Chiral Covalent Organic Frameworks with High Chemical Stability for Heterogeneous Asymmetric Catalysis

2017 ◽  
Vol 139 (25) ◽  
pp. 8693-8697 ◽  
Author(s):  
Xing Han ◽  
Qingchun Xia ◽  
Jinjing Huang ◽  
Yan Liu ◽  
Chunxia Tan ◽  
...  
Keyword(s):  
Asymmetric Catalysis ◽  
Chemical Stability ◽  
Covalent Organic Frameworks ◽  
High Chemical ◽  
Heterogeneous Asymmetric Catalysis ◽  
High Chemical Stability

Catalytic applications of recent and improved covalent organic frameworks

2022 ◽  
Vol 19 ◽  
Author(s):  
Venu Sharma ◽  
Meena Nemiwal ◽  
Dinesh Kumar
Keyword(s):  
Chemical Stability ◽  
Gas Storage ◽  
Review Article ◽  
Present Review ◽  
Covalent Organic Frameworks ◽  
Molecular Materials ◽  
High Chemical ◽  
Crystalline Materials ◽  
Catalytic Applications ◽  
High Chemical Stability

Abstract: Covalent organic frameworks (COFs) are porous crystalline materials that have emerged as promising molecular materials in optoelectronic, catalysis, and gas storage applications. COFs exhibit unique features such as adaptability for various substrates, high chemical stability, tunability, ease of working, and recyclability that render them efficient catalysts. The current mini-review article discusses the synthesis and applications of COFs as catalysts. We hope that the present review will be highly beneficial for researchers working in the area of COFs and their applications in catalysis.

scholarly journals TiO2-Coated ZnO Nanowire Arrays: A Photocatalyst with Enhanced Chemical Corrosion Resistance

Catalysts ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1289
Author(s):  
Lan Gao ◽  
Elyes Nefzaoui ◽  
Frédéric Marty ◽  
Mazen Erfan ◽  
Stéphane Bastide ◽  
...  
Keyword(s):  
Chemical Stability ◽  
Large Scale ◽  
Organic Dyes ◽  
Synthesis Method ◽  
Atomic Layer ◽  
Strong Acid ◽  
Tio2 Coating ◽  
High Chemical ◽  
Chemical Corrosion ◽  
High Chemical Stability

Photocatalysis is proven to be the most efficient and environmentally friendly method for the degradation of organic pollutants in water purification. To meet the requirement of large-scale water treatment, there are two important points: One is the lifetime and chemical stability of the photocatalyst material, especially in the complex and harsh aqueous conditions. The other is the ease of synthesis of such photocatalysts with specific nano-morphology. In this work, two common photocatalyst materials, zinc oxide (ZnO) and titanium dioxide (TiO2), are selected to form more sustainable photocatalysts with high chemical stability. This involves the combination of both TiO2 and ZnO in a two-step simple synthesis method. It appears advantageous to exploit the conformal deposition of atomic layer deposition (ALD) to achieve nanometer-thick TiO2 coating on ZnO nanowires (NWs) with a high aspect ratio, which are firmly anchored to a substrate and exhibit a large specific surface area. The high chemical stability of the ALD TiO2 coating has been investigated in detail and proven to be effective under both strong acid and strong alkaline aqueous solutions. In addition, photocatalysis experiments with organic dyes show that via this simple two-step synthesis method, the produced ZnO/TiO2 tandem does indeed exhibit improved chemical stability in a harsh environment, while allowing efficient photodegradation.

scholarly journals Annulated Dialkoxybenzenes as Catholyte Materials for Non-aqueous Redox Flow Batteries: Achieving High Chemical Stability through Bicyclic Substitution

2017 ◽  
Vol 7 (21) ◽  
pp. 1701272 ◽  
Author(s):  
Jingjing Zhang ◽  
Zheng Yang ◽  
Ilya A. Shkrob ◽  
Rajeev S. Assary ◽  
Siu on Tung ◽  
...  
Keyword(s):  
Chemical Stability ◽  
High Chemical ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
High Chemical Stability

Novel enantiomorphic Pb-coordination polymers dictated by the corresponding chiral ligands, [Pb((R,R)-TBA)(H2O)]·1.7H2O and [Pb((S,S)-TBA)(H2O)]·1.7H2O [TBA = 1,3,5-triazin-2(1H)-one-4,6-bis(alanyl)]

2021 ◽  
Author(s):  
Yunseung Kuk ◽  
Kang Min Ok
Keyword(s):  
Hydrogen Bonds ◽  
Coordination Polymers ◽  
Chemical Stability ◽  
Congo Red ◽  
Chiral Ligands ◽  
High Chemical ◽  
Selective Uptake ◽  
Congo Red Dye ◽  
Red Dye ◽  
High Chemical Stability

Two enantiomorphic Pb-coordination polymers dictated by the corresponding chiral ligands reveal high chemical stability and a selective uptake of Congo red dye through the hydrogen bonds.

Intramolecular hydrogen bond-induced high chemical stability of metal–organic frameworks

2020 ◽  
Vol 7 (19) ◽  
pp. 3548-3554
Author(s):  
Keke Wang ◽  
Qunmin Wang ◽  
Xiong Wang ◽  
Mei Wang ◽  
Qin Wang ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Intramolecular Hydrogen Bond ◽  
Chemical Stability ◽  
Metal Organic Frameworks ◽  
Carboxyl Groups ◽  
High Chemical ◽  
Metal Organic ◽  
Intramolecular Hydrogen ◽  
High Chemical Stability

Intramolecular hydrogen bonds in ligands restrict the rotation of carboxyl groups and consequently enhance the chemical stability of MOFs.

High and reversible SO2 capture by a chemically stable Cr(iii)-based MOF

2020 ◽  
Vol 8 (23) ◽  
pp. 11515-11520 ◽  
Author(s):  
Eva Martínez-Ahumada ◽  
Mariana L. Díaz-Ramírez ◽  
Hugo A. Lara-García ◽  
Daryl R. Williams ◽  
Vladimir Martis ◽  
...  
Keyword(s):  
Chemical Stability ◽  
High Uptake ◽  
High Chemical ◽  
Adsorption Sites ◽  
Preferential Adsorption ◽  
So2 Capture ◽  
Adsorption Of Co ◽  
High Chemical Stability

MIL-101(Cr)-4F(1%) shows a high uptake and high chemical stability to dry and humid SO2 and a remarkable cyclability. In situ DRIF spectroscopy upon the adsorption of CO identified the preferential adsorption sites for this MOF material.

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