SYSU-6, A New 2-D Aluminophosphate Zeolite Layer Precursor

Abstract

Two-dimensional aluminophosphate is an important precursor of phosphate-based zeolites; a new Sun Yat-sen University No. 6 (SYSU-6) with |Hada|2[Al2(HPO4)(PO4)2] has been synthesized in the hydrothermal synthesis with organic structure-directing agent (OSDA) of N,N,3,5-tetramethyladamantan-1-amine. In this paper, SYSU-6 is characterized by single-crystal/powder X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray analysis, transmission electron microscopy, infrared and UV Raman spectroscopy, solid-state 27Al, 31P and 13C magic angle spinning (MAS) NMR spectra, and elemental analysis. The single-crystal X-ray diffraction structure indicates that SYSU-6 crystallized in the space group P21/n, with a = 8.4119(3), b = 36.9876(12), c = 12.5674(3), α = 90°, β = 108.6770(10)°, γ = 90°, V = 3704.3(2) Å3, Z = 4, R = 5.12%, for 8515 observed data (I > 2σ(I)). The structure has a new 4,12-ring layer framework topology linked by alternating AlO4 and PO4 tetrahedra. The organic molecules reside between the layers and are hydrogen-bonded to the inorganic framework. The new type of layer provides a greater opportunity to construct zeolite with novel topology.

A Layered Aluminophosphate [C17H21N2]3[Al3(PO4)4]·5H2O with Fluorescent Property Derived from Carbazolyl-Modified Template

“…So far, more than 100 kinds of templates have been successfully used, typically containing quaternary ammonium cations and various organic amines including primary, secondary, tertiary, and cyclic amines, metal–ligand complexes, alkanolamines, etc. Very recently, the use of rigid and bulky templates was proposed as a strategy for preparing novel layered aluminophosphates, which has been successfully proven in the case of SYSU-6, SYSU-2, and ZHKU-1. − …”

Zeolitic Microporous Materials and Their Applications

“…Qiu et al [ 2 ] present a new zeolitic material, named SYSU-6, consisting of a 2-dimensional aluminophosphate zeolite layer precursor. The structure has been elucidated by single crystal X-ray diffraction and is composed of a new layer framework containing 4,12-ring linked by alternating AlO 4 and PO 4 tetrahedra.…”