Journal
CRYSTALS
Volume 5, Issue 2, Pages 193-205Publisher
MDPI AG
DOI: 10.3390/cryst5020193
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Funding
- NSF [DMR-0934212]
- EPSCoR [IIA-1301346]
- Los Alamos National Laboratory
- DOE [DE-AC52-06NA25396]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0934212] Funding Source: National Science Foundation
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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 (H2TBC, TBC = 4-tetrazolyl benzenecarboxylate) and zinc. H2TBC 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 H2TBC-Zn reaction, (1) ZnTBC, 2, which has a non-porous structure; (2) Zn-2(TBC)(2)(H2O), 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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