Abstract
The ZnF2-3,5-diamino-1,2,4-triazole-HF-H2O system has been explored by hydrothermal syntheses over a large domain of concentrations using micro-wave heating. In the composition space diagram, the crystallization areas of two fluorinated guanazolate MOFs, [Zn3F2] ·(Am2TAZ)4 (I) and the previously described [ZnF]·(Am2TAZ) (II), have been defined (with Am2TAZ = 3,5-diamino-1,2,4-triazolate). Compound (I) (tetragonal, P 4/n n c (#126), a = 11.7055(6), c = 7.3291(4)) was characterized by single-crystal X-ray diffraction, thermogravimetric measurement and 1H and 19F solid-state nuclear magnetic resonance (NMR) spectroscopy. Its crystal structure, showing a tfj topology, contains a unusual zinc double coordination. It can be described as infinite chains running along the crystallographic a- and b-directions in which clusters of Zn2N4 tetrahedra and ZnN4F2 octahedra alternate. The analysis of the ZnF 2-HAm2TAZ-HF-H2O composition space diagram gives possible hints on a relationship between the HF concentration in solution and the zinc coordination environment in the final guanazolate fluorinated MOF obtained.
Original language | English (US) |
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Pages (from-to) | 104-108 |
Number of pages | 5 |
Journal | Journal of Fluorine Chemistry |
Volume | 150 |
DOIs | |
State | Published - Jun 2013 |
Keywords
- Fluorinated metal-organic framework materials
- Hydrothermal synthesis
- Microwave
- Solid state NMR
ASJC Scopus subject areas
- Biochemistry
- Inorganic Chemistry
- Physical and Theoretical Chemistry
- Environmental Chemistry
- Organic Chemistry