Metal-free POSS-based crosslinked polymers with triazole linkers as efficient single-component catalysts for CO2 conversion
Issued Date
2026-06-01
Resource Type
ISSN
22129820
Scopus ID
2-s2.0-105037089987
Journal Title
Journal of Co2 Utilization
Volume
108
Rights Holder(s)
SCOPUS
Bibliographic Citation
Journal of Co2 Utilization Vol.108 (2026)
Suggested Citation
Yuwananonta K., Kunthom R., Pornchaiprasartkul P., Somsri S., Bunchuay T., Injongkol Y., Phomphrai K., Bureekaew S., Rungtaweevoranit B., Sangtrirutnugul P. Metal-free POSS-based crosslinked polymers with triazole linkers as efficient single-component catalysts for CO2 conversion. Journal of Co2 Utilization Vol.108 (2026). doi:10.1016/j.jcou.2026.103440 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/116504
Title
Metal-free POSS-based crosslinked polymers with triazole linkers as efficient single-component catalysts for CO2 conversion
Corresponding Author(s)
Other Contributor(s)
Abstract
Developing efficient, metal-free catalysts for CO<inf>2</inf> utilization remains a significant challenge in green chemistry. In this work, we report two polyhedral oligomeric silsesquioxane (POSS)-based crosslinked polymers, ionic POSS-QAS-1 and neutral POSS-triprop , bearing multi-triazole linkers synthesized via copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC). Comprehensive spectroscopic analyses confirm successful triazole incorporation, the presence of iodide ions (for POSS-QAS-1 ), and partial POSS cage opening forming silanol groups. The ionic POSS-QAS-1 exhibited outstanding catalytic activity for solvent- and co-catalyst-free CO<inf>2</inf>/epoxide cycloaddition, achieving > 99% conversion and 93% selectivity with epichlorohydrin (100 °C, 1 atm CO<inf>2</inf>, 24 h; TOF = 3.3 h<sup>−1</sup>). Under elevated CO<inf>2</inf> pressures (10–20 atm), POSS-QAS-1 efficiently converted various terminal epoxides and can be reused for four cycles with minimal activity loss. Computational studies support an exergonic pathway involving silanol-assisted epoxide activation and iodide-mediated ring opening. These results highlight POSS-QAS-1 as an efficient, recyclable, and environmentally friendly catalyst for CO<inf>2</inf> valorization.