Water-Stable Metal-Organic Frameworks with Selective Sensing on Fe3+ and Nitroaromatic Explosives, and Stimuli-Responsive Luminescence on Lanthanide Encapsulation

Three water-stable luminescent MOFs [Zn-4(bptc)(2)(NMP)(3)(DMF)(H2O)(2)](n), (I-a), [Cd-4(bptc)(2)(NMP)(3)(DMF)(2)(H2O),] (1-b), and {[Zn-2(bptc)(DMA)(H2O)(2)]-(DMA)(2)(H2O)(1)](n) (2), possessing similar chemical components (M-2:L-1:Sol(3)) and topology structures, were synthesized by solvents control. Their excellent sensing on iron(III) cation and nitroaromatic explosives (NACs) with great selectivity, sensitivity and a high K (4.54 x 10(4) for 1-b on PNP) were observed by quenching effects. Furthermore, Zn-MOFs exhibit interesting stimuli-responsive luminescence enhancement after the encapsulation of a series of IIIB cations stimulated different luminescent emitting and intensity enhancement through host guest processes of the pores in MOFs, especially for two distinct responses of Zn-MOF on a Tb3+ cation.