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Highly Porous Aluminophosphates with Unique Three Dimensional Open Framework Structures from Mild Hydrothermal Syntheses

Abstract

Crystals of three novel highly porous aluminophosphates, namely, α-NaAlPO4(OH)(1), β-NaAlPO4(OH)(2) and Al3.5P5.5O19(3), were synthesized through mild hydrothermal methods. Interestingly, among these three porous aluminophosphates, 1 is polar, whereas other compounds are nonpolar and centrosymmetric. The 3D framework structure of 1 is built up by AlO6 octahedra and isolated PO4 tetrahedra. 1D Al-chains are linked by PO4 tetrahedra via sharing corners, forming the 3D framework, 1D 8-Membered Rings (MRs) tunnels were observed along the c-axis. Importantly, the material of 1 exhibits moderate second harmonic generation (SHG) effect. 2 features a unique 3D anionic framework composed of corner-sharing [Al2O11] dimers and isolated PO4 tetrahedra. Three intersecting tunnels along the axes can be observed, the small tunnels along the c-axis are based on 4-MRs, whereas the two 6-MRs are along the a- and b-axis. The structure of 3 displays a unique 3D framework based upon face-sharing [Al2O9] dimers and isolated PO4 tetrahedra. The small tunnels along the a-and b-axis are based upon 4-MRs, whereas the 1D larger tunnels are based on 12-MRs along the c-axis. Here, the syntheses and topological structures of α-NaAlPO4(OH)(1), β-NaAlPO4(OH)(2) and Al3.5P5.5O19(3), as well as their elemental analysis, thermal stability, infrared spectroscopy, UV-vis diffuse reflectance and nonlinear optical (NLO) properties are also reported.

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Supplementary files

Article information


Submitted
18 Jan 2020
Accepted
26 Mar 2020
First published
26 Mar 2020

CrystEngComm, 2020, Accepted Manuscript
Article type
Paper

Highly Porous Aluminophosphates with Unique Three Dimensional Open Framework Structures from Mild Hydrothermal Syntheses

Y. Hao, Y. Pan, Y. Lin, L. He, G. Ge, Y. Ruan, H. Zhou, Y. Xue and K. Koirala, CrystEngComm, 2020, Accepted Manuscript , DOI: 10.1039/D0CE00075B

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