Microwave-assisted Synthesis of Transition Metal Oxy-Hydroxy-Fluorides

2 Microwave-assisted Synthesis of Transition Metal Oxy-Hydroxy-Fluorides 

Here again, the use of microwave-assisted route enables the synthesis of a new series of Ti-based fluoride nanomaterials at low duration time and low temperature. Beside, the report of a phase derived from the HTB-type structure, the synthesis conditions favour the competition between OH and F ions, leading to new compositions besides TiOF2, the only titanium oxyfluoride reported so far by various authors through various synthesis 

Xie et al. have synthesized a new tin-titanium oxy-hydroxy-fluoride Sni 24Tii 9403.66(0H)i 5qFi 42 exhibiting a pyrochlore-type structure. The synthesis 

In the search of porous inorganic-organics hydrides solids (see other contributions in this volume) which display several potential applications, the development of new synthesis routes is of crucial importance because the conventional methods generally consist of hydro- or solvo-thermal processes that require up to several days. The cubic chromium terephthalate Cr3F(H20)20[C6R4(C02)2]3 (MIL-101), for instance, has been successfully synthesized using a microwave solvothermal process. Owing to the faster dissolution of the precursors and/or the condensation process, the MIL-101 can be obtained even after 1 min of irradiation at 210 °C. Finally, a well crystallized material is obtained for 40 min of irradiation at 210 °C while the conventional method is performed at 220 °C for 10 h. The very rapid synthesis of MIL-101 leads to nanosized crystals that result in an improvement of the sorption properties of benzene. 

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