Two 3D noninterpenetrating porous metal-organic frameworks (PMOFs) [Cd-3(L-1)(2)(DMA)(2)]center dot DMA [1, H3L1 = tris(p-carboxylic acid)tridurylborane] and [Zn-3(L-2)(3)(H2O)(2)]center dot 5H(2)O center dot 2EtOH [2, H2L2 = 4,4'-((2,3,5,6-tetramethylphenyl)boranediyl)bis(2,3,5,6-tetramethylbenzoic acid)] were synthesized by employment of a C3-symmetric ligand (H3L1) to assembly with Cd(NO3)(2) or Zn(NO3)(2). Complex 1 exhibits a (3, 6)-connected topological network based on a Cd-3 cluster and Y-shaped trinodal organic linker. Complex 2 shows a 6-connected topology, since in situ decarboxylic reaction of the initial H3L1 occurred to generate a new ligand, H2L2, which can be considered as a linear linker. Both 1 and 2 exhibit blue fluorescence. Significantly, complex 1 with larger channels is unstable upon the removal of guest molecules. In contrast, activated 2 exhibits higher stability and permanent porosity.