Ali Reza Oveisi, Saba Daliran, Matı́as Blanco, Amarajothi Dhakshinamoorthy, Ünal Şen, José Alemán, Hermenegildo Garcı́a
H groups. We describe the design and synthesis of SPOPs, highlighting how this functionalization tailors their properties for innovative applications. Moving beyond their well-known role as superior heterogeneous acid catalysts for organic transformations, SPOPs are now emerging as key materials for addressing global challenges. Their remarkable capabilities are evident in environmental applications, including their deployment as high-performance adsorbents for the removal of dyes, antibiotics, and heavy metals from water, as well as functional porous solids for selective gas separation. We also explore their pioneering applications as next-generation proton-conducting membranes for high-performance fuel cells and advanced energy storage systems, offering alternatives to fluorinated membranes. This review delivers both a critical analysis of the current state-of-the-art and a forward-looking perspective on the challenges and opportunities ahead, serving as a roadmap for leveraging the multifunctional properties of SPOPs to advance sustainable chemistry, environmental remediation, and energy technologies.