SKU: 13774025315

Py-DA-COF

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Description

Py-DA-COFProduct Name NamePy DA COF Product Overview The concept of Covalent Organic Frameworks (COFs) materials was first proposed in 2005 by Yaghi et al., aiming to develop a new class of porous materials with highly ordered structures and specific functions. COF is a kind of crystalline organic porous polymer material with periodic structure formed by strong covalent bond of light elements (such as C, H, O, N, etc.). COF is derived from the polymerization

Product Name

Name:Py-DA-COF


Product Overview

The concept of Covalent Organic Frameworks (COFs) materials was first proposed in 2005 by Yaghi et al., aiming to develop a new class of porous materials with highly ordered structures and specific functions. COF is a kind of crystalline organic porous polymer material with periodic structure formed by strong covalent bond of light elements (such as C, H, O, N, etc.). COF is derived from the polymerization of small organic molecules. In order to meet the requirements of high crystallinity of COF materials, COF needs to continuously complete the recombination of covalent bonds in the polymerization process to form a long-range ordered crystal structure. Depending on the type of reaction, the main reactions to produce COF are: boric acid polycondensation (boron-oxygen bond), C-C coupling reaction (carbon-carbon bond), Schiff base reaction (imine bond), cyano-autopolymerization (triazine bond) and aryl ether polymerization (carbon-oxygen bond) reaction. Among them, CFS containing reversible boro-oxygen bonds, imine bonds and triazine bonds are the most common and widely used. The common methods of COF synthesis include solvothermal method, microwave assisted solvothermal method, mechanical force method, ionic thermal method and room temperature solution synthesis method.


Technical Parameter

Specific surface area: ~1634 m2/g

Pore size:~2.3 nm

 

Product Features

 

Low density: composed of C, H, O, N, B and other lightweight elements, low density.

High specific surface area: provides a large number of active sites and adsorption sites.

Chemical modifiability: Functional modifications can be made through the design and selection of organic monomers.

Good thermal stability and chemical stability: can maintain structural stability in a certain temperature and chemical environment.

Excellent pore properties: conducive to gas adsorption, storage and separation.

 

 

Application Fields

 

Gas storage and separation: COFs is known as a new type of porous crystal material for gas storage due to its high inherent specific surface area, extremely low density, high stability and adjustable pore size, such as storing hydrogen, carbon dioxide and other gases, and achieving efficient gas separation.

Catalysis: As a catalyst or catalyst carrier, participating in various chemical reactions. For example, improving the efficiency and selectivity of the reaction in organic synthesis. Its insolubility and high stability make it easy to separate from the reaction mixture, and the catalyst has good reusability.

Energy storage: Used for lithium-ion batteries, supercapacitors and other energy storage devices. Improve battery charging and discharging performance and cycle stability.

Sensing: Detect various substances in the environment, such as gas molecules, heavy metal ions, etc. It can be used for pollutant detection in environmental monitoring.

Liquid phase adsorption separation: A large number of open channels, large specific surface area, easy access to binding sites and high chemical stability make COF an excellent material for liquid phase adsorption.

 

Related Information

Please e-mail for the detailed characterization data.

E-mail:[email protected]

 

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SKU: 13774025315

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4.8 ★★★★★
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Mary
Chelsea, US
★★★★★ 5
A great sunscreen I have used for years!
Size: 1.7 Fl Oz (Pack of 1)
This is a product I have used with great success over the years and keep coming back to. Neutrogena is just a brand I really have trusted since my teenaged years of using their glycerin soap. This product does not disappoint. It dries down clear and moisturizes your face in preparation for makeup. I really appreciate that it plays well layering all my products and makeup like some sunscreens do. I also love the higher SPF of the product. I feel like the higher the better when it comes to the damaging sun. There is one thing I do not care for, and that is the smell. It has a strong smell at first when put on, but luckily quickly becomes unnoticeable, otherwise, I wouldn’t buy it. If I had to pick one sunscreen for my face forever, this would be it.
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Reviewed in the United States on May 24, 2026
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SLC83
Draper, US
★★★★★ 4
Wears well under makeup!
Size: 1.7 Fl Oz (Pack of 1)
Package arrived on time. No damages and product was in great condition. Pro: Goes on smoothly. Nice coverage. No white cast. Is fragrance free--no weird smell. Washes off easily with a cleansing oil or balm. Great on my sensitive skin! Wears well under my makeup, and it sat well over my vitamin c serum, too. This sunscreen layers with other face moisturizer really well! Con: I can't wear it around eyes; it causes stingy/ burning eyes. But, I have sensitive eyes ( sunscreens or mascara).
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Reviewed in the United States on February 5, 2026
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Verified Purchase
Kim Conard
West Palm Beach, US
★★★★★ 5
Great product
Size: 1.7 Fl Oz (Pack of 1)
Nice product. I like the pump to get a small amount. Glides nicely on my skin and no white residue. Not sticky.
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Reviewed in the United States on May 19, 2026
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chelsea
Cuba, US
★★★★★ 5
* Horrible eye pain! * Made my face glow! Great for dry skin as a moisturizer spf
Size: 1.7 Fl Oz (Pack of 1), Size: 1.7 Fl Oz (Pack of 1)
Update* After actually wearing it all day reaction - I wore this in the semi-sun to the beach just to walk to shoreline, not actually sitting in sun or getting into water just a 30 minute walk, and by one hour in my eye started to swell and both eyes were in horrible pain. I had to go was my face and eyes as well as put in repeated cosine to help my eyes. My eyes even over night after thorough washing and cleaning still have a slight pain to them. This also clogged some pores and made me itch and break out. I think if you are going to be in AC and no hint of sun or sweat this would be okay. However if you are buying to walk around in any kind of sun this may not be it. For me personally I will be returning. I was hoping this would’ve worked for me. I love neutrogena products but the reaction to my eyes impossible to use for me. First initial opening and putting in my face reaction- Very light weight. Smaller size than I realized. Makes my skin have a sheen soft glow. I would highly recommend for those who have dry skin. If you have naturally oily skin this may have a little too much sheen in it for you all. It does make my face feel absolutely baby soft. I was looking for a moisturizing spf for my face that doesn’t turn my skin white or cake on and over my skin and this is great. I will try it in the sun today and see how it lasts and works. No white at all which I absolutely love. Feels great in my skin. Fragrance free has barely any smell to it which is also nice. Oxybenzone free. It is slowly drying into my skin which is nice. I do not believe it is water or sweat proof so you will have to reapply. It hasn’t hurt my eyes so far but I will update when I am out in the sun to share more feedback if this feedback isn’t the same. Overall very happy.
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Reviewed in the United States on March 7, 2024
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rsorrell
Houston, US
★★★★★ 5
Excellent purchase
Size: 1.7 Fl Oz (Pack of 1)
It seems like it's a small bottle, but it works really well and goes on smooth. It helps me look healthy and I'm 65 years old.
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Reviewed in the United States on June 1, 2026

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