POPs to COFs by post-modification: CO 2 chemisorption and dissolution

• Published in: Organic & biomolecular chemistry Vol. 22; no. 12; pp. 2456 - 2464
• Main Authors: Aladwan, Ayham A, Qaroush, Abdussalam K, Eftaiha, Ala'a F, Hammad, Suhad B, Al-Qaisi, Feda M, Assaf, Khaleel I, Repo, Timo
• Format: Journal Article
• Language: English
• Published: England 20.03.2024
• ISSN: 1477-0520; 1477-0539
• DOI: 10.1039/D3OB02054A

Porous organic polymers (POPs) and covalent organic frameworks (COFs) are hierarchical nano materials with variable applications. To our knowledge, this is the first report of a post-modified, non-renewable, DMSO-soluble M-POP/1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) upon atmospheric H O/CO trapping after 48 h, forming a DBUH HCO adduct, as verified by solution carbon-13 nuclear magnetic resonance ( C NMR) spectroscopy. The success of the post-modification resulting from aldehyde enriched POPs was proven spectroscopically. The accessible functional group was reacted with excess monoethanolamine ( ) resulting in the formation of M-POP. Away from CO physisorption, only few examples have been reported on the chemisorption process. One such example is the ethylene diamine-functionalized , capable of capturing CO carbamation. This was evidenced by several qualitative measurements including colorimetry and conductivity, which showed an unprecedented water solubility for a 2D COF material. The crystallinity of COFs as a result of post-modification was proven by powder X-ray diffraction (PXRD).