Molecular Recognition ◽  
Fluorescence Probe ◽  
Three Dimensional ◽  
Hazardous Substances ◽  
Covalent Organic Framework ◽  
Highly Sensitive ◽  
Volatile Organic ◽  
Polycyclic Aromatic ◽  
Better Than ◽  
Organic Framework

<p><a></a><a></a><a></a><a></a><a></a><a></a><a></a><a>The development of highly-sensitive recognition of </a><a></a><a></a><a></a><a></a><a>hazardous </a>chemicals, such as volatile organic compounds (VOCs) and polycyclic aromatic hydrocarbons (PAHs), is of significant importance because of their widespread social concerns related to environment and human health. Here, we report a three-dimensional (3D) covalent organic framework (COF, termed JUC-555) bearing tetraphenylethylene (TPE) side chains as an aggregation-induced emission (AIE) fluorescence probe for sensitive molecular recognition.<a></a><a> </a>Due to the rotational restriction of TPE rotors in highly interpenetrated framework after inclusion of dimethylformamide (DMF), JUC-555 shows impressive AIE-based strong fluorescence. Meanwhile, owing to the large pore size (11.4 Å) and suitable intermolecular distance of aligned TPE (7.2 Å) in JUC-555, the obtained material demonstrates an excellent performance in the molecular recognition of hazardous chemicals, e.g., nitroaromatic explosives, PAHs, and even thiophene compounds, via a fluorescent quenching mechanism. The quenching constant (<i>K</i><sub>SV</sub>) is two orders of magnitude better than those of other fluorescence-based porous materials reported to date. This research thus opens 3D functionalized COFs as a promising identification tool for environmentally hazardous substances.</p>

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