Dynamic porous coordination polymer based on 2D stacked layers exhibiting high sorption selectivity for CO2

Area of Science:

• Materials Science
• Chemistry
• Nanotechnology

Background:

• Porous coordination polymers (PCPs) are advanced materials with tunable structures.
• Developing materials with selective gas adsorption properties is crucial for environmental applications.

Purpose of the Study:

• To synthesize and characterize a new dynamic porous coordination polymer (PCP).
• To investigate the gas adsorption properties of the synthesized PCP, focusing on selectivity and framework flexibility.

Main Methods:

• Solvothermal, hydrothermal, and microwave synthesis methods were employed.
• Gas adsorption studies were conducted to evaluate selectivity for CO2, N2, CH4, and CO.
• Variable temperature activation was used to probe framework flexibility.

Main Results:

• A new dynamic PCP, [Ni(dcpy)(bipy)(0.5)(H2O)]·1.5H2O (1), was successfully synthesized with a wavelike 2D stacked layer framework.
• PCP 1 exhibited high selective adsorption of carbon dioxide (CO2) over nitrogen (N2), methane (CH4), and carbon monoxide (CO).
• The nitrogen adsorption capacity was found to be sensitive to activation temperature, indicating framework flexibility.

Conclusions:

• The synthesized PCP 1 shows significant potential for selective CO2 capture.
• The dynamic and flexible nature of the PCP framework can be utilized to tune gas adsorption properties, particularly for N2.