TCS PIM-1 is primarily used in advanced gas separation technologies due to its highly microporous structure and exceptional surface area. It shows high permeability and selectivity for gases such as carbon dioxide (CO₂), making it valuable in carbon capture applications from flue gas or natural gas purification. Its rigid polymer framework maintains performance under varying pressures and temperatures, which is beneficial for industrial-scale membrane processes. It is also employed in research for hydrogen (H₂) and methane (CH₄) separation, contributing to clean energy initiatives. Due to its solution-processability, TCS PIM-1 can be fabricated into thin films and mixed matrix membranes, enhancing integration into existing membrane systems. Additionally, it has been explored in sensing applications and as a sorbent in environmental remediation for removing volatile organic compounds (VOCs) from air.