A Korea–Germany joint research study that synthesizes research achievements and future strategies on POSS-based ionic liquids (POSS-ILs), a next-generation functional material, has been published in the world’s leading journal in the field of chemistry.

A joint research team comprising Jeonbuk National University (JBNU) Professor Yoon Young-sang (Division of Chemical Engineering), Professor Stefan Stolte of Dresden University of Technology, and Professor Cho Cheol-woong of Chonnam National University announced on the 19th that they had published a review article comprehensively analyzing research on POSS-ionic liquids in Chemical Reviews, published by the American Chemical Society (ACS).

Chemical Reviews selectively publishes invited articles that systematically consolidate accumulated achievements in a field and propose future research directions. With an impact factor of 55.8, it ranks among the top 0.4% of journals in the chemical sciences. This paper was included in the special issue "Ionic Liquids for Diverse Applications."

POSS (Polyhedral Oligomeric Silsesquioxane) is a cage-shaped silica nanostructure with excellent thermal and mechanical stability and structural precision. Ionic liquids allow free tuning of viscosity, conductivity, polarity, and other properties through combinations of ions, and have been used in a wide range of fields, including catalysis, electrochemistry, separations and purification, and green processing.

The research team noted that POSS-ionic liquids, which combine these two materials, are hybrid materials that can complement the limitations of conventional ionic liquids while realizing new functionalities, making them a 'blue chip' in materials science.

In the paper, the team systematically summarized major synthetic strategies, such as direct functionalization, ionic liquid grafting, and sol–gel processes, and provided an in-depth analysis of key properties including thermal and mechanical stability, ionic conductivity, viscosity control, and chemical durability.

They particularly evaluated that POSS-ionic liquids could serve as meaningful alternatives in various industrial areas, such as catalytic systems stable at high temperatures, next-generation batteries based on solid electrolytes, and reusable separation and adsorption materials. The team also emphasized that leveraging POSS's modular structure allows precise control over the number and arrangement of ionic functional groups, enabling tailored material design optimized for specific purposes.

They also addressed not only material performance but also significant future challenges related to environmental and biosafety issues. The research team pointed out that, as key tasks for commercialization, evaluations of toxicity, biodegradability, and long-term environmental behavior must precede, and proposed a 'Safety-by-Design' strategy that incorporates safety considerations from the design stage.

Professor Cho Cheol-woong (Chonnam National University), a former student of Professor Yoon Young-sang and a key author of this study, said, 'POSS-ionic liquids can develop into an important platform technology in the energy, environment, and advanced materials sectors that require both high performance and stability. This review is significant not only because it systematically organizes related research but also because it discusses functional material design together with environmental and toxicological assessments.'