Ionic frameworks (IFs), characterized by ionic bonds and periodic framework structures, find extensive applications in several fields. However, the inherent high bond energy of ionic bonds often leads to the formation of close-packed structures rather than open frameworks. Consequently, the selection of suitable building units is pivotal for the successful synthesis of IFs. Utilizing the large size and negative charge of polyoxometalates (POMs), along with their combination with metal cations, offers an effective approach for constructing IFs. In this study, 2D IFs are fabricated using {Na