Thermogravimetric analysis (TGA) performed on the as prepared FJI-C4 reveals that materials underwent a continuous weight loss below 250 °C, which can be ascribed to the loss of all free molecules. Thereafter, the weight remains almost constant until the framework begins to collapse at 390 °C. These observations suggest FJI-C4 is water-stable and thermalstable and can be a potential candidate for real application