Chemical Research in Chinese Universities ›› 2017, Vol. 33 ›› Issue (4): 513-519.doi: 10.1007/s40242-017-7050-9

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Structure-directing Effect on Synthesis of Layered Aluminophosphates with Same Topology

WANG Aitian1, XU Jun2, WANG Chao2, DENG Feng2, XU Ruren1, YAN Wenfu1   

  1. 1. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China;
    2. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, P. R. China
  • Received:2017-02-13 Revised:2017-03-15 Online:2017-08-01 Published:2017-05-08
  • Contact: YAN Wenfu E-mail:yanw@jlu.edu.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China(Nos.21571075,21320102001,21621001) and the National Key Research and Development Program of China(No.2016YFB0701100).

Abstract:

Three layered aluminophosphates(UiO-15, APDAP12-150 and APDAP-150) with same topology were crystallized from an initial mixture with a molar composition of Al2O3:1.5P2O5:5.5R:227H2O, where R is ethylenediamine, 1,2-diaminopropane or 1,3-diaminopropane, respectively. The crystallization processes of UiO-15, APDAP12-150 and APDAP-150 were investigated using solid-state NMR in combination with XRD and other characterization techniques. The evolution of the coordination states of Al and P in the solid products was monitored, and the possible starting points of crystallization(core units) of UiO-15, APDAP12-150 and APDAP-150 were obtained and analyzed. The formation of a trimer as well as a hexamer of aluminophosphate, a monomer of PO4 and a nonamer containing two three-membered rings is critical for the start of crystallization of UiO-15. The formation of a hexamer and a pentamer is critical for the start of crystallization of APDAP12-150. The formation of an AlO6 monomer and a pentamer containing a three-membered ring is critical for the start of crystallization of APDAP-150. The crystal water played a co-structure-directing role in the formation of APDAP-150.

Key words: Zeolite, Aluminophosphate, Templating effect, Structure-directing effect