Constructing covalent organic frameworks in water via dynamic covalent bonding.
Jayshri Thote1, Harshitha Barike Aiyappa2, Raya Rahul Kumar3
1Physical/Materials Chemistry Division, CSIR-National Chemical Laboratory , Dr Homi Bhabha Road, Pune, Maharashtra 411008, India.
Iucrj
|November 15, 2016
Summary
Researchers developed a greener method to create porous polymers in water for the first time. This new approach utilizes Dynamic Covalent Chemistry (DCC) to form stable, crystalline Covalent Organic Frameworks (COFs) with comparable properties to traditional methods.
Area of Science:
- Materials Science
- Polymer Chemistry
- Green Chemistry
Background:
- Covalent Organic Frameworks (COFs) are typically synthesized using solvothermal methods, which involve organic solvents and high temperatures.
- Developing water-based synthetic routes for COFs is highly desirable for environmental sustainability and cost-effectiveness.
Purpose of the Study:
- To investigate the first-time formation of keto-enamine based crystalline, porous polymers in water.
- To explore the use of Dynamic Covalent Chemistry (DCC) principles for synthesizing stable porous structures in an aqueous environment.
- To understand the influence of monomer structure on COF formation in water.
Main Methods:
- Utilizing Schiff base reactions in water to form keto-enamine linkages.
- Employing Dynamic Covalent Chemistry (DCC) principles for polymer network construction.
- Investigating the keto-enol tautomerism of aldehyde monomers in aqueous solution.
Main Results:
- Successfully synthesized stable, crystalline, porous Covalent Organic Frameworks (COFs) in water.
- The water-based COFs exhibited comparable crystallinity, surface area, and porosity to those synthesized via solvothermal methods.
- Demonstrated the feasibility of using hydroxy and non-hydroxy aldehyde analogues for COF formation in water.
Conclusions:
- A viable and greener synthetic route for producing porous COFs in water has been established.
- The study highlights the potential of DCC and keto-enol tautomerism for sustainable COF synthesis.
- This water-based approach offers a promising alternative for the scalable production of functional porous materials.
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