Spiro-Thioketal-Based Porous Organic Polycarbazoles for the Efficient Capture of Trifluoroacetic Acid Vapor

Trifluoroacetic acid (TFA) is a ubiquitous and persistent environmental pollutant with significant environmental and human health impacts. To the best of our knowledge, no study has reported the use of porous organic polymers to adsorb TFA vapor. In this study, we successfully synthesized a polymer (POPSP-4) that exhibits both physical and chemical adsorption for efficient TFA capture, and physical adsorption can occur at the sulfur sites. With the assistance of organic bases, the adsorption capacity of the polymer increases from 2.3 g·g–1 to over 4 g·g–1 in 1 h and effectively prevents the escape of TFA from the polymer. This study presents a promising methodology for the design and synthesis of porous organic materials, specifically for the efficient capture of TFA vapor.