The reaction of Mg²⁺ and 5-{1, 3-dioxo-1H-benzo[de]isoquinolin-2(3H)-yl}terephthalic acid (H₂L) leads to two metal-organic frameworks, [Mg(L)(DMF)₂(H₂O)₂]₂·5DMF·2H₂O (1) with a 1D structure and [Mg₂(L)₂(DMSO)₃(H₂O)] (2) with a 2D (4, 4)-net structure. Interestingly, the two compounds exhibit distinct luminescent responses to external mechanical stimuli. 1 exhibited exceptional resistance mechanical chromic luminescence (RMCL), which can be attributed to the predominant hydrogen bonds and the presence of high-boiling-point solvent molecules within its structure. 2 had a reversible MCL property, which can be attributed to the dominant π-π weak interactions, coupled with the reversible destruction/restoration of its crystallinity under grinding/fumigation.

The residues of Al³⁺, Ga³⁺, and In³⁺ in the environment pose an increasingly serious threat to human health and ecosystems. However, their specific and rapid detection remains challenging. In this study, we present a water-stable cadmium metal-organic framework (Cd-MOF) based luminescence probe, which can detect Al³⁺, Ga³⁺, and In³⁺ ions in aqueous solutions via a luminescence "turn-on" mode. The corresponding detection limits for the Al³⁺, Ga³⁺, and In³⁺ ions were 2.31, 3.06, and 2.78 μmol·L^-1, respectively. This probe operated effectively within a pH range of 3-10 in an all-aqueous environment. Investigations into the detection mechanism revealed that this "turn-on" recognition is attributed to the formation of new structures upon ion interaction.