Aluminum Fluoride as a Storage Matrix for Atomic Hydrogen

Fluorine functionalized compounds of group 13 elements

“…The aluminum trifluoride (AlF 3 ) x has attracted chemists attention for many decades due to its industrial application although it is an involatile and highly insoluble compound [9,10]. Analogous to the preparation of soluble aluminum compounds such as hydroxides [11][12][13][14], chlorides [15], and alumoxanes [16] it was also a synthetic challenge to synthesize soluble aluminum fluorides.…”

Nanocrystalline CaF2 particles obtained by high-energy ball milling

“…As previous investigations evidenced, H d trapping at ambient temperatures after g-irradiation needs high symmetric cages of certain size [43,44]. Due to strongly decreased particle sizes and the accompanying microstructural changes by milling, the number of such sites is reduced.…”

“…In comparison to H d in AlF 3 [29,[43][44][45], the atomic hydrogen H d stabilized in CaF 2 powders has a different behaviour concerning the temperature dependence of the hyperfine coupling constant (hfcc) [29], concerning thermal decay reactions and the saturation behaviour of its EPR signal [30]. A detailed study will be subject of a separate paper [46].…”

The very strong solid Lewis acids aluminium chlorofluoride (ACF) and bromofluoride (ABF)—Synthesis, structure, and Lewis acidity

“…The occurrence of such radical species in ACF might be surprising. Hence, it is known that partially amorphous matrices of pure aluminium fluoride are able to stabilise organic radicals and even atomic hydrogen at room temperature and above [45,46].…”