A new gallium-2,4′-biphenyldicarboxylate layer structure with parallelogram tunnels

A new 2D gallium metal–organic framework formulated as Ga(OH)(BPDA) (1) (H2BPDA = 2,4′-biphenyldicarboxylic acid, C14O4H10) has been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction, infrared (IR) spectroscopy, thermal gravimetric analysis (TGA) and luminescence studies. The neutral layer structure of the coordination polymer 1 is constructed from GaO4(OH)2 octahedra and organic BPDA2- linkers, with the parallelogram tunnels joined through one-dimensional single bondOHsingle bondGasingle bondOHsingle bond chains. Complex 1 exhibits intense green-blue emission at 482 nm (λex = 329 nm) in the solid state at room temperature.