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Synthesis and characterization of two layered aluminophosphates [R-C8H12N]8[H2O]2·[Al8P12O48H4] and [S-C8H12N]8[H2O]2·[Al8P12O48H4] with mirror symmetric feature and their proton conductivity

Abstract

The template effect of chiral organic molecules to aluminophosphate open frameworks was investigated by the syntheses of two layered structures [R-C8H12N]8[H2O]2·[Al8P12O48H4] and [S-C8H12N]8[H2O]2·[Al8P12O48H4] (denoted as AlPO-CJ72-R and -S) with mirror symmetric feature. The two structures are obtained separately, which is the first instance in inorganic open-framework materials to our knowledge, by α-methylbenzylamine with homochirality. Single-crystal X-ray diffraction analysis reveals that the structure of either AlPO-CJ72-R or AlPO-CJ72-S crystallizes in the chiral triclinic space group P1, and the existance AAAA-stacked Al2P3O123- layers made of alternating AlO4 and PO3(=O) or PO2(=O)(OH) tetrahedra to form a 4 × 6 network. Their structures show self-assembled chiral H-bond chains, and the chiralities of which are transferred to adjacent helical T−O (T = Al and P) chains. The frameworks exhibit the mirror symmetric feature to each other. The performance of AlPO-CJ72 in proton conductivity was tested. It shows an excellent result up to 3.01 × 10-3 S cm-1 (363 K, 98% RH), which might be attributed to the H-bond chains in the structure.

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Publication details

The article was received on 05 May 2017, accepted on 13 Jun 2017 and first published on 13 Jun 2017


Article type: Paper
DOI: 10.1039/C7DT01643C
Citation: Dalton Trans., 2017, Accepted Manuscript
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    Synthesis and characterization of two layered aluminophosphates [R-C8H12N]8[H2O]2·[Al8P12O48H4] and [S-C8H12N]8[H2O]2·[Al8P12O48H4] with mirror symmetric feature and their proton conductivity

    Y. Yu, J. Zhu, J. liu, Y. Yan and X. Song, Dalton Trans., 2017, Accepted Manuscript , DOI: 10.1039/C7DT01643C

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