Organic group-bridged hybrid materials with a Faujasite X zeolite structure (ZOF-X)

Applications of automated diffraction tomography (ADT) on nanocrystalline porous materials

“…When pores are connected with the crystal structure their size, connectivity and shape are uniform throughout the sample. These features, together with the position of acidic and open metal sites, drive porous materials behaviour more than their total empty volume and therefore structural characterization is crucial for a more efficient tuning of material structure and properties [3,4].…”

ECS‐3: A Crystalline Hybrid Organic–Inorganic Aluminosilicate with Open Porosity

“…[5] A more successful approach for synthesizing hybrid zeolites involves using bis-silylated organic precursors of general formula (R'O) 3 SiÀRÀSi(OR') 3 (R = CH 2 , CH 2 CH 2 ; R' = CH 3 , CH 2 CH 3 ) as silica source. [6][7][8] However, the much lower than expected organic content indicates that the Si À C bonds undergo hydrolysis. In any case, incorporation of methylene groups within the zeolite framework (an isomorphous substitution of ÀOÀ by ÀCH 2 À) is still debated because of the impossibility to distinguish a methylene group in the framework from one in the amorphous impurities that are usually present.…”

“…In any case, incorporation of methylene groups within the zeolite framework (an isomorphous substitution of ÀOÀ by ÀCH 2 À) is still debated because of the impossibility to distinguish a methylene group in the framework from one in the amorphous impurities that are usually present. [8] A breakthrough in the synthesis of crystalline aluminosilica-based hybrid organic-inorganic porous materials occurred in 2008 with the advent of ECS. [2] ECS synthesis resembles that of PMOs (i.e., low crystallization temperature and bissilylated organic precursors as silica source), except that no surfactants are used and NaAlO 2 is the source of aluminum.…”

Direct Synthesis of Functional Zeolitic Materials

“…The same authors reported the preparation of other organo-modified zeolitic materials, ZOL family [86,87]. Díaz et al [88] and Su et al [89] have described the synthesis and characterization of new hybrid organozeolites containing high organic content following a similar synthesis methodology to Yamamoto. On one hand, Díaz et al [88] used bridged organosiloxane precursors as silica sources, containing methylene and ethylene groups.…”

“…The presence of the organic groups was confirmed by 13 C and 29 Si MAS NMR and IR spectroscopy. On the other hand, Su et al [89] described the preparation of the methylene-modified X zeolite, using bis(triethoxysilyl)methane as the only silicon source. This hybrid zeolite showed an extraordinary hydrophobic nature, as revealed by thermogravimetry.…”