Synthesis, structure and characterization of neat Zn2(OH)2 diamond-core chains linked through 2,2′,4,4′-biphenyl-tetracarboxylate

Reaction of 2,2′,4,4′-biphenyltetracarboxylic acid (2,4-H4bptc), Zn(NO3)2 · 6H2O in the presence of NaOH hydrothermally at 180 °C affords the first 2,4-H4bptc complex [Zn3(μ3-OH)2(2,4-bptc)]n · 2nH2O (1). Crystal structure indicates that 1 is Zn2(OH)2 diamond-core chains linked through 2,2′,4,4′-biphenyltetracarboxylate. 1 was characterized by TG, IR and fluorescence spectra. 1 is the first example of 2,4-H4bptc complex and also first neat Zn2(OH)2 diamond-core chains.