The article discusses the use of inverse gas chromatography (IGC) to characterize the surface properties of solid materials, particularly focusing on the determination of dispersive and polar components of surface energy. The study highlights the importance of considering the temperature-dependent cross-sectional surface area of organic molecules and the London dispersive surface energy. The authors propose a new thermal model that accounts for these dependencies, which is shown to provide more accurate results compared to traditional methods like the Dorris-Gray and Schultz methods. The thermal model is applied to single-crystalline and polycrystalline TAPPy-TPA-COFs, and the results indicate that the polycrystalline surface exhibits a higher London dispersive surface energy and stronger basic character. The study also addresses the limitations of existing methods, such as the assumption of constant surface area and London dispersive surface energy, and suggests that further research is needed to validate the accuracy of the proposed methods.The article discusses the use of inverse gas chromatography (IGC) to characterize the surface properties of solid materials, particularly focusing on the determination of dispersive and polar components of surface energy. The study highlights the importance of considering the temperature-dependent cross-sectional surface area of organic molecules and the London dispersive surface energy. The authors propose a new thermal model that accounts for these dependencies, which is shown to provide more accurate results compared to traditional methods like the Dorris-Gray and Schultz methods. The thermal model is applied to single-crystalline and polycrystalline TAPPy-TPA-COFs, and the results indicate that the polycrystalline surface exhibits a higher London dispersive surface energy and stronger basic character. The study also addresses the limitations of existing methods, such as the assumption of constant surface area and London dispersive surface energy, and suggests that further research is needed to validate the accuracy of the proposed methods.