Chem. J. Chinese Universities

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Synthesis and Structure of Manganese Zinc Phosphate-phosphite with Extra Large Twenty-membered Ring Channels

YANG Yang, ZHAO Yong-Nan*, YU Jian-Guo   

  1. Institute of Nanostructured Materials, Tianjin Key Laboratory of Fiber Modification and Functional Fiber, Tianjin Polytechnic University, Tianjin 300160, China
  • Received:2007-07-24 Revised:1900-01-01 Online:2007-12-10 Published:2007-12-10
  • Contact: ZHAO Yong-Nan

Abstract: A novel three-dimensional manganese zinc phosphatophosphite [H2CHBMA][Zn1.5Mn(HPO3)2(PO4)]·H2O(TJPU-3Mn) with extra-large twenty-membered ring channels was isolated by 1,3-cyclohexanebis(methylamine) as the template under hydrothermal conditions. Single crystal structure refinement reveals that TJPU-3Mn crystallizes in the monoclinic space group C2/c, with cell parameters, a=3.3929(7) nm, b=1.3045(3) nm, c=0.89713(18) nm, β=104.37(3)°, V=3.8465(13) nm3, Z=2. The connectivities of the ZnO4, MnO4, PO4 and HPO3 groups create a three-dimensional porous architecture with extra-large twenty-membered ring channels intersected by eight-membered rings. It is the first structure analogue to the famous aluminophsphate JDF-20. More interestingly, the diprotonated CHBMA cations in the channel are all in cis configuration, indicating the potential for separation and recognition of CHBMA isomers. Powder X-ray patterns reveal the structure of TJPU-3Mn sustains after the emission of water molecules obtained by calcining at 150 ℃ for 2 h.

Key words: Hydrothermal synthesis, Zinc manganese phosphate-phosphite, Single crystal structure

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