The solvothermal synthesis of framework isomers was carried out using the hybrid carboxylate and tetrazolate functional ligand, 4-tetrazolyl benzenecarboxylic acid (H
2TBC, TBC = 4-tetrazolyl benzenecarboxylate) and zinc. H
2TBC was also synthesized with the solvothermal approach, and is referred herein
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The solvothermal synthesis of framework isomers was carried out using the hybrid carboxylate and tetrazolate functional ligand, 4-tetrazolyl benzenecarboxylic acid (H
2TBC, TBC = 4-tetrazolyl benzenecarboxylate) and zinc. H
2TBC was also synthesized with the solvothermal approach, and is referred herein as structure
1. Using single-crystal X-ray diffraction, we found that the tetrazolate groups of TBC show an unusual “opposite-on” coordination mode with zinc. Three previously characterized metal-organic frameworks (MOFs) were obtained by systematically changing the solvents of the H
2TBC-Zn reaction, (1) ZnTBC,
2, which has a non-porous structure; (2) Zn
2(TBC)
2(H
2O),
3, which has an amphiphilic pore structure and (3) Zn
2(TBC)
2{guest},
4, which is porous and has channels containing uncoordinated N heteroatoms. Fluorescence spectra of
4 reveal a strong blue emission mainly from the TBC ligands.
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