Novel aluminophosphate Na6[Al3P5O20] with the original microporous crystal structure established in the study of a pseudomerohedric microtwin

The synthesis and characterization of a new aluminophosphate, Na6[Al3P5O20], obtained as single crystals in the same experiment together with Cl-sodalite, Na8[Al6Si6O24]Cl2, is reported. Na6[Al3P5O20], with a strongly pseudo-orthorhombic lattice, is described by the monoclinic crystal structure established in the study of a pseudomerohedric microtwin. The design of Na6[Al3P5O20] can be interpreted as an alternative to sodalite, with a monoclinic (pseudo-orthorhombic) 2×4×1 super-structure and unit-cell parameters multiples of those of sodalite: a ≃ 2a s, b ≃ 4b s and c ≃ c s. The triperiodic framework is built by AlO6, AlO4 and PO4 polyhedra having vertex-bridging contacts. While all the oxygen vertices of the Al-centred octahedra and tetrahedra are shared with phosphate groups, some of the PO4 tetrahedra remain `pendant', e.g. containing vertices not shared with other polyhedra of the aluminophosphate construction. Na atoms occupy framework channels and cavities surrounded by eight-, six- and four-membered windows with maximal effective pore widths of 4.86 × 3.24 and 4.31 × 3.18 Å. The generalized framework density is equal to 19.8, which means that the compound may be classified as a microporous zeolite. The Na6[Al3P5O20] crystal structure is discussed as being formed from octahedral rods arranged in two perpendicular directions, similar to the rods elongated in one direction in the NASICON-type compounds, which have been intensively investigated as promising materials for batteries. Analogous properties can be expected for phases with a modified composition of the Na6Al3P5O20 topology, where the Al atoms at the centres of octahedra are replaced by Fe, V or Cr.

Rapid and facile synthesis of hierarchical nanocrystalline SSZ-13 via the interzeolite transformation of ZSM-5

Hierarchical SSZ-13 was successfully synthesized via the interzeolite conversion of ZSM-5 with high framework density (FD = 18.4 T/1000 Å3) in the presence of N,N,N-trimethyl-1-adamantanamine hydroxide (TMAdaOH) under hydrothermal conditions.

A New Functional Material of Immobilized Ionic Liquid on Cotton Cellulose

Cellulose originating from cotton was used as raw material to prepare the functional supported ionic liquid, which had the advantages including wide source, inexpensiveness and easy modification. After the scientific and efficient synthesis process, the product of cellulose balls was characterized for their moisture content, wet density, framework density, porosity and acid/alkali resistance. Finally, ionic liquid was successfully immobilized on them through chemical bonds, which is expected to be applied as a new material in chemical, biological and environmental fields.

A zeolite CAN-type aluminoborate with gigantic 24-ring channels

A well crystalline chiral aluminoborate with extra-large 24-ring channels was solvothermally made by using amines as templates. It exhibits a rare zeolite CAN-type net with very low framework density and high nonframework volume by incorporating B5O10 clusters and AlO4 tetrahedra.